* [PATCH 01/57] Clean acquirewdt and check for BKL dependancies
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
@ 2008-05-19 13:04 ` Alan Cox
2008-05-19 13:04 ` [PATCH 02/57] clean up and check advantech watchdog Alan Cox
` (56 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:04 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
This brings the file into line with coding style.
---
drivers/watchdog/acquirewdt.c | 119 ++++++++++++++++++++---------------------
1 files changed, 58 insertions(+), 61 deletions(-)
diff --git a/drivers/watchdog/acquirewdt.c b/drivers/watchdog/acquirewdt.c
index 85269c3..269ada2 100644
--- a/drivers/watchdog/acquirewdt.c
+++ b/drivers/watchdog/acquirewdt.c
@@ -58,39 +58,46 @@
#include <linux/types.h> /* For standard types (like size_t) */
#include <linux/errno.h> /* For the -ENODEV/... values */
#include <linux/kernel.h> /* For printk/panic/... */
-#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
+#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV
+ (WATCHDOG_MINOR) */
#include <linux/watchdog.h> /* For the watchdog specific items */
#include <linux/fs.h> /* For file operations */
#include <linux/ioport.h> /* For io-port access */
#include <linux/platform_device.h> /* For platform_driver framework */
#include <linux/init.h> /* For __init/__exit/... */
-#include <asm/uaccess.h> /* For copy_to_user/put_user/... */
-#include <asm/io.h> /* For inb/outb/... */
+#include <linux/uaccess.h> /* For copy_to_user/put_user/... */
+#include <linux/io.h> /* For inb/outb/... */
/* Module information */
#define DRV_NAME "acquirewdt"
#define PFX DRV_NAME ": "
#define WATCHDOG_NAME "Acquire WDT"
-#define WATCHDOG_HEARTBEAT 0 /* There is no way to see what the correct time-out period is */
+/* There is no way to see what the correct time-out period is */
+#define WATCHDOG_HEARTBEAT 0
/* internal variables */
-static struct platform_device *acq_platform_device; /* the watchdog platform device */
+/* the watchdog platform device */
+static struct platform_device *acq_platform_device;
static unsigned long acq_is_open;
static char expect_close;
/* module parameters */
-static int wdt_stop = 0x43; /* You must set this - there is no sane way to probe for this board. */
+/* You must set this - there is no sane way to probe for this board. */
+static int wdt_stop = 0x43;
module_param(wdt_stop, int, 0);
MODULE_PARM_DESC(wdt_stop, "Acquire WDT 'stop' io port (default 0x43)");
-static int wdt_start = 0x443; /* You must set this - there is no sane way to probe for this board. */
+/* You must set this - there is no sane way to probe for this board. */
+static int wdt_start = 0x443;
module_param(wdt_start, int, 0);
MODULE_PARM_DESC(wdt_start, "Acquire WDT 'start' io port (default 0x443)");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* Watchdog Operations
@@ -112,18 +119,18 @@ static void acq_stop(void)
* /dev/watchdog handling
*/
-static ssize_t acq_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+static ssize_t acq_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
/* See if we got the magic character 'V' and reload the timer */
- if(count) {
+ if (count) {
if (!nowayout) {
size_t i;
-
/* note: just in case someone wrote the magic character
* five months ago... */
expect_close = 0;
-
- /* scan to see whether or not we got the magic character */
+ /* scan to see whether or not we got the
+ magic character */
for (i = 0; i != count; i++) {
char c;
if (get_user(c, buf + i))
@@ -132,64 +139,55 @@ static ssize_t acq_write(struct file *file, const char __user *buf, size_t count
expect_close = 42;
}
}
-
- /* Well, anyhow someone wrote to us, we should return that favour */
+ /* Well, anyhow someone wrote to us, we should
+ return that favour */
acq_keepalive();
}
return count;
}
-static int acq_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long acq_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
int options, retval = -EINVAL;
void __user *argp = (void __user *)arg;
int __user *p = argp;
- static struct watchdog_info ident =
- {
+ static struct watchdog_info ident = {
.options = WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
.firmware_version = 1,
.identity = WATCHDOG_NAME,
};
- switch(cmd)
- {
+ switch (cmd) {
case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
+ return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
+ return put_user(0, p);
case WDIOC_KEEPALIVE:
- acq_keepalive();
- return 0;
+ acq_keepalive();
+ return 0;
case WDIOC_GETTIMEOUT:
return put_user(WATCHDOG_HEARTBEAT, p);
case WDIOC_SETOPTIONS:
{
- if (get_user(options, p))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD)
- {
- acq_stop();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD)
- {
- acq_keepalive();
- retval = 0;
- }
-
- return retval;
+ if (get_user(options, p))
+ return -EFAULT;
+ if (options & WDIOS_DISABLECARD) {
+ acq_stop();
+ retval = 0;
+ }
+ if (options & WDIOS_ENABLECARD) {
+ acq_keepalive();
+ retval = 0;
+ }
+ return retval;
}
-
default:
- return -ENOTTY;
+ return -ENOTTY;
}
}
@@ -211,7 +209,8 @@ static int acq_close(struct inode *inode, struct file *file)
if (expect_close == 42) {
acq_stop();
} else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ printk(KERN_CRIT PFX
+ "Unexpected close, not stopping watchdog!\n");
acq_keepalive();
}
clear_bit(0, &acq_is_open);
@@ -227,7 +226,7 @@ static const struct file_operations acq_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = acq_write,
- .ioctl = acq_ioctl,
+ .unlocked_ioctl = acq_ioctl,
.open = acq_open,
.release = acq_close,
};
@@ -248,32 +247,29 @@ static int __devinit acq_probe(struct platform_device *dev)
if (wdt_stop != wdt_start) {
if (!request_region(wdt_stop, 1, WATCHDOG_NAME)) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_stop);
+ printk(KERN_ERR PFX
+ "I/O address 0x%04x already in use\n", wdt_stop);
ret = -EIO;
goto out;
}
}
if (!request_region(wdt_start, 1, WATCHDOG_NAME)) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
wdt_start);
ret = -EIO;
goto unreg_stop;
}
-
ret = misc_register(&acq_miscdev);
if (ret != 0) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
goto unreg_regions;
}
-
- printk (KERN_INFO PFX "initialized. (nowayout=%d)\n",
- nowayout);
+ printk(KERN_INFO PFX "initialized. (nowayout=%d)\n", nowayout);
return 0;
-
unreg_regions:
release_region(wdt_start, 1);
unreg_stop:
@@ -286,9 +282,9 @@ out:
static int __devexit acq_remove(struct platform_device *dev)
{
misc_deregister(&acq_miscdev);
- release_region(wdt_start,1);
- if(wdt_stop != wdt_start)
- release_region(wdt_stop,1);
+ release_region(wdt_start, 1);
+ if (wdt_stop != wdt_start)
+ release_region(wdt_stop, 1);
return 0;
}
@@ -313,18 +309,19 @@ static int __init acq_init(void)
{
int err;
- printk(KERN_INFO "WDT driver for Acquire single board computer initialising.\n");
+ printk(KERN_INFO
+ "WDT driver for Acquire single board computer initialising.\n");
err = platform_driver_register(&acquirewdt_driver);
if (err)
return err;
- acq_platform_device = platform_device_register_simple(DRV_NAME, -1, NULL, 0);
+ acq_platform_device = platform_device_register_simple(DRV_NAME,
+ -1, NULL, 0);
if (IS_ERR(acq_platform_device)) {
err = PTR_ERR(acq_platform_device);
goto unreg_platform_driver;
}
-
return 0;
unreg_platform_driver:
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 02/57] clean up and check advantech watchdog
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
2008-05-19 13:04 ` [PATCH 01/57] Clean acquirewdt and check for BKL dependancies Alan Cox
@ 2008-05-19 13:04 ` Alan Cox
2008-05-19 13:04 ` [PATCH 03/57] ali: watchdog locking and style Alan Cox
` (55 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:04 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
Clean up the advantech watchdog code and inspect for BKL problems
---
drivers/watchdog/advantechwdt.c | 133 ++++++++++++++++++---------------------
1 files changed, 61 insertions(+), 72 deletions(-)
diff --git a/drivers/watchdog/advantechwdt.c b/drivers/watchdog/advantechwdt.c
index 8121cc2..7597571 100644
--- a/drivers/watchdog/advantechwdt.c
+++ b/drivers/watchdog/advantechwdt.c
@@ -72,35 +72,35 @@ MODULE_PARM_DESC(wdt_start, "Advantech WDT 'start' io port (default 0x443)");
static int timeout = WATCHDOG_TIMEOUT; /* in seconds */
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=63, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds. 1<= timeout <=63, default="
+ __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* Watchdog Operations
*/
-static void
-advwdt_ping(void)
+static void advwdt_ping(void)
{
/* Write a watchdog value */
outb_p(timeout, wdt_start);
}
-static void
-advwdt_disable(void)
+static void advwdt_disable(void)
{
inb_p(wdt_stop);
}
-static int
-advwdt_set_heartbeat(int t)
+static int advwdt_set_heartbeat(int t)
{
- if ((t < 1) || (t > 63))
+ if (t < 1 || t > 63)
return -EINVAL;
-
timeout = t;
return 0;
}
@@ -109,8 +109,8 @@ advwdt_set_heartbeat(int t)
* /dev/watchdog handling
*/
-static ssize_t
-advwdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+static ssize_t advwdt_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
if (count) {
if (!nowayout) {
@@ -131,9 +131,7 @@ advwdt_write(struct file *file, const char __user *buf, size_t count, loff_t *pp
return count;
}
-static int
-advwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long advwdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
int new_timeout;
void __user *argp = (void __user *)arg;
@@ -146,57 +144,50 @@ advwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
switch (cmd) {
case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof(ident)))
- return -EFAULT;
- break;
+ if (copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ break;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
+ return put_user(0, p);
case WDIOC_KEEPALIVE:
- advwdt_ping();
- break;
+ advwdt_ping();
+ break;
case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, p))
- return -EFAULT;
- if (advwdt_set_heartbeat(new_timeout))
- return -EINVAL;
- advwdt_ping();
- /* Fall */
-
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+ if (advwdt_set_heartbeat(new_timeout))
+ return -EINVAL;
+ advwdt_ping();
+ /* Fall */
case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
-
+ return put_user(timeout, p);
case WDIOC_SETOPTIONS:
{
- int options, retval = -EINVAL;
-
- if (get_user(options, p))
- return -EFAULT;
+ int options, retval = -EINVAL;
- if (options & WDIOS_DISABLECARD) {
- advwdt_disable();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- advwdt_ping();
- retval = 0;
- }
-
- return retval;
+ if (get_user(options, p))
+ return -EFAULT;
+ if (options & WDIOS_DISABLECARD) {
+ advwdt_disable();
+ retval = 0;
+ }
+ if (options & WDIOS_ENABLECARD) {
+ advwdt_ping();
+ retval = 0;
+ }
+ return retval;
}
-
default:
- return -ENOTTY;
+ return -ENOTTY;
}
return 0;
}
-static int
-advwdt_open(struct inode *inode, struct file *file)
+static int advwdt_open(struct inode *inode, struct file *file)
{
if (test_and_set_bit(0, &advwdt_is_open))
return -EBUSY;
@@ -214,7 +205,8 @@ advwdt_close(struct inode *inode, struct file *file)
if (adv_expect_close == 42) {
advwdt_disable();
} else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ printk(KERN_CRIT PFX
+ "Unexpected close, not stopping watchdog!\n");
advwdt_ping();
}
clear_bit(0, &advwdt_is_open);
@@ -230,7 +222,7 @@ static const struct file_operations advwdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = advwdt_write,
- .ioctl = advwdt_ioctl,
+ .unlocked_ioctl = advwdt_ioctl,
.open = advwdt_open,
.release = advwdt_close,
};
@@ -245,23 +237,24 @@ static struct miscdevice advwdt_miscdev = {
* Init & exit routines
*/
-static int __devinit
-advwdt_probe(struct platform_device *dev)
+static int __devinit advwdt_probe(struct platform_device *dev)
{
int ret;
if (wdt_stop != wdt_start) {
if (!request_region(wdt_stop, 1, WATCHDOG_NAME)) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_stop);
+ printk (KERN_ERR PFX
+ "I/O address 0x%04x already in use\n",
+ wdt_stop);
ret = -EIO;
goto out;
}
}
if (!request_region(wdt_start, 1, WATCHDOG_NAME)) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_start);
+ printk (KERN_ERR PFX
+ "I/O address 0x%04x already in use\n",
+ wdt_start);
ret = -EIO;
goto unreg_stop;
}
@@ -269,20 +262,19 @@ advwdt_probe(struct platform_device *dev)
/* Check that the heartbeat value is within it's range ; if not reset to the default */
if (advwdt_set_heartbeat(timeout)) {
advwdt_set_heartbeat(WATCHDOG_TIMEOUT);
- printk (KERN_INFO PFX "timeout value must be 1<=x<=63, using %d\n",
- timeout);
+ printk (KERN_INFO PFX
+ "timeout value must be 1<=x<=63, using %d\n", timeout);
}
ret = misc_register(&advwdt_miscdev);
if (ret != 0) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ printk (KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
goto unreg_regions;
}
-
printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
timeout, nowayout);
-
out:
return ret;
unreg_regions:
@@ -293,8 +285,7 @@ unreg_stop:
goto out;
}
-static int __devexit
-advwdt_remove(struct platform_device *dev)
+static int __devexit advwdt_remove(struct platform_device *dev)
{
misc_deregister(&advwdt_miscdev);
release_region(wdt_start,1);
@@ -304,8 +295,7 @@ advwdt_remove(struct platform_device *dev)
return 0;
}
-static void
-advwdt_shutdown(struct platform_device *dev)
+static void advwdt_shutdown(struct platform_device *dev)
{
/* Turn the WDT off if we have a soft shutdown */
advwdt_disable();
@@ -321,8 +311,7 @@ static struct platform_driver advwdt_driver = {
},
};
-static int __init
-advwdt_init(void)
+static int __init advwdt_init(void)
{
int err;
@@ -332,7 +321,8 @@ advwdt_init(void)
if (err)
return err;
- advwdt_platform_device = platform_device_register_simple(DRV_NAME, -1, NULL, 0);
+ advwdt_platform_device = platform_device_register_simple(DRV_NAME,
+ -1, NULL, 0);
if (IS_ERR(advwdt_platform_device)) {
err = PTR_ERR(advwdt_platform_device);
goto unreg_platform_driver;
@@ -345,8 +335,7 @@ unreg_platform_driver:
return err;
}
-static void __exit
-advwdt_exit(void)
+static void __exit advwdt_exit(void)
{
platform_device_unregister(advwdt_platform_device);
platform_driver_unregister(&advwdt_driver);
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 03/57] ali: watchdog locking and style
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
2008-05-19 13:04 ` [PATCH 01/57] Clean acquirewdt and check for BKL dependancies Alan Cox
2008-05-19 13:04 ` [PATCH 02/57] clean up and check advantech watchdog Alan Cox
@ 2008-05-19 13:04 ` Alan Cox
2008-05-19 13:05 ` [PATCH 04/57] AR7 watchdog Alan Cox
` (54 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:04 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
Clean up and check locking
---
drivers/watchdog/alim1535_wdt.c | 186 ++++++++++++++++----------------
drivers/watchdog/alim7101_wdt.c | 224 +++++++++++++++++++++------------------
2 files changed, 209 insertions(+), 201 deletions(-)
diff --git a/drivers/watchdog/alim1535_wdt.c b/drivers/watchdog/alim1535_wdt.c
index 2b1fbdb..88760cb 100644
--- a/drivers/watchdog/alim1535_wdt.c
+++ b/drivers/watchdog/alim1535_wdt.c
@@ -19,8 +19,8 @@
#include <linux/fs.h>
#include <linux/pci.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
#define WATCHDOG_NAME "ALi_M1535"
#define PFX WATCHDOG_NAME ": "
@@ -30,17 +30,21 @@
static unsigned long ali_is_open;
static char ali_expect_release;
static struct pci_dev *ali_pci;
-static u32 ali_timeout_bits; /* stores the computed timeout */
+static u32 ali_timeout_bits; /* stores the computed timeout */
static DEFINE_SPINLOCK(ali_lock); /* Guards the hardware */
/* module parameters */
static int timeout = WATCHDOG_TIMEOUT;
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (0<timeout<18000, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds. (0 < timeout < 18000, default="
+ __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* ali_start - start watchdog countdown
@@ -103,15 +107,16 @@ static void ali_keepalive(void)
static int ali_settimer(int t)
{
- if(t < 0)
+ if (t < 0)
return -EINVAL;
- else if(t < 60)
+ else if (t < 60)
ali_timeout_bits = t|(1<<6);
- else if(t < 3600)
+ else if (t < 3600)
ali_timeout_bits = (t/60)|(1<<7);
- else if(t < 18000)
+ else if (t < 18000)
ali_timeout_bits = (t/300)|(1<<6)|(1<<7);
- else return -EINVAL;
+ else
+ return -EINVAL;
timeout = t;
return 0;
@@ -134,21 +139,22 @@ static int ali_settimer(int t)
*/
static ssize_t ali_write(struct file *file, const char __user *data,
- size_t len, loff_t * ppos)
+ size_t len, loff_t *ppos)
{
/* See if we got the magic character 'V' and reload the timer */
if (len) {
if (!nowayout) {
size_t i;
- /* note: just in case someone wrote the magic character
- * five months ago... */
+ /* note: just in case someone wrote the
+ magic character five months ago... */
ali_expect_release = 0;
- /* scan to see whether or not we got the magic character */
+ /* scan to see whether or not we got
+ the magic character */
for (i = 0; i != len; i++) {
char c;
- if(get_user(c, data+i))
+ if (get_user(c, data+i))
return -EFAULT;
if (c == 'V')
ali_expect_release = 42;
@@ -163,7 +169,6 @@ static ssize_t ali_write(struct file *file, const char __user *data,
/*
* ali_ioctl - handle watchdog ioctls
- * @inode: VFS inode
* @file: VFS file pointer
* @cmd: ioctl number
* @arg: arguments to the ioctl
@@ -172,8 +177,7 @@ static ssize_t ali_write(struct file *file, const char __user *data,
* we want an extension to enable irq ack monitoring and the like
*/
-static int ali_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long ali_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
@@ -186,57 +190,45 @@ static int ali_ioctl(struct inode *inode, struct file *file,
};
switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident,
- sizeof (ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- ali_keepalive();
- return 0;
-
- case WDIOC_SETOPTIONS:
- {
- int new_options, retval = -EINVAL;
-
- if (get_user (new_options, p))
- return -EFAULT;
-
- if (new_options & WDIOS_DISABLECARD) {
- ali_stop();
- retval = 0;
- }
-
- if (new_options & WDIOS_ENABLECARD) {
- ali_start();
- retval = 0;
- }
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
- return retval;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ ali_keepalive();
+ return 0;
+ case WDIOC_SETOPTIONS:
+ {
+ int new_options, retval = -EINVAL;
+
+ if (get_user(new_options, p))
+ return -EFAULT;
+ if (new_options & WDIOS_DISABLECARD) {
+ ali_stop();
+ retval = 0;
}
-
- case WDIOC_SETTIMEOUT:
- {
- int new_timeout;
-
- if (get_user(new_timeout, p))
- return -EFAULT;
-
- if (ali_settimer(new_timeout))
- return -EINVAL;
-
- ali_keepalive();
- /* Fall */
+ if (new_options & WDIOS_ENABLECARD) {
+ ali_start();
+ retval = 0;
}
-
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
-
- default:
- return -ENOTTY;
+ return retval;
+ }
+ case WDIOC_SETTIMEOUT:
+ {
+ int new_timeout;
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+ if (ali_settimer(new_timeout))
+ return -EINVAL;
+ ali_keepalive();
+ /* Fall */
+ }
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
+ default:
+ return -ENOTTY;
}
}
@@ -274,10 +266,11 @@ static int ali_release(struct inode *inode, struct file *file)
/*
* Shut off the timer.
*/
- if (ali_expect_release == 42) {
+ if (ali_expect_release == 42)
ali_stop();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ else {
+ printk(KERN_CRIT PFX
+ "Unexpected close, not stopping watchdog!\n");
ali_keepalive();
}
clear_bit(0, &ali_is_open);
@@ -292,13 +285,11 @@ static int ali_release(struct inode *inode, struct file *file)
*/
-static int ali_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
+static int ali_notify_sys(struct notifier_block *this,
+ unsigned long code, void *unused)
{
- if (code==SYS_DOWN || code==SYS_HALT) {
- /* Turn the WDT off */
- ali_stop();
- }
-
+ if (code == SYS_DOWN || code == SYS_HALT)
+ ali_stop(); /* Turn the WDT off */
return NOTIFY_DONE;
}
@@ -340,10 +331,10 @@ static int __init ali_find_watchdog(void)
/* Check for the a 7101 PMU */
pdev = pci_get_device(PCI_VENDOR_ID_AL, 0x7101, NULL);
- if(pdev == NULL)
+ if (pdev == NULL)
return -ENODEV;
- if(pci_enable_device(pdev)) {
+ if (pci_enable_device(pdev)) {
pci_dev_put(pdev);
return -EIO;
}
@@ -355,9 +346,12 @@ static int __init ali_find_watchdog(void)
*/
pci_read_config_dword(pdev, 0xCC, &wdog);
- wdog &= ~0x3F; /* Timer bits */
- wdog &= ~((1<<27)|(1<<26)|(1<<25)|(1<<24)); /* Issued events */
- wdog &= ~((1<<16)|(1<<13)|(1<<12)|(1<<11)|(1<<10)|(1<<9)); /* No monitor bits */
+ /* Timer bits */
+ wdog &= ~0x3F;
+ /* Issued events */
+ wdog &= ~((1<<27)|(1<<26)|(1<<25)|(1<<24));
+ /* No monitor bits */
+ wdog &= ~((1<<16)|(1<<13)|(1<<12)|(1<<11)|(1<<10)|(1<<9));
pci_write_config_dword(pdev, 0xCC, wdog);
@@ -369,12 +363,12 @@ static int __init ali_find_watchdog(void)
*/
static const struct file_operations ali_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = ali_write,
- .ioctl = ali_ioctl,
- .open = ali_open,
- .release = ali_release,
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = ali_write,
+ .unlocked_ioctl = ali_ioctl,
+ .open = ali_open,
+ .release = ali_release,
};
static struct miscdevice ali_miscdev = {
@@ -399,15 +393,16 @@ static int __init watchdog_init(void)
int ret;
/* Check whether or not the hardware watchdog is there */
- if (ali_find_watchdog() != 0) {
+ if (ali_find_watchdog() != 0)
return -ENODEV;
- }
- /* Check that the timeout value is within it's range ; if not reset to the default */
+ /* Check that the timeout value is within it's range;
+ if not reset to the default */
if (timeout < 1 || timeout >= 18000) {
timeout = WATCHDOG_TIMEOUT;
- printk(KERN_INFO PFX "timeout value must be 0<timeout<18000, using %d\n",
- timeout);
+ printk(KERN_INFO PFX
+ "timeout value must be 0 < timeout < 18000, using %d\n",
+ timeout);
}
/* Calculate the watchdog's timeout */
@@ -415,15 +410,16 @@ static int __init watchdog_init(void)
ret = register_reboot_notifier(&ali_notifier);
if (ret != 0) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", ret);
goto out;
}
ret = misc_register(&ali_miscdev);
if (ret != 0) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
goto unreg_reboot;
}
diff --git a/drivers/watchdog/alim7101_wdt.c b/drivers/watchdog/alim7101_wdt.c
index 238273c..c495f36 100644
--- a/drivers/watchdog/alim7101_wdt.c
+++ b/drivers/watchdog/alim7101_wdt.c
@@ -32,8 +32,8 @@
#include <linux/fs.h>
#include <linux/pci.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
#include <asm/system.h>
#define OUR_NAME "alim7101_wdt"
@@ -60,13 +60,17 @@
*/
#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */
-static int timeout = WATCHDOG_TIMEOUT; /* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
+/* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
+static int timeout = WATCHDOG_TIMEOUT;
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds. (1<=timeout<=3600, default="
+ __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
-static int use_gpio = 0; /* Use the pic (for a1d revision alim7101) */
+static int use_gpio; /* Use the pic (for a1d revision alim7101) */
module_param(use_gpio, int, 0);
-MODULE_PARM_DESC(use_gpio, "Use the gpio watchdog. (required by old cobalt boards)");
+MODULE_PARM_DESC(use_gpio,
+ "Use the gpio watchdog (required by old cobalt boards).");
static void wdt_timer_ping(unsigned long);
static DEFINE_TIMER(timer, wdt_timer_ping, 0, 1);
@@ -77,8 +81,9 @@ static struct pci_dev *alim7101_pmu;
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
- __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* Whack the dog
@@ -89,23 +94,26 @@ static void wdt_timer_ping(unsigned long data)
/* If we got a heartbeat pulse within the WDT_US_INTERVAL
* we agree to ping the WDT
*/
- char tmp;
+ char tmp;
- if(time_before(jiffies, next_heartbeat))
- {
+ if (time_before(jiffies, next_heartbeat)) {
/* Ping the WDT (this is actually a disarm/arm sequence) */
pci_read_config_byte(alim7101_pmu, 0x92, &tmp);
- pci_write_config_byte(alim7101_pmu, ALI_7101_WDT, (tmp & ~ALI_WDT_ARM));
- pci_write_config_byte(alim7101_pmu, ALI_7101_WDT, (tmp | ALI_WDT_ARM));
+ pci_write_config_byte(alim7101_pmu,
+ ALI_7101_WDT, (tmp & ~ALI_WDT_ARM));
+ pci_write_config_byte(alim7101_pmu,
+ ALI_7101_WDT, (tmp | ALI_WDT_ARM));
if (use_gpio) {
- pci_read_config_byte(alim7101_pmu, ALI_7101_GPIO_O, &tmp);
- pci_write_config_byte(alim7101_pmu, ALI_7101_GPIO_O, tmp
- | 0x20);
- pci_write_config_byte(alim7101_pmu, ALI_7101_GPIO_O, tmp
- & ~0x20);
+ pci_read_config_byte(alim7101_pmu,
+ ALI_7101_GPIO_O, &tmp);
+ pci_write_config_byte(alim7101_pmu,
+ ALI_7101_GPIO_O, tmp | 0x20);
+ pci_write_config_byte(alim7101_pmu,
+ ALI_7101_GPIO_O, tmp & ~0x20);
}
} else {
- printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
+ printk(KERN_WARNING PFX
+ "Heartbeat lost! Will not ping the watchdog\n");
}
/* Re-set the timer interval */
mod_timer(&timer, jiffies + WDT_INTERVAL);
@@ -121,17 +129,23 @@ static void wdt_change(int writeval)
pci_read_config_byte(alim7101_pmu, ALI_7101_WDT, &tmp);
if (writeval == WDT_ENABLE) {
- pci_write_config_byte(alim7101_pmu, ALI_7101_WDT, (tmp | ALI_WDT_ARM));
+ pci_write_config_byte(alim7101_pmu,
+ ALI_7101_WDT, (tmp | ALI_WDT_ARM));
if (use_gpio) {
- pci_read_config_byte(alim7101_pmu, ALI_7101_GPIO_O, &tmp);
- pci_write_config_byte(alim7101_pmu, ALI_7101_GPIO_O, tmp & ~0x20);
+ pci_read_config_byte(alim7101_pmu,
+ ALI_7101_GPIO_O, &tmp);
+ pci_write_config_byte(alim7101_pmu,
+ ALI_7101_GPIO_O, tmp & ~0x20);
}
} else {
- pci_write_config_byte(alim7101_pmu, ALI_7101_WDT, (tmp & ~ALI_WDT_ARM));
+ pci_write_config_byte(alim7101_pmu,
+ ALI_7101_WDT, (tmp & ~ALI_WDT_ARM));
if (use_gpio) {
- pci_read_config_byte(alim7101_pmu, ALI_7101_GPIO_O, &tmp);
- pci_write_config_byte(alim7101_pmu, ALI_7101_GPIO_O, tmp | 0x20);
+ pci_read_config_byte(alim7101_pmu,
+ ALI_7101_GPIO_O, &tmp);
+ pci_write_config_byte(alim7101_pmu,
+ ALI_7101_GPIO_O, tmp | 0x20);
}
}
}
@@ -169,10 +183,11 @@ static void wdt_keepalive(void)
* /dev/watchdog handling
*/
-static ssize_t fop_write(struct file * file, const char __user * buf, size_t count, loff_t * ppos)
+static ssize_t fop_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
/* See if we got the magic character 'V' and reload the timer */
- if(count) {
+ if (count) {
if (!nowayout) {
size_t ofs;
@@ -195,119 +210,116 @@ static ssize_t fop_write(struct file * file, const char __user * buf, size_t cou
return count;
}
-static int fop_open(struct inode * inode, struct file * file)
+static int fop_open(struct inode *inode, struct file *file)
{
/* Just in case we're already talking to someone... */
- if(test_and_set_bit(0, &wdt_is_open))
+ if (test_and_set_bit(0, &wdt_is_open))
return -EBUSY;
/* Good, fire up the show */
wdt_startup();
return nonseekable_open(inode, file);
}
-static int fop_close(struct inode * inode, struct file * file)
+static int fop_close(struct inode *inode, struct file *file)
{
- if(wdt_expect_close == 42)
+ if (wdt_expect_close == 42)
wdt_turnoff();
else {
/* wim: shouldn't there be a: del_timer(&timer); */
- printk(KERN_CRIT PFX "device file closed unexpectedly. Will not stop the WDT!\n");
+ printk(KERN_CRIT PFX
+ "device file closed unexpectedly. Will not stop the WDT!\n");
}
clear_bit(0, &wdt_is_open);
wdt_expect_close = 0;
return 0;
}
-static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+static long fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
- static struct watchdog_info ident =
- {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ static struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT
+ | WDIOF_MAGICCLOSE,
.firmware_version = 1,
.identity = "ALiM7101",
};
- switch(cmd)
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ wdt_keepalive();
+ return 0;
+ case WDIOC_SETOPTIONS:
{
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- wdt_keepalive();
- return 0;
- case WDIOC_SETOPTIONS:
- {
- int new_options, retval = -EINVAL;
-
- if(get_user(new_options, p))
- return -EFAULT;
-
- if(new_options & WDIOS_DISABLECARD) {
- wdt_turnoff();
- retval = 0;
- }
-
- if(new_options & WDIOS_ENABLECARD) {
- wdt_startup();
- retval = 0;
- }
+ int new_options, retval = -EINVAL;
- return retval;
+ if (get_user(new_options, p))
+ return -EFAULT;
+ if (new_options & WDIOS_DISABLECARD) {
+ wdt_turnoff();
+ retval = 0;
}
- case WDIOC_SETTIMEOUT:
- {
- int new_timeout;
-
- if(get_user(new_timeout, p))
- return -EFAULT;
-
- if(new_timeout < 1 || new_timeout > 3600) /* arbitrary upper limit */
- return -EINVAL;
-
- timeout = new_timeout;
- wdt_keepalive();
- /* Fall through */
+ if (new_options & WDIOS_ENABLECARD) {
+ wdt_startup();
+ retval = 0;
}
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
- default:
- return -ENOTTY;
+ return retval;
+ }
+ case WDIOC_SETTIMEOUT:
+ {
+ int new_timeout;
+
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+ /* arbitrary upper limit */
+ if (new_timeout < 1 || new_timeout > 3600)
+ return -EINVAL;
+ timeout = new_timeout;
+ wdt_keepalive();
+ /* Fall through */
+ }
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
+ default:
+ return -ENOTTY;
}
}
static const struct file_operations wdt_fops = {
- .owner= THIS_MODULE,
- .llseek= no_llseek,
- .write= fop_write,
- .open= fop_open,
- .release= fop_close,
- .ioctl= fop_ioctl,
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = fop_write,
+ .open = fop_open,
+ .release = fop_close,
+ .unlocked_ioctl = fop_ioctl,
};
static struct miscdevice wdt_miscdev = {
- .minor=WATCHDOG_MINOR,
- .name="watchdog",
- .fops=&wdt_fops,
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &wdt_fops,
};
/*
* Notifier for system down
*/
-static int wdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
+static int wdt_notify_sys(struct notifier_block *this,
+ unsigned long code, void *unused)
{
- if (code==SYS_DOWN || code==SYS_HALT)
+ if (code == SYS_DOWN || code == SYS_HALT)
wdt_turnoff();
- if (code==SYS_RESTART) {
+ if (code == SYS_RESTART) {
/*
- * Cobalt devices have no way of rebooting themselves other than
- * getting the watchdog to pull reset, so we restart the watchdog on
- * reboot with no heartbeat
+ * Cobalt devices have no way of rebooting themselves other
+ * than getting the watchdog to pull reset, so we restart the
+ * watchdog on reboot with no heartbeat
*/
wdt_change(WDT_ENABLE);
printk(KERN_INFO PFX "Watchdog timer is now enabled with no heartbeat - should reboot in ~1 second.\n");
@@ -320,8 +332,7 @@ static int wdt_notify_sys(struct notifier_block *this, unsigned long code, void
* turn the timebomb registers off.
*/
-static struct notifier_block wdt_notifier=
-{
+static struct notifier_block wdt_notifier = {
.notifier_call = wdt_notify_sys,
};
@@ -354,7 +365,8 @@ static int __init alim7101_wdt_init(void)
ali1543_south = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533,
NULL);
if (!ali1543_south) {
- printk(KERN_INFO PFX "ALi 1543 South-Bridge not present - WDT not set\n");
+ printk(KERN_INFO PFX
+ "ALi 1543 South-Bridge not present - WDT not set\n");
goto err_out;
}
pci_read_config_byte(ali1543_south, 0x5e, &tmp);
@@ -363,24 +375,25 @@ static int __init alim7101_wdt_init(void)
if (!use_gpio) {
printk(KERN_INFO PFX "Detected old alim7101 revision 'a1d'. If this is a cobalt board, set the 'use_gpio' module parameter.\n");
goto err_out;
- }
+ }
nowayout = 1;
} else if ((tmp & 0x1e) != 0x12 && (tmp & 0x1e) != 0x00) {
printk(KERN_INFO PFX "ALi 1543 South-Bridge does not have the correct revision number (???1001?) - WDT not set\n");
goto err_out;
}
- if(timeout < 1 || timeout > 3600) /* arbitrary upper limit */
- {
+ if (timeout < 1 || timeout > 3600) {
+ /* arbitrary upper limit */
timeout = WATCHDOG_TIMEOUT;
- printk(KERN_INFO PFX "timeout value must be 1<=x<=3600, using %d\n",
- timeout);
+ printk(KERN_INFO PFX
+ "timeout value must be 1 <= x <= 3600, using %d\n",
+ timeout);
}
rc = register_reboot_notifier(&wdt_notifier);
if (rc) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", rc);
goto err_out;
}
@@ -391,9 +404,8 @@ static int __init alim7101_wdt_init(void)
goto err_out_reboot;
}
- if (nowayout) {
+ if (nowayout)
__module_get(THIS_MODULE);
- }
printk(KERN_INFO PFX "WDT driver for ALi M7101 initialised. timeout=%d sec (nowayout=%d)\n",
timeout, nowayout);
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 04/57] AR7 watchdog
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (2 preceding siblings ...)
2008-05-19 13:04 ` [PATCH 03/57] ali: watchdog locking and style Alan Cox
@ 2008-05-19 13:05 ` Alan Cox
2008-05-19 13:05 ` [PATCH 05/57] atp watchdog Alan Cox
` (53 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:05 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
Fix locking
Use unlocked_ioctl
Remove semaphores
---
drivers/watchdog/ar7_wdt.c | 29 +++++++++++++++++------------
1 files changed, 17 insertions(+), 12 deletions(-)
diff --git a/drivers/watchdog/ar7_wdt.c b/drivers/watchdog/ar7_wdt.c
index 2eb48c0..673f8c0 100644
--- a/drivers/watchdog/ar7_wdt.c
+++ b/drivers/watchdog/ar7_wdt.c
@@ -69,7 +69,8 @@ struct ar7_wdt {
u32 prescale;
};
-static struct semaphore open_semaphore;
+static unsigned long wdt_is_open;
+static spinlock_t wdt_lock;
static unsigned expect_close;
/* XXX currently fixed, allows max margin ~68.72 secs */
@@ -154,8 +155,10 @@ static void ar7_wdt_update_margin(int new_margin)
u32 change;
change = new_margin * (ar7_vbus_freq() / prescale_value);
- if (change < 1) change = 1;
- if (change > 0xffff) change = 0xffff;
+ if (change < 1)
+ change = 1;
+ if (change > 0xffff)
+ change = 0xffff;
ar7_wdt_change(change);
margin = change * prescale_value / ar7_vbus_freq();
printk(KERN_INFO DRVNAME
@@ -179,7 +182,7 @@ static void ar7_wdt_disable_wdt(void)
static int ar7_wdt_open(struct inode *inode, struct file *file)
{
/* only allow one at a time */
- if (down_trylock(&open_semaphore))
+ if (test_and_set_bit(0, &wdt_is_open))
return -EBUSY;
ar7_wdt_enable_wdt();
expect_close = 0;
@@ -195,9 +198,7 @@ static int ar7_wdt_release(struct inode *inode, struct file *file)
"will not disable the watchdog timer\n");
else if (!nowayout)
ar7_wdt_disable_wdt();
-
- up(&open_semaphore);
-
+ clear_bit(0, &wdt_is_open);
return 0;
}
@@ -222,7 +223,9 @@ static ssize_t ar7_wdt_write(struct file *file, const char *data,
if (len) {
size_t i;
+ spin_lock(&wdt_lock);
ar7_wdt_kick(1);
+ spin_unlock(&wdt_lock);
expect_close = 0;
for (i = 0; i < len; ++i) {
@@ -237,8 +240,8 @@ static ssize_t ar7_wdt_write(struct file *file, const char *data,
return len;
}
-static int ar7_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long ar7_wdt_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
{
static struct watchdog_info ident = {
.identity = LONGNAME,
@@ -269,8 +272,10 @@ static int ar7_wdt_ioctl(struct inode *inode, struct file *file,
if (new_margin < 1)
return -EINVAL;
+ spin_lock(&wdt_lock);
ar7_wdt_update_margin(new_margin);
ar7_wdt_kick(1);
+ spin_unlock(&wdt_lock);
case WDIOC_GETTIMEOUT:
if (put_user(margin, (int *)arg))
@@ -282,7 +287,7 @@ static int ar7_wdt_ioctl(struct inode *inode, struct file *file,
static const struct file_operations ar7_wdt_fops = {
.owner = THIS_MODULE,
.write = ar7_wdt_write,
- .ioctl = ar7_wdt_ioctl,
+ .unlocked_ioctl = ar7_wdt_ioctl,
.open = ar7_wdt_open,
.release = ar7_wdt_release,
};
@@ -297,6 +302,8 @@ static int __init ar7_wdt_init(void)
{
int rc;
+ spin_lock_init(&wdt_lock);
+
ar7_wdt_get_regs();
if (!request_mem_region(ar7_regs_wdt, sizeof(struct ar7_wdt),
@@ -312,8 +319,6 @@ static int __init ar7_wdt_init(void)
ar7_wdt_prescale(prescale_value);
ar7_wdt_update_margin(margin);
- sema_init(&open_semaphore, 1);
-
rc = register_reboot_notifier(&ar7_wdt_notifier);
if (rc) {
printk(KERN_ERR DRVNAME
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 05/57] atp watchdog
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (3 preceding siblings ...)
2008-05-19 13:05 ` [PATCH 04/57] AR7 watchdog Alan Cox
@ 2008-05-19 13:05 ` Alan Cox
2008-05-19 13:05 ` [PATCH 06/57] at91: watchdog to unlocked_ioctl Alan Cox
` (52 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:05 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
Switch to unlocked_ioctl
---
drivers/watchdog/at32ap700x_wdt.c | 7 +++----
1 files changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/watchdog/at32ap700x_wdt.c b/drivers/watchdog/at32ap700x_wdt.c
index ae0fca5..c5dc5e9 100644
--- a/drivers/watchdog/at32ap700x_wdt.c
+++ b/drivers/watchdog/at32ap700x_wdt.c
@@ -212,8 +212,8 @@ static struct watchdog_info at32_wdt_info = {
/*
* Handle commands from user-space.
*/
-static int at32_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long at32_wdt_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
{
int ret = -ENOTTY;
int time;
@@ -298,7 +298,7 @@ static ssize_t at32_wdt_write(struct file *file, const char __user *data,
static const struct file_operations at32_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
- .ioctl = at32_wdt_ioctl,
+ .unlocked_ioctl = at32_wdt_ioctl,
.open = at32_wdt_open,
.release = at32_wdt_close,
.write = at32_wdt_write,
@@ -391,7 +391,6 @@ static int __exit at32_wdt_remove(struct platform_device *pdev)
wdt = NULL;
platform_set_drvdata(pdev, NULL);
}
-
return 0;
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 06/57] at91: watchdog to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (4 preceding siblings ...)
2008-05-19 13:05 ` [PATCH 05/57] atp watchdog Alan Cox
@ 2008-05-19 13:05 ` Alan Cox
2008-05-19 13:05 ` [PATCH 07/57] cpu5_wdt: switch " Alan Cox
` (51 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:05 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
Review and switch to unlocked_ioctl
---
drivers/watchdog/at91rm9200_wdt.c | 108 +++++++++++++++++++------------------
1 files changed, 54 insertions(+), 54 deletions(-)
diff --git a/drivers/watchdog/at91rm9200_wdt.c b/drivers/watchdog/at91rm9200_wdt.c
index 9ff9a95..bb79f64 100644
--- a/drivers/watchdog/at91rm9200_wdt.c
+++ b/drivers/watchdog/at91rm9200_wdt.c
@@ -20,7 +20,7 @@
#include <linux/platform_device.h>
#include <linux/types.h>
#include <linux/watchdog.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <asm/arch/at91_st.h>
@@ -31,11 +31,14 @@ static int wdt_time = WDT_DEFAULT_TIME;
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(wdt_time, int, 0);
-MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="__MODULE_STRING(WDT_DEFAULT_TIME) ")");
+MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="
+ __MODULE_STRING(WDT_DEFAULT_TIME) ")");
#ifdef CONFIG_WATCHDOG_NOWAYOUT
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
#endif
@@ -46,7 +49,7 @@ static unsigned long at91wdt_busy;
/*
* Disable the watchdog.
*/
-static void inline at91_wdt_stop(void)
+static inline void at91_wdt_stop(void)
{
at91_sys_write(AT91_ST_WDMR, AT91_ST_EXTEN);
}
@@ -54,16 +57,17 @@ static void inline at91_wdt_stop(void)
/*
* Enable and reset the watchdog.
*/
-static void inline at91_wdt_start(void)
+static inline void at91_wdt_start(void)
{
- at91_sys_write(AT91_ST_WDMR, AT91_ST_EXTEN | AT91_ST_RSTEN | (((65536 * wdt_time) >> 8) & AT91_ST_WDV));
+ at91_sys_write(AT91_ST_WDMR, AT91_ST_EXTEN | AT91_ST_RSTEN |
+ (((65536 * wdt_time) >> 8) & AT91_ST_WDV));
at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
}
/*
* Reload the watchdog timer. (ie, pat the watchdog)
*/
-static void inline at91_wdt_reload(void)
+static inline void at91_wdt_reload(void)
{
at91_sys_write(AT91_ST_CR, AT91_ST_WDRST);
}
@@ -89,8 +93,9 @@ static int at91_wdt_open(struct inode *inode, struct file *file)
*/
static int at91_wdt_close(struct inode *inode, struct file *file)
{
+ /* Disable the watchdog when file is closed */
if (!nowayout)
- at91_wdt_stop(); /* Disable the watchdog when file is closed */
+ at91_wdt_stop();
clear_bit(0, &at91wdt_busy);
return 0;
@@ -110,7 +115,8 @@ static int at91_wdt_settimeout(int new_time)
if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
return -EINVAL;
- /* Set new watchdog time. It will be used when at91_wdt_start() is called. */
+ /* Set new watchdog time. It will be used when
+ at91_wdt_start() is called. */
wdt_time = new_time;
return 0;
}
@@ -123,60 +129,52 @@ static struct watchdog_info at91_wdt_info = {
/*
* Handle commands from user-space.
*/
-static int at91_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long at91_wdt_ioct(struct file *file,
+ unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
int new_value;
- switch(cmd) {
- case WDIOC_KEEPALIVE:
- at91_wdt_reload(); /* pat the watchdog */
- return 0;
-
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &at91_wdt_info, sizeof(at91_wdt_info)) ? -EFAULT : 0;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_value, p))
- return -EFAULT;
-
- if (at91_wdt_settimeout(new_value))
- return -EINVAL;
-
- /* Enable new time value */
+ switch (cmd) {
+ case WDIOC_KEEPALIVE:
+ at91_wdt_reload(); /* pat the watchdog */
+ return 0;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &at91_wdt_info,
+ sizeof(at91_wdt_info)) ? -EFAULT : 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_value, p))
+ return -EFAULT;
+ if (at91_wdt_settimeout(new_value))
+ return -EINVAL;
+ /* Enable new time value */
+ at91_wdt_start();
+ /* Return current value */
+ return put_user(wdt_time, p);
+ case WDIOC_GETTIMEOUT:
+ return put_user(wdt_time, p);
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_SETOPTIONS:
+ if (get_user(new_value, p))
+ return -EFAULT;
+ if (new_value & WDIOS_DISABLECARD)
+ at91_wdt_stop();
+ if (new_value & WDIOS_ENABLECARD)
at91_wdt_start();
-
- /* Return current value */
- return put_user(wdt_time, p);
-
- case WDIOC_GETTIMEOUT:
- return put_user(wdt_time, p);
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_SETOPTIONS:
- if (get_user(new_value, p))
- return -EFAULT;
-
- if (new_value & WDIOS_DISABLECARD)
- at91_wdt_stop();
- if (new_value & WDIOS_ENABLECARD)
- at91_wdt_start();
- return 0;
-
- default:
- return -ENOTTY;
+ return 0;
+ default:
+ return -ENOTTY;
}
}
/*
* Pat the watchdog whenever device is written to.
*/
-static ssize_t at91_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+static ssize_t at91_wdt_write(struct file *file, const char *data,
+ size_t len, loff_t *ppos)
{
at91_wdt_reload(); /* pat the watchdog */
return len;
@@ -187,7 +185,7 @@ static ssize_t at91_wdt_write(struct file *file, const char *data, size_t len, l
static const struct file_operations at91wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
- .ioctl = at91_wdt_ioctl,
+ .unlocked_ioctl = at91_wdt_ioctl,
.open = at91_wdt_open,
.release = at91_wdt_close,
.write = at91_wdt_write,
@@ -211,7 +209,8 @@ static int __init at91wdt_probe(struct platform_device *pdev)
if (res)
return res;
- printk("AT91 Watchdog Timer enabled (%d seconds%s)\n", wdt_time, nowayout ? ", nowayout" : "");
+ printk(KERN_INFO "AT91 Watchdog Timer enabled (%d seconds%s)\n",
+ wdt_time, nowayout ? ", nowayout" : "");
return 0;
}
@@ -265,7 +264,8 @@ static struct platform_driver at91wdt_driver = {
static int __init at91_wdt_init(void)
{
- /* Check that the heartbeat value is within range; if not reset to the default */
+ /* Check that the heartbeat value is within range;
+ if not reset to the default */
if (at91_wdt_settimeout(wdt_time)) {
at91_wdt_settimeout(WDT_DEFAULT_TIME);
pr_info("at91_wdt: wdt_time value must be 1 <= wdt_time <= 256, using %d\n", wdt_time);
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 07/57] cpu5_wdt: switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (5 preceding siblings ...)
2008-05-19 13:05 ` [PATCH 06/57] at91: watchdog to unlocked_ioctl Alan Cox
@ 2008-05-19 13:05 ` Alan Cox
2008-05-19 13:05 ` [PATCH 08/57] davinci_wdt: unlocked_ioctl and check locking Alan Cox
` (50 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:05 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/cpu5wdt.c | 144 +++++++++++++++++++++-----------------------
1 files changed, 70 insertions(+), 74 deletions(-)
diff --git a/drivers/watchdog/cpu5wdt.c b/drivers/watchdog/cpu5wdt.c
index df72f90..ec324e5 100644
--- a/drivers/watchdog/cpu5wdt.c
+++ b/drivers/watchdog/cpu5wdt.c
@@ -30,16 +30,16 @@
#include <linux/timer.h>
#include <linux/completion.h>
#include <linux/jiffies.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
+#include <linux/io.h>
+#include <linux/uaccess.h>
#include <linux/watchdog.h>
/* adjustable parameters */
-static int verbose = 0;
+static int verbose;
static int port = 0x91;
static int ticks = 10000;
+static spinlock_t cpu5wdt_lock;
#define PFX "cpu5wdt: "
@@ -70,12 +70,13 @@ static struct {
static void cpu5wdt_trigger(unsigned long unused)
{
- if ( verbose > 2 )
+ if (verbose > 2)
printk(KERN_DEBUG PFX "trigger at %i ticks\n", ticks);
- if( cpu5wdt_device.running )
+ if (cpu5wdt_device.running)
ticks--;
+ spin_lock(&cpu5wdt_lock);
/* keep watchdog alive */
outb(1, port + CPU5WDT_TRIGGER_REG);
@@ -86,6 +87,7 @@ static void cpu5wdt_trigger(unsigned long unused)
/* ticks doesn't matter anyway */
complete(&cpu5wdt_device.stop);
}
+ spin_unlock(&cpu5wdt_lock);
}
@@ -93,14 +95,17 @@ static void cpu5wdt_reset(void)
{
ticks = cpu5wdt_device.default_ticks;
- if ( verbose )
+ if (verbose)
printk(KERN_DEBUG PFX "reset (%i ticks)\n", (int) ticks);
}
static void cpu5wdt_start(void)
{
- if ( !cpu5wdt_device.queue ) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&cpu5wdt_lock, flags);
+ if (!cpu5wdt_device.queue) {
cpu5wdt_device.queue = 1;
outb(0, port + CPU5WDT_TIME_A_REG);
outb(0, port + CPU5WDT_TIME_B_REG);
@@ -111,18 +116,20 @@ static void cpu5wdt_start(void)
}
/* if process dies, counter is not decremented */
cpu5wdt_device.running++;
+ spin_unlock_irqrestore(&cpu5wdt_lock, flags);
}
static int cpu5wdt_stop(void)
{
- if ( cpu5wdt_device.running )
- cpu5wdt_device.running = 0;
+ unsigned long flags;
+ spin_lock_irqsave(&cpu5wdt_lock, flags);
+ if (cpu5wdt_device.running)
+ cpu5wdt_device.running = 0;
ticks = cpu5wdt_device.default_ticks;
-
- if ( verbose )
+ spin_unlock_irqrestore(&cpu5wdt_lock, flags);
+ if (verbose)
printk(KERN_CRIT PFX "stop not possible\n");
-
return -EIO;
}
@@ -130,9 +137,8 @@ static int cpu5wdt_stop(void)
static int cpu5wdt_open(struct inode *inode, struct file *file)
{
- if ( test_and_set_bit(0, &cpu5wdt_device.inuse) )
+ if (test_and_set_bit(0, &cpu5wdt_device.inuse))
return -EBUSY;
-
return nonseekable_open(inode, file);
}
@@ -142,67 +148,58 @@ static int cpu5wdt_release(struct inode *inode, struct file *file)
return 0;
}
-static int cpu5wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+static long cpu5wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
void __user *argp = (void __user *)arg;
+ int __user *p = argp;
unsigned int value;
- static struct watchdog_info ident =
- {
+ static struct watchdog_info ident = {
.options = WDIOF_CARDRESET,
.identity = "CPU5 WDT",
};
- switch(cmd) {
- case WDIOC_KEEPALIVE:
- cpu5wdt_reset();
- break;
- case WDIOC_GETSTATUS:
- value = inb(port + CPU5WDT_STATUS_REG);
- value = (value >> 2) & 1;
- if ( copy_to_user(argp, &value, sizeof(int)) )
- return -EFAULT;
- break;
- case WDIOC_GETBOOTSTATUS:
- if ( copy_to_user(argp, &value, sizeof(int)) )
- return -EFAULT;
- break;
- case WDIOC_GETSUPPORT:
- if ( copy_to_user(argp, &ident, sizeof(ident)) )
- return -EFAULT;
- break;
- case WDIOC_SETOPTIONS:
- if ( copy_from_user(&value, argp, sizeof(int)) )
- return -EFAULT;
- switch(value) {
- case WDIOS_ENABLECARD:
- cpu5wdt_start();
- break;
- case WDIOS_DISABLECARD:
- return cpu5wdt_stop();
- default:
- return -EINVAL;
- }
- break;
- default:
- return -ENOTTY;
+ switch (cmd) {
+ case WDIOC_KEEPALIVE:
+ cpu5wdt_reset();
+ break;
+ case WDIOC_GETSTATUS:
+ value = inb(port + CPU5WDT_STATUS_REG);
+ value = (value >> 2) & 1;
+ return put_user(value, p);
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ break;
+ case WDIOC_SETOPTIONS:
+ if (get_user(value, p))
+ return -EFAULT;
+ if (value & WDIOS_ENABLECARD)
+ cpu5wdt_start();
+ if (value & WDIOS_DISABLECARD)
+ cpu5wdt_stop();
+ break;
+ default:
+ return -ENOTTY;
}
return 0;
}
-static ssize_t cpu5wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+static ssize_t cpu5wdt_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
- if ( !count )
+ if (!count)
return -EIO;
-
cpu5wdt_reset();
-
return count;
}
static const struct file_operations cpu5wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
- .ioctl = cpu5wdt_ioctl,
+ .unlocked_ioctl = cpu5wdt_ioctl,
.open = cpu5wdt_open,
.write = cpu5wdt_write,
.release = cpu5wdt_release,
@@ -221,37 +218,36 @@ static int __devinit cpu5wdt_init(void)
unsigned int val;
int err;
- if ( verbose )
- printk(KERN_DEBUG PFX "port=0x%x, verbose=%i\n", port, verbose);
+ if (verbose)
+ printk(KERN_DEBUG PFX
+ "port=0x%x, verbose=%i\n", port, verbose);
- if ( !request_region(port, CPU5WDT_EXTENT, PFX) ) {
+ init_completion(&cpu5wdt_device.stop);
+ spin_lock_init(&cpu5wdt_lock);
+ cpu5wdt_device.queue = 0;
+ setup_timer(&cpu5wdt_device.timer, cpu5wdt_trigger, 0);
+ cpu5wdt_device.default_ticks = ticks;
+
+ if (!request_region(port, CPU5WDT_EXTENT, PFX)) {
printk(KERN_ERR PFX "request_region failed\n");
err = -EBUSY;
goto no_port;
}
- if ( (err = misc_register(&cpu5wdt_misc)) < 0 ) {
- printk(KERN_ERR PFX "misc_register failed\n");
- goto no_misc;
- }
-
/* watchdog reboot? */
val = inb(port + CPU5WDT_STATUS_REG);
val = (val >> 2) & 1;
- if ( !val )
+ if (!val)
printk(KERN_INFO PFX "sorry, was my fault\n");
- init_completion(&cpu5wdt_device.stop);
- cpu5wdt_device.queue = 0;
-
- clear_bit(0, &cpu5wdt_device.inuse);
-
- setup_timer(&cpu5wdt_device.timer, cpu5wdt_trigger, 0);
+ err = misc_register(&cpu5wdt_misc);
+ if (err < 0) {
+ printk(KERN_ERR PFX "misc_register failed\n");
+ goto no_misc;
+ }
- cpu5wdt_device.default_ticks = ticks;
printk(KERN_INFO PFX "init success\n");
-
return 0;
no_misc:
@@ -267,7 +263,7 @@ static int __devinit cpu5wdt_init_module(void)
static void __devexit cpu5wdt_exit(void)
{
- if ( cpu5wdt_device.queue ) {
+ if (cpu5wdt_device.queue) {
cpu5wdt_device.queue = 0;
wait_for_completion(&cpu5wdt_device.stop);
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 08/57] davinci_wdt: unlocked_ioctl and check locking
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (6 preceding siblings ...)
2008-05-19 13:05 ` [PATCH 07/57] cpu5_wdt: switch " Alan Cox
@ 2008-05-19 13:05 ` Alan Cox
2008-05-19 13:05 ` [PATCH 09/57] ep93xx_wdt: unlocked_ioctl Alan Cox
` (49 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:05 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/davinci_wdt.c | 11 +++++------
1 files changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/watchdog/davinci_wdt.c b/drivers/watchdog/davinci_wdt.c
index 1782c79..926b59c 100644
--- a/drivers/watchdog/davinci_wdt.c
+++ b/drivers/watchdog/davinci_wdt.c
@@ -22,10 +22,10 @@
#include <linux/bitops.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
#include <asm/hardware.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
#define MODULE_NAME "DAVINCI-WDT: "
@@ -143,9 +143,8 @@ static struct watchdog_info ident = {
.identity = "DaVinci Watchdog",
};
-static int
-davinci_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long davinci_wdt_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
{
int ret = -ENOTTY;
@@ -184,7 +183,7 @@ static const struct file_operations davinci_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = davinci_wdt_write,
- .ioctl = davinci_wdt_ioctl,
+ .unlocked_ioctl = davinci_wdt_ioctl,
.open = davinci_wdt_open,
.release = davinci_wdt_release,
};
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 09/57] ep93xx_wdt: unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (7 preceding siblings ...)
2008-05-19 13:05 ` [PATCH 08/57] davinci_wdt: unlocked_ioctl and check locking Alan Cox
@ 2008-05-19 13:05 ` Alan Cox
2008-05-19 13:05 ` [PATCH 10/57] eurotechwdt: unlocked_ioctl, code lock check and tidy Alan Cox
` (48 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:05 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/ep93xx_wdt.c | 17 +++++++++--------
1 files changed, 9 insertions(+), 8 deletions(-)
diff --git a/drivers/watchdog/ep93xx_wdt.c b/drivers/watchdog/ep93xx_wdt.c
index 0e4787a..cdcdd11 100644
--- a/drivers/watchdog/ep93xx_wdt.c
+++ b/drivers/watchdog/ep93xx_wdt.c
@@ -28,9 +28,9 @@
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
#include <linux/timer.h>
+#include <linux/uaccess.h>
#include <asm/hardware.h>
-#include <asm/uaccess.h>
#define WDT_VERSION "0.3"
#define PFX "ep93xx_wdt: "
@@ -136,9 +136,8 @@ static struct watchdog_info ident = {
.identity = "EP93xx Watchdog",
};
-static int
-ep93xx_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long ep93xx_wdt_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
{
int ret = -ENOTTY;
@@ -174,8 +173,8 @@ static int ep93xx_wdt_release(struct inode *inode, struct file *file)
if (test_bit(WDT_OK_TO_CLOSE, &wdt_status))
wdt_shutdown();
else
- printk(KERN_CRIT PFX "Device closed unexpectedly - "
- "timer will not stop\n");
+ printk(KERN_CRIT PFX
+ "Device closed unexpectedly - timer will not stop\n");
clear_bit(WDT_IN_USE, &wdt_status);
clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
@@ -186,7 +185,7 @@ static int ep93xx_wdt_release(struct inode *inode, struct file *file)
static const struct file_operations ep93xx_wdt_fops = {
.owner = THIS_MODULE,
.write = ep93xx_wdt_write,
- .ioctl = ep93xx_wdt_ioctl,
+ .unlocked_ioctl = ep93xx_wdt_ioctl,
.open = ep93xx_wdt_open,
.release = ep93xx_wdt_release,
};
@@ -243,7 +242,9 @@ module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds. (1<=timeout<=3600, default="
+ __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
MODULE_AUTHOR("Ray Lehtiniemi <rayl@mail.com>,"
"Alessandro Zummo <a.zummo@towertech.it>");
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 10/57] eurotechwdt: unlocked_ioctl, code lock check and tidy
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (8 preceding siblings ...)
2008-05-19 13:05 ` [PATCH 09/57] ep93xx_wdt: unlocked_ioctl Alan Cox
@ 2008-05-19 13:05 ` Alan Cox
2008-05-19 13:05 ` [PATCH 11/57] hpwdt: couple of include cleanups Alan Cox
` (47 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:05 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/eurotechwdt.c | 57 +++++++++++++++++++++++++---------------
1 files changed, 36 insertions(+), 21 deletions(-)
diff --git a/drivers/watchdog/eurotechwdt.c b/drivers/watchdog/eurotechwdt.c
index b14e9d1..b94e6ef 100644
--- a/drivers/watchdog/eurotechwdt.c
+++ b/drivers/watchdog/eurotechwdt.c
@@ -56,14 +56,15 @@
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
static unsigned long eurwdt_is_open;
static int eurwdt_timeout;
static char eur_expect_close;
+static spinlock_t eurwdt_lock;
/*
* You must set these - there is no sane way to probe for this board.
@@ -78,7 +79,9 @@ static char *ev = "int";
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* Some symbolic names
@@ -137,7 +140,8 @@ static void eurwdt_activate_timer(void)
{
eurwdt_disable_timer();
eurwdt_write_reg(WDT_CTRL_REG, 0x01); /* activate the WDT */
- eurwdt_write_reg(WDT_OUTPIN_CFG, !strcmp("int", ev) ? WDT_EVENT_INT : WDT_EVENT_REBOOT);
+ eurwdt_write_reg(WDT_OUTPIN_CFG,
+ !strcmp("int", ev) ? WDT_EVENT_INT : WDT_EVENT_REBOOT);
/* Setting interrupt line */
if (irq == 2 || irq > 15 || irq < 0) {
@@ -206,21 +210,21 @@ size_t count, loff_t *ppos)
for (i = 0; i != count; i++) {
char c;
- if(get_user(c, buf+i))
+ if (get_user(c, buf+i))
return -EFAULT;
if (c == 'V')
eur_expect_close = 42;
}
}
+ spin_lock(&eurwdt_lock);
eurwdt_ping(); /* the default timeout */
+ spin_unlock(&eurwdt_lock);
}
-
return count;
}
/**
* eurwdt_ioctl:
- * @inode: inode of the device
* @file: file handle to the device
* @cmd: watchdog command
* @arg: argument pointer
@@ -229,13 +233,14 @@ size_t count, loff_t *ppos)
* according to their available features.
*/
-static int eurwdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long eurwdt_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT
+ | WDIOF_MAGICCLOSE,
.firmware_version = 1,
.identity = "WDT Eurotech CPU-1220/1410",
};
@@ -243,7 +248,7 @@ static int eurwdt_ioctl(struct inode *inode, struct file *file,
int time;
int options, retval = -EINVAL;
- switch(cmd) {
+ switch (cmd) {
default:
return -ENOTTY;
@@ -255,7 +260,9 @@ static int eurwdt_ioctl(struct inode *inode, struct file *file,
return put_user(0, p);
case WDIOC_KEEPALIVE:
+ spin_lock(&eurwdt_lock);
eurwdt_ping();
+ spin_unlock(&eurwdt_lock);
return 0;
case WDIOC_SETTIMEOUT:
@@ -266,8 +273,10 @@ static int eurwdt_ioctl(struct inode *inode, struct file *file,
if (time < 0 || time > 255)
return -EINVAL;
+ spin_lock(&eurwdt_lock);
eurwdt_timeout = time;
eurwdt_set_timeout(time);
+ spin_unlock(&eurwdt_lock);
/* Fall */
case WDIOC_GETTIMEOUT:
@@ -276,6 +285,7 @@ static int eurwdt_ioctl(struct inode *inode, struct file *file,
case WDIOC_SETOPTIONS:
if (get_user(options, p))
return -EFAULT;
+ spin_lock(&eurwdt_lock);
if (options & WDIOS_DISABLECARD) {
eurwdt_disable_timer();
retval = 0;
@@ -285,6 +295,7 @@ static int eurwdt_ioctl(struct inode *inode, struct file *file,
eurwdt_ping();
retval = 0;
}
+ spin_unlock(&eurwdt_lock);
return retval;
}
}
@@ -322,10 +333,11 @@ static int eurwdt_open(struct inode *inode, struct file *file)
static int eurwdt_release(struct inode *inode, struct file *file)
{
- if (eur_expect_close == 42) {
+ if (eur_expect_close == 42)
eurwdt_disable_timer();
- } else {
- printk(KERN_CRIT "eurwdt: Unexpected close, not stopping watchdog!\n");
+ else {
+ printk(KERN_CRIT
+ "eurwdt: Unexpected close, not stopping watchdog!\n");
eurwdt_ping();
}
clear_bit(0, &eurwdt_is_open);
@@ -362,11 +374,11 @@ static int eurwdt_notify_sys(struct notifier_block *this, unsigned long code,
static const struct file_operations eurwdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = eurwdt_write,
- .ioctl = eurwdt_ioctl,
- .open = eurwdt_open,
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = eurwdt_write,
+ .unlocked_ioctl = eurwdt_ioctl,
+ .open = eurwdt_open,
.release = eurwdt_release,
};
@@ -419,7 +431,7 @@ static int __init eurwdt_init(void)
int ret;
ret = request_irq(irq, eurwdt_interrupt, IRQF_DISABLED, "eurwdt", NULL);
- if(ret) {
+ if (ret) {
printk(KERN_ERR "eurwdt: IRQ %d is not free.\n", irq);
goto out;
}
@@ -432,10 +444,13 @@ static int __init eurwdt_init(void)
ret = register_reboot_notifier(&eurwdt_notifier);
if (ret) {
- printk(KERN_ERR "eurwdt: can't register reboot notifier (err=%d)\n", ret);
+ printk(KERN_ERR
+ "eurwdt: can't register reboot notifier (err=%d)\n", ret);
goto outreg;
}
+ spin_lock_init(&eurwdt_lock);
+
ret = misc_register(&eurwdt_miscdev);
if (ret) {
printk(KERN_ERR "eurwdt: can't misc_register on minor=%d\n",
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 11/57] hpwdt: couple of include cleanups
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (9 preceding siblings ...)
2008-05-19 13:05 ` [PATCH 10/57] eurotechwdt: unlocked_ioctl, code lock check and tidy Alan Cox
@ 2008-05-19 13:05 ` Alan Cox
2008-05-19 13:05 ` [PATCH 12/57] ib700wdt: clean up and switch to unlocked_ioctl Alan Cox
` (46 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:05 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/hpwdt.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c
index 6483d10..ca1dc99 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -39,9 +39,9 @@
#include <linux/string.h>
#include <linux/bootmem.h>
#include <linux/slab.h>
-#include <asm/dmi.h>
+#include <linux/dmi.h>
#include <asm/desc.h>
-#include <asm/kdebug.h>
+#include <linux/kdebug.h>
#define PCI_BIOS32_SD_VALUE 0x5F32335F /* "_32_" */
#define CRU_BIOS_SIGNATURE_VALUE 0x55524324
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 12/57] ib700wdt: clean up and switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (10 preceding siblings ...)
2008-05-19 13:05 ` [PATCH 11/57] hpwdt: couple of include cleanups Alan Cox
@ 2008-05-19 13:05 ` Alan Cox
2008-05-19 13:05 ` [PATCH 13/57] i6300esb: Style, unlocked_ioctl, cleanup Alan Cox
` (45 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:05 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/ib700wdt.c | 103 ++++++++++++++++++++++---------------------
1 files changed, 52 insertions(+), 51 deletions(-)
diff --git a/drivers/watchdog/ib700wdt.c b/drivers/watchdog/ib700wdt.c
index 4b89f40..805a54b 100644
--- a/drivers/watchdog/ib700wdt.c
+++ b/drivers/watchdog/ib700wdt.c
@@ -42,8 +42,8 @@
#include <linux/moduleparam.h>
#include <linux/platform_device.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
#include <asm/system.h>
static struct platform_device *ibwdt_platform_device;
@@ -120,7 +120,9 @@ static int wd_margin = WD_TIMO;
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
@@ -165,8 +167,8 @@ ibwdt_set_heartbeat(int t)
* /dev/watchdog handling
*/
-static ssize_t
-ibwdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+static ssize_t ibwdt_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
if (count) {
if (!nowayout) {
@@ -188,77 +190,71 @@ ibwdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppo
return count;
}
-static int
-ibwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long ibwdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
int new_margin;
void __user *argp = (void __user *)arg;
int __user *p = argp;
static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT
+ | WDIOF_MAGICCLOSE,
.firmware_version = 1,
.identity = "IB700 WDT",
};
switch (cmd) {
case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof(ident)))
- return -EFAULT;
- break;
+ if (copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ break;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
+ return put_user(0, p);
case WDIOC_KEEPALIVE:
- ibwdt_ping();
- break;
+ ibwdt_ping();
+ break;
case WDIOC_SETTIMEOUT:
- if (get_user(new_margin, p))
- return -EFAULT;
- if (ibwdt_set_heartbeat(new_margin))
- return -EINVAL;
- ibwdt_ping();
- /* Fall */
+ if (get_user(new_margin, p))
+ return -EFAULT;
+ if (ibwdt_set_heartbeat(new_margin))
+ return -EINVAL;
+ ibwdt_ping();
+ /* Fall */
case WDIOC_GETTIMEOUT:
- return put_user(wd_times[wd_margin], p);
+ return put_user(wd_times[wd_margin], p);
case WDIOC_SETOPTIONS:
{
- int options, retval = -EINVAL;
+ int options, retval = -EINVAL;
- if (get_user(options, p))
- return -EFAULT;
+ if (get_user(options, p))
+ return -EFAULT;
- if (options & WDIOS_DISABLECARD) {
- ibwdt_disable();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- ibwdt_ping();
- retval = 0;
- }
-
- return retval;
+ if (options & WDIOS_DISABLECARD) {
+ ibwdt_disable();
+ retval = 0;
+ }
+ if (options & WDIOS_ENABLECARD) {
+ ibwdt_ping();
+ retval = 0;
+ }
+ return retval;
}
-
default:
- return -ENOTTY;
+ return -ENOTTY;
}
return 0;
}
-static int
-ibwdt_open(struct inode *inode, struct file *file)
+static int ibwdt_open(struct inode *inode, struct file *file)
{
- if (test_and_set_bit(0, &ibwdt_is_open)) {
+ if (test_and_set_bit(0, &ibwdt_is_open))
return -EBUSY;
- }
if (nowayout)
__module_get(THIS_MODULE);
@@ -273,7 +269,8 @@ ibwdt_close(struct inode *inode, struct file *file)
if (expect_close == 42) {
ibwdt_disable();
} else {
- printk(KERN_CRIT PFX "WDT device closed unexpectedly. WDT will not stop!\n");
+ printk(KERN_CRIT PFX
+ "WDT device closed unexpectedly. WDT will not stop!\n");
ibwdt_ping();
}
clear_bit(0, &ibwdt_is_open);
@@ -289,7 +286,7 @@ static const struct file_operations ibwdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = ibwdt_write,
- .ioctl = ibwdt_ioctl,
+ .unlocked_ioctl = ibwdt_ioctl,
.open = ibwdt_open,
.release = ibwdt_close,
};
@@ -310,21 +307,23 @@ static int __devinit ibwdt_probe(struct platform_device *dev)
#if WDT_START != WDT_STOP
if (!request_region(WDT_STOP, 1, "IB700 WDT")) {
- printk (KERN_ERR PFX "STOP method I/O %X is not available.\n", WDT_STOP);
+ printk(KERN_ERR PFX "STOP method I/O %X is not available.\n",
+ WDT_STOP);
res = -EIO;
goto out_nostopreg;
}
#endif
if (!request_region(WDT_START, 1, "IB700 WDT")) {
- printk (KERN_ERR PFX "START method I/O %X is not available.\n", WDT_START);
+ printk(KERN_ERR PFX "START method I/O %X is not available.\n",
+ WDT_START);
res = -EIO;
goto out_nostartreg;
}
res = misc_register(&ibwdt_miscdev);
if (res) {
- printk (KERN_ERR PFX "failed to register misc device\n");
+ printk(KERN_ERR PFX "failed to register misc device\n");
goto out_nomisc;
}
return 0;
@@ -342,9 +341,9 @@ out_nostopreg:
static int __devexit ibwdt_remove(struct platform_device *dev)
{
misc_deregister(&ibwdt_miscdev);
- release_region(WDT_START,1);
+ release_region(WDT_START, 1);
#if WDT_START != WDT_STOP
- release_region(WDT_STOP,1);
+ release_region(WDT_STOP, 1);
#endif
return 0;
}
@@ -369,13 +368,15 @@ static int __init ibwdt_init(void)
{
int err;
- printk(KERN_INFO PFX "WDT driver for IB700 single board computer initialising.\n");
+ printk(KERN_INFO PFX
+ "WDT driver for IB700 single board computer initialising.\n");
err = platform_driver_register(&ibwdt_driver);
if (err)
return err;
- ibwdt_platform_device = platform_device_register_simple(DRV_NAME, -1, NULL, 0);
+ ibwdt_platform_device = platform_device_register_simple(DRV_NAME,
+ -1, NULL, 0);
if (IS_ERR(ibwdt_platform_device)) {
err = PTR_ERR(ibwdt_platform_device);
goto unreg_platform_driver;
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 13/57] i6300esb: Style, unlocked_ioctl, cleanup
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (11 preceding siblings ...)
2008-05-19 13:05 ` [PATCH 12/57] ib700wdt: clean up and switch to unlocked_ioctl Alan Cox
@ 2008-05-19 13:05 ` Alan Cox
2008-05-19 13:06 ` [PATCH 14/57] ibmasr: coding style, locking verify Alan Cox
` (44 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:05 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/i6300esb.c | 342 +++++++++++++++++++++----------------------
1 files changed, 167 insertions(+), 175 deletions(-)
diff --git a/drivers/watchdog/i6300esb.c b/drivers/watchdog/i6300esb.c
index ca44fd9..b7e1419 100644
--- a/drivers/watchdog/i6300esb.c
+++ b/drivers/watchdog/i6300esb.c
@@ -38,9 +38,8 @@
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/ioport.h>
-
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
/* Module and version information */
#define ESB_VERSION "0.03"
@@ -59,17 +58,17 @@
#define ESB_RELOAD_REG BASEADDR + 0x0c /* Reload register */
/* Lock register bits */
-#define ESB_WDT_FUNC ( 0x01 << 2 ) /* Watchdog functionality */
-#define ESB_WDT_ENABLE ( 0x01 << 1 ) /* Enable WDT */
-#define ESB_WDT_LOCK ( 0x01 << 0 ) /* Lock (nowayout) */
+#define ESB_WDT_FUNC (0x01 << 2) /* Watchdog functionality */
+#define ESB_WDT_ENABLE (0x01 << 1) /* Enable WDT */
+#define ESB_WDT_LOCK (0x01 << 0) /* Lock (nowayout) */
/* Config register bits */
-#define ESB_WDT_REBOOT ( 0x01 << 5 ) /* Enable reboot on timeout */
-#define ESB_WDT_FREQ ( 0x01 << 2 ) /* Decrement frequency */
-#define ESB_WDT_INTTYPE ( 0x11 << 0 ) /* Interrupt type on timer1 timeout */
+#define ESB_WDT_REBOOT (0x01 << 5) /* Enable reboot on timeout */
+#define ESB_WDT_FREQ (0x01 << 2) /* Decrement frequency */
+#define ESB_WDT_INTTYPE (0x11 << 0) /* Interrupt type on timer1 timeout */
/* Reload register bits */
-#define ESB_WDT_RELOAD ( 0x01 << 8 ) /* prevent timeout */
+#define ESB_WDT_RELOAD (0x01 << 8) /* prevent timeout */
/* Magic constants */
#define ESB_UNLOCK1 0x80 /* Step 1 to unlock reset registers */
@@ -84,14 +83,20 @@ static unsigned short triggered; /* The status of the watchdog upon boot */
static char esb_expect_close;
/* module parameters */
-#define WATCHDOG_HEARTBEAT 30 /* 30 sec default heartbeat (1<heartbeat<2*1023) */
+/* 30 sec default heartbeat (1 < heartbeat < 2*1023) */
+#define WATCHDOG_HEARTBEAT 30
static int heartbeat = WATCHDOG_HEARTBEAT; /* in seconds */
+
module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (1<heartbeat<2046, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
+MODULE_PARM_DESC(heartbeat,
+ "Watchdog heartbeat in seconds. (1<heartbeat<2046, default="
+ __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* Some i6300ESB specific functions
@@ -104,8 +109,8 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" _
* to once before they need to be unlocked again.
*/
static inline void esb_unlock_registers(void) {
- writeb(ESB_UNLOCK1, ESB_RELOAD_REG);
- writeb(ESB_UNLOCK2, ESB_RELOAD_REG);
+ writeb(ESB_UNLOCK1, ESB_RELOAD_REG);
+ writeb(ESB_UNLOCK2, ESB_RELOAD_REG);
}
static void esb_timer_start(void)
@@ -114,8 +119,7 @@ static void esb_timer_start(void)
/* Enable or Enable + Lock? */
val = 0x02 | (nowayout ? 0x01 : 0x00);
-
- pci_write_config_byte(esb_pci, ESB_LOCK_REG, val);
+ pci_write_config_byte(esb_pci, ESB_LOCK_REG, val);
}
static int esb_timer_stop(void)
@@ -140,7 +144,7 @@ static void esb_timer_keepalive(void)
spin_lock(&esb_lock);
esb_unlock_registers();
writew(ESB_WDT_RELOAD, ESB_RELOAD_REG);
- /* FIXME: Do we need to flush anything here? */
+ /* FIXME: Do we need to flush anything here? */
spin_unlock(&esb_lock);
}
@@ -167,7 +171,7 @@ static int esb_timer_set_heartbeat(int time)
esb_unlock_registers();
writel(val, ESB_TIMER2_REG);
- /* Reload */
+ /* Reload */
esb_unlock_registers();
writew(ESB_WDT_RELOAD, ESB_RELOAD_REG);
@@ -179,54 +183,55 @@ static int esb_timer_set_heartbeat(int time)
return 0;
}
-static int esb_timer_read (void)
+static int esb_timer_read(void)
{
- u32 count;
+ u32 count;
/* This isn't documented, and doesn't take into
- * acount which stage is running, but it looks
- * like a 20 bit count down, so we might as well report it.
- */
- pci_read_config_dword(esb_pci, 0x64, &count);
- return (int)count;
+ * acount which stage is running, but it looks
+ * like a 20 bit count down, so we might as well report it.
+ */
+ pci_read_config_dword(esb_pci, 0x64, &count);
+ return (int)count;
}
/*
* /dev/watchdog handling
*/
-static int esb_open (struct inode *inode, struct file *file)
+static int esb_open(struct inode *inode, struct file *file)
{
- /* /dev/watchdog can only be opened once */
- if (test_and_set_bit(0, &timer_alive))
- return -EBUSY;
+ /* /dev/watchdog can only be opened once */
+ if (test_and_set_bit(0, &timer_alive))
+ return -EBUSY;
- /* Reload and activate timer */
- esb_timer_keepalive ();
- esb_timer_start ();
+ /* Reload and activate timer */
+ esb_timer_keepalive();
+ esb_timer_start();
return nonseekable_open(inode, file);
}
-static int esb_release (struct inode *inode, struct file *file)
+static int esb_release(struct inode *inode, struct file *file)
{
- /* Shut off the timer. */
- if (esb_expect_close == 42) {
- esb_timer_stop ();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
- esb_timer_keepalive ();
- }
- clear_bit(0, &timer_alive);
- esb_expect_close = 0;
- return 0;
+ /* Shut off the timer. */
+ if (esb_expect_close == 42)
+ esb_timer_stop();
+ else {
+ printk(KERN_CRIT PFX
+ "Unexpected close, not stopping watchdog!\n");
+ esb_timer_keepalive();
+ }
+ clear_bit(0, &timer_alive);
+ esb_expect_close = 0;
+ return 0;
}
-static ssize_t esb_write (struct file *file, const char __user *data,
- size_t len, loff_t * ppos)
+static ssize_t esb_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
{
/* See if we got the magic character 'V' and reload the timer */
- if (len) {
+ if (len) {
if (!nowayout) {
size_t i;
@@ -237,7 +242,7 @@ static ssize_t esb_write (struct file *file, const char __user *data,
/* scan to see whether or not we got the magic character */
for (i = 0; i != len; i++) {
char c;
- if(get_user(c, data+i))
+ if (get_user(c, data+i))
return -EFAULT;
if (c == 'V')
esb_expect_close = 42;
@@ -245,13 +250,12 @@ static ssize_t esb_write (struct file *file, const char __user *data,
}
/* someone wrote to us, we should reload the timer */
- esb_timer_keepalive ();
+ esb_timer_keepalive();
}
return len;
}
-static int esb_ioctl (struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long esb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
int new_options, retval = -EINVAL;
int new_heartbeat;
@@ -266,71 +270,65 @@ static int esb_ioctl (struct inode *inode, struct file *file,
};
switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident,
- sizeof (ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- return put_user (esb_timer_read(), p);
-
- case WDIOC_GETBOOTSTATUS:
- return put_user (triggered, p);
-
- case WDIOC_KEEPALIVE:
- esb_timer_keepalive ();
- return 0;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
- case WDIOC_SETOPTIONS:
- {
- if (get_user (new_options, p))
- return -EFAULT;
+ case WDIOC_GETSTATUS:
+ return put_user(esb_timer_read(), p);
- if (new_options & WDIOS_DISABLECARD) {
- esb_timer_stop ();
- retval = 0;
- }
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(triggered, p);
- if (new_options & WDIOS_ENABLECARD) {
- esb_timer_keepalive ();
- esb_timer_start ();
- retval = 0;
- }
+ case WDIOC_KEEPALIVE:
+ esb_timer_keepalive();
+ return 0;
- return retval;
- }
+ case WDIOC_SETOPTIONS:
+ {
+ if (get_user(new_options, p))
+ return -EFAULT;
- case WDIOC_SETTIMEOUT:
- {
- if (get_user(new_heartbeat, p))
- return -EFAULT;
-
- if (esb_timer_set_heartbeat(new_heartbeat))
- return -EINVAL;
-
- esb_timer_keepalive ();
- /* Fall */
- }
-
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, p);
+ if (new_options & WDIOS_DISABLECARD) {
+ esb_timer_stop();
+ retval = 0;
+ }
- default:
- return -ENOTTY;
- }
+ if (new_options & WDIOS_ENABLECARD) {
+ esb_timer_keepalive();
+ esb_timer_start();
+ retval = 0;
+ }
+ return retval;
+ }
+ case WDIOC_SETTIMEOUT:
+ {
+ if (get_user(new_heartbeat, p))
+ return -EFAULT;
+ if (esb_timer_set_heartbeat(new_heartbeat))
+ return -EINVAL;
+ esb_timer_keepalive();
+ /* Fall */
+ }
+ case WDIOC_GETTIMEOUT:
+ return put_user(heartbeat, p);
+ default:
+ return -ENOTTY;
+ }
}
/*
* Notify system
*/
-static int esb_notify_sys (struct notifier_block *this, unsigned long code, void *unused)
+static int esb_notify_sys(struct notifier_block *this,
+ unsigned long code, void *unused)
{
- if (code==SYS_DOWN || code==SYS_HALT) {
- /* Turn the WDT off */
- esb_timer_stop ();
- }
-
- return NOTIFY_DONE;
+ if (code == SYS_DOWN || code == SYS_HALT) {
+ /* Turn the WDT off */
+ esb_timer_stop();
+ }
+ return NOTIFY_DONE;
}
/*
@@ -338,22 +336,22 @@ static int esb_notify_sys (struct notifier_block *this, unsigned long code, void
*/
static const struct file_operations esb_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = esb_write,
- .ioctl = esb_ioctl,
- .open = esb_open,
- .release = esb_release,
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = esb_write,
+ .unlocked_ioctl = esb_ioctl,
+ .open = esb_open,
+ .release = esb_release,
};
static struct miscdevice esb_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &esb_fops,
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &esb_fops,
};
static struct notifier_block esb_notifier = {
- .notifier_call = esb_notify_sys,
+ .notifier_call = esb_notify_sys,
};
/*
@@ -365,50 +363,44 @@ static struct notifier_block esb_notifier = {
* want to register another driver on the same PCI id.
*/
static struct pci_device_id esb_pci_tbl[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_9), },
- { 0, }, /* End of list */
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_9), },
+ { 0, }, /* End of list */
};
-MODULE_DEVICE_TABLE (pci, esb_pci_tbl);
+MODULE_DEVICE_TABLE(pci, esb_pci_tbl);
/*
* Init & exit routines
*/
-static unsigned char __init esb_getdevice (void)
+static unsigned char __init esb_getdevice(void)
{
u8 val1;
unsigned short val2;
+ /*
+ * Find the PCI device
+ */
- struct pci_dev *dev = NULL;
- /*
- * Find the PCI device
- */
-
- for_each_pci_dev(dev) {
- if (pci_match_id(esb_pci_tbl, dev)) {
- esb_pci = dev;
- break;
- }
- }
+ esb_pci = pci_get_device(PCI_VENDOR_ID_INTEL,
+ PCI_DEVICE_ID_INTEL_ESB_9, NULL);
- if (esb_pci) {
- if (pci_enable_device(esb_pci)) {
- printk (KERN_ERR PFX "failed to enable device\n");
+ if (esb_pci) {
+ if (pci_enable_device(esb_pci)) {
+ printk(KERN_ERR PFX "failed to enable device\n");
goto err_devput;
}
if (pci_request_region(esb_pci, 0, ESB_MODULE_NAME)) {
- printk (KERN_ERR PFX "failed to request region\n");
+ printk(KERN_ERR PFX "failed to request region\n");
goto err_disable;
}
BASEADDR = ioremap(pci_resource_start(esb_pci, 0),
pci_resource_len(esb_pci, 0));
if (BASEADDR == NULL) {
- /* Something's wrong here, BASEADDR has to be set */
- printk (KERN_ERR PFX "failed to get BASEADDR\n");
- goto err_release;
- }
+ /* Something's wrong here, BASEADDR has to be set */
+ printk(KERN_ERR PFX "failed to get BASEADDR\n");
+ goto err_release;
+ }
/*
* The watchdog has two timers, it can be setup so that the
@@ -425,7 +417,7 @@ static unsigned char __init esb_getdevice (void)
/* Check that the WDT isn't already locked */
pci_read_config_byte(esb_pci, ESB_LOCK_REG, &val1);
if (val1 & ESB_WDT_LOCK)
- printk (KERN_WARNING PFX "nowayout already set\n");
+ printk(KERN_WARNING PFX "nowayout already set\n");
/* Set the timer to watchdog mode and disable it for now */
pci_write_config_byte(esb_pci, ESB_LOCK_REG, 0x00);
@@ -452,44 +444,44 @@ err_devput:
return 0;
}
-static int __init watchdog_init (void)
+static int __init watchdog_init(void)
{
- int ret;
-
- /* Check whether or not the hardware watchdog is there */
- if (!esb_getdevice () || esb_pci == NULL)
- return -ENODEV;
-
- /* Check that the heartbeat value is within it's range ; if not reset to the default */
- if (esb_timer_set_heartbeat (heartbeat)) {
- esb_timer_set_heartbeat (WATCHDOG_HEARTBEAT);
- printk(KERN_INFO PFX "heartbeat value must be 1<heartbeat<2046, using %d\n",
- heartbeat);
- }
-
- ret = register_reboot_notifier(&esb_notifier);
- if (ret != 0) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
- goto err_unmap;
- }
-
- ret = misc_register(&esb_miscdev);
- if (ret != 0) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
- goto err_notifier;
- }
-
- esb_timer_stop ();
-
- printk (KERN_INFO PFX "initialized (0x%p). heartbeat=%d sec (nowayout=%d)\n",
- BASEADDR, heartbeat, nowayout);
+ int ret;
+
+ /* Check whether or not the hardware watchdog is there */
+ if (!esb_getdevice() || esb_pci == NULL)
+ return -ENODEV;
+
+ /* Check that the heartbeat value is within it's range;
+ if not reset to the default */
+ if (esb_timer_set_heartbeat(heartbeat)) {
+ esb_timer_set_heartbeat(WATCHDOG_HEARTBEAT);
+ printk(KERN_INFO PFX
+ "heartbeat value must be 1<heartbeat<2046, using %d\n",
+ heartbeat);
+ }
+ ret = register_reboot_notifier(&esb_notifier);
+ if (ret != 0) {
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", ret);
+ goto err_unmap;
+ }
- return 0;
+ ret = misc_register(&esb_miscdev);
+ if (ret != 0) {
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
+ goto err_notifier;
+ }
+ esb_timer_stop();
+ printk(KERN_INFO PFX
+ "initialized (0x%p). heartbeat=%d sec (nowayout=%d)\n",
+ BASEADDR, heartbeat, nowayout);
+ return 0;
err_notifier:
- unregister_reboot_notifier(&esb_notifier);
+ unregister_reboot_notifier(&esb_notifier);
err_unmap:
iounmap(BASEADDR);
/* err_release: */
@@ -498,18 +490,18 @@ err_unmap:
pci_disable_device(esb_pci);
/* err_devput: */
pci_dev_put(esb_pci);
- return ret;
+ return ret;
}
-static void __exit watchdog_cleanup (void)
+static void __exit watchdog_cleanup(void)
{
/* Stop the timer before we leave */
if (!nowayout)
- esb_timer_stop ();
+ esb_timer_stop();
/* Deregister */
misc_deregister(&esb_miscdev);
- unregister_reboot_notifier(&esb_notifier);
+ unregister_reboot_notifier(&esb_notifier);
iounmap(BASEADDR);
pci_release_region(esb_pci, 0);
pci_disable_device(esb_pci);
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 14/57] ibmasr: coding style, locking verify
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (12 preceding siblings ...)
2008-05-19 13:05 ` [PATCH 13/57] i6300esb: Style, unlocked_ioctl, cleanup Alan Cox
@ 2008-05-19 13:06 ` Alan Cox
2008-05-20 5:52 ` Andrey Panin
2008-05-19 13:06 ` [PATCH 15/57] indydog: Clean up and tidy Alan Cox
` (43 subsequent siblings)
57 siblings, 1 reply; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:06 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
There is a new #if 0 section here which is a suggested fix for the horrible
PCI hack in the existing code. Would be good if someone with a box that uses
this device could test it.
---
drivers/watchdog/ibmasr.c | 149 ++++++++++++++++++++++++++-------------------
1 files changed, 87 insertions(+), 62 deletions(-)
diff --git a/drivers/watchdog/ibmasr.c b/drivers/watchdog/ibmasr.c
index 94155f6..6824bf8 100644
--- a/drivers/watchdog/ibmasr.c
+++ b/drivers/watchdog/ibmasr.c
@@ -19,9 +19,8 @@
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
#include <linux/dmi.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
enum {
@@ -70,10 +69,13 @@ static char asr_expect_close;
static unsigned int asr_type, asr_base, asr_length;
static unsigned int asr_read_addr, asr_write_addr;
static unsigned char asr_toggle_mask, asr_disable_mask;
+static spinlock_t asr_lock;
-static void asr_toggle(void)
+static void __asr_toggle(void)
{
- unsigned char reg = inb(asr_read_addr);
+ unsigned char reg;
+
+ reg = inb(asr_read_addr);
outb(reg & ~asr_toggle_mask, asr_write_addr);
reg = inb(asr_read_addr);
@@ -83,12 +85,21 @@ static void asr_toggle(void)
outb(reg & ~asr_toggle_mask, asr_write_addr);
reg = inb(asr_read_addr);
+ spin_unlock(&asr_lock);
+}
+
+static void asr_toggle(void)
+{
+ spin_lock(&asr_lock);
+ __asr_toggle();
+ spin_unlock(&asr_lock);
}
static void asr_enable(void)
{
unsigned char reg;
+ spin_lock(&asr_lock);
if (asr_type == ASMTYPE_TOPAZ) {
/* asr_write_addr == asr_read_addr */
reg = inb(asr_read_addr);
@@ -99,17 +110,21 @@ static void asr_enable(void)
* First make sure the hardware timer is reset by toggling
* ASR hardware timer line.
*/
- asr_toggle();
+ __asr_toggle();
reg = inb(asr_read_addr);
outb(reg & ~asr_disable_mask, asr_write_addr);
}
reg = inb(asr_read_addr);
+ spin_unlock(&asr_lock);
}
static void asr_disable(void)
{
- unsigned char reg = inb(asr_read_addr);
+ unsigned char reg;
+
+ spin_lock(&asr_lock);
+ reg = inb(asr_read_addr);
if (asr_type == ASMTYPE_TOPAZ)
/* asr_write_addr == asr_read_addr */
@@ -122,6 +137,7 @@ static void asr_disable(void)
outb(reg | asr_disable_mask, asr_write_addr);
}
reg = inb(asr_read_addr);
+ spin_unlock(&asr_lock);
}
static int __init asr_get_base_address(void)
@@ -133,7 +149,8 @@ static int __init asr_get_base_address(void)
switch (asr_type) {
case ASMTYPE_TOPAZ:
- /* SELECT SuperIO CHIP FOR QUERYING (WRITE 0x07 TO BOTH 0x2E and 0x2F) */
+ /* SELECT SuperIO CHIP FOR QUERYING
+ (WRITE 0x07 TO BOTH 0x2E and 0x2F) */
outb(0x07, 0x2e);
outb(0x07, 0x2f);
@@ -154,14 +171,26 @@ static int __init asr_get_base_address(void)
case ASMTYPE_JASPER:
type = "Jaspers ";
-
- /* FIXME: need to use pci_config_lock here, but it's not exported */
+#if 0
+ u32 r;
+ /* Suggested fix */
+ pdev = pci_get_bus_and_slot(0, DEVFN(0x1f, 0));
+ if (pdev == NULL)
+ return -ENODEV;
+ pci_read_config_dword(pdev, 0x58, &r);
+ asr_base = r & 0xFFFE;
+ pci_dev_put(pdev);
+#else
+ /* FIXME: need to use pci_config_lock here,
+ but it's not exported */
/* spin_lock_irqsave(&pci_config_lock, flags);*/
/* Select the SuperIO chip in the PCI I/O port register */
outl(0x8000f858, 0xcf8);
+ /* BUS 0, Slot 1F, fnc 0, offset 58 */
+
/*
* Read the base address for the SuperIO chip.
* Only the lower 16 bits are valid, but the address is word
@@ -170,7 +199,7 @@ static int __init asr_get_base_address(void)
asr_base = inl(0xcfc) & 0xfffe;
/* spin_unlock_irqrestore(&pci_config_lock, flags);*/
-
+#endif
asr_read_addr = asr_write_addr =
asr_base + JASPER_ASR_REG_OFFSET;
asr_toggle_mask = JASPER_ASR_TOGGLE_MASK;
@@ -241,11 +270,10 @@ static ssize_t asr_write(struct file *file, const char __user *buf,
return count;
}
-static int asr_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long asr_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
static const struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING |
+ .options = WDIOF_KEEPALIVEPING |
WDIOF_MAGICCLOSE,
.identity = "IBM ASR"
};
@@ -254,53 +282,45 @@ static int asr_ioctl(struct inode *inode, struct file *file,
int heartbeat;
switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident)) ?
- -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ asr_toggle();
+ return 0;
+ /*
+ * The hardware has a fixed timeout value, so no WDIOC_SETTIMEOUT
+ * and WDIOC_GETTIMEOUT always returns 256.
+ */
+ case WDIOC_GETTIMEOUT:
+ heartbeat = 256;
+ return put_user(heartbeat, p);
+ case WDIOC_SETOPTIONS:
+ {
+ int new_options, retval = -EINVAL;
+ if (get_user(new_options, p))
+ return -EFAULT;
+ if (new_options & WDIOS_DISABLECARD) {
+ asr_disable();
+ retval = 0;
+ }
+ if (new_options & WDIOS_ENABLECARD) {
+ asr_enable();
asr_toggle();
- return 0;
-
- /*
- * The hardware has a fixed timeout value, so no WDIOC_SETTIMEOUT
- * and WDIOC_GETTIMEOUT always returns 256.
- */
- case WDIOC_GETTIMEOUT:
- heartbeat = 256;
- return put_user(heartbeat, p);
-
- case WDIOC_SETOPTIONS: {
- int new_options, retval = -EINVAL;
-
- if (get_user(new_options, p))
- return -EFAULT;
-
- if (new_options & WDIOS_DISABLECARD) {
- asr_disable();
- retval = 0;
- }
-
- if (new_options & WDIOS_ENABLECARD) {
- asr_enable();
- asr_toggle();
- retval = 0;
- }
-
- return retval;
+ retval = 0;
}
+ return retval;
+ }
+ default:
+ return -ENOTTY;
}
-
- return -ENOTTY;
}
static int asr_open(struct inode *inode, struct file *file)
{
- if(test_and_set_bit(0, &asr_is_open))
+ if (test_and_set_bit(0, &asr_is_open))
return -EBUSY;
asr_toggle();
@@ -314,7 +334,8 @@ static int asr_release(struct inode *inode, struct file *file)
if (asr_expect_close == 42)
asr_disable();
else {
- printk(KERN_CRIT PFX "unexpected close, not stopping watchdog!\n");
+ printk(KERN_CRIT PFX
+ "unexpected close, not stopping watchdog!\n");
asr_toggle();
}
clear_bit(0, &asr_is_open);
@@ -323,12 +344,12 @@ static int asr_release(struct inode *inode, struct file *file)
}
static const struct file_operations asr_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = asr_write,
- .ioctl = asr_ioctl,
- .open = asr_open,
- .release = asr_release,
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = asr_write,
+ .unlocked_ioctl = asr_ioctl,
+ .open = asr_open,
+ .release = asr_release,
};
static struct miscdevice asr_miscdev = {
@@ -367,6 +388,8 @@ static int __init ibmasr_init(void)
if (!asr_type)
return -ENODEV;
+ spin_lock_init(&asr_lock);
+
rc = asr_get_base_address();
if (rc)
return rc;
@@ -395,7 +418,9 @@ module_init(ibmasr_init);
module_exit(ibmasr_exit);
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
MODULE_DESCRIPTION("IBM Automatic Server Restart driver");
MODULE_AUTHOR("Andrey Panin");
^ permalink raw reply related [flat|nested] 72+ messages in thread* Re: [PATCH 14/57] ibmasr: coding style, locking verify
2008-05-19 13:06 ` [PATCH 14/57] ibmasr: coding style, locking verify Alan Cox
@ 2008-05-20 5:52 ` Andrey Panin
0 siblings, 0 replies; 72+ messages in thread
From: Andrey Panin @ 2008-05-20 5:52 UTC (permalink / raw)
To: Alan Cox; +Cc: akpm, linux-kernel, wim
[-- Attachment #1: Type: text/plain, Size: 9128 bytes --]
On 140, 05 19, 2008 at 02:06:03PM +0100, Alan Cox wrote:
> From: Alan Cox <alan@redhat.com>
>
> There is a new #if 0 section here which is a suggested fix for the horrible
> PCI hack in the existing code. Would be good if someone with a box that uses
> this device could test it.
Patch looks good, thank you. I'll test it as soon as I can. I need to find
unused IBM server first :)
Unfortunately I don't have suitable machine to test the suggested fix.
> ---
>
> drivers/watchdog/ibmasr.c | 149 ++++++++++++++++++++++++++-------------------
> 1 files changed, 87 insertions(+), 62 deletions(-)
>
>
> diff --git a/drivers/watchdog/ibmasr.c b/drivers/watchdog/ibmasr.c
> index 94155f6..6824bf8 100644
> --- a/drivers/watchdog/ibmasr.c
> +++ b/drivers/watchdog/ibmasr.c
> @@ -19,9 +19,8 @@
> #include <linux/miscdevice.h>
> #include <linux/watchdog.h>
> #include <linux/dmi.h>
> -
> -#include <asm/io.h>
> -#include <asm/uaccess.h>
> +#include <linux/io.h>
> +#include <linux/uaccess.h>
>
>
> enum {
> @@ -70,10 +69,13 @@ static char asr_expect_close;
> static unsigned int asr_type, asr_base, asr_length;
> static unsigned int asr_read_addr, asr_write_addr;
> static unsigned char asr_toggle_mask, asr_disable_mask;
> +static spinlock_t asr_lock;
>
> -static void asr_toggle(void)
> +static void __asr_toggle(void)
> {
> - unsigned char reg = inb(asr_read_addr);
> + unsigned char reg;
> +
> + reg = inb(asr_read_addr);
>
> outb(reg & ~asr_toggle_mask, asr_write_addr);
> reg = inb(asr_read_addr);
> @@ -83,12 +85,21 @@ static void asr_toggle(void)
>
> outb(reg & ~asr_toggle_mask, asr_write_addr);
> reg = inb(asr_read_addr);
> + spin_unlock(&asr_lock);
> +}
> +
> +static void asr_toggle(void)
> +{
> + spin_lock(&asr_lock);
> + __asr_toggle();
> + spin_unlock(&asr_lock);
> }
>
> static void asr_enable(void)
> {
> unsigned char reg;
>
> + spin_lock(&asr_lock);
> if (asr_type == ASMTYPE_TOPAZ) {
> /* asr_write_addr == asr_read_addr */
> reg = inb(asr_read_addr);
> @@ -99,17 +110,21 @@ static void asr_enable(void)
> * First make sure the hardware timer is reset by toggling
> * ASR hardware timer line.
> */
> - asr_toggle();
> + __asr_toggle();
>
> reg = inb(asr_read_addr);
> outb(reg & ~asr_disable_mask, asr_write_addr);
> }
> reg = inb(asr_read_addr);
> + spin_unlock(&asr_lock);
> }
>
> static void asr_disable(void)
> {
> - unsigned char reg = inb(asr_read_addr);
> + unsigned char reg;
> +
> + spin_lock(&asr_lock);
> + reg = inb(asr_read_addr);
>
> if (asr_type == ASMTYPE_TOPAZ)
> /* asr_write_addr == asr_read_addr */
> @@ -122,6 +137,7 @@ static void asr_disable(void)
> outb(reg | asr_disable_mask, asr_write_addr);
> }
> reg = inb(asr_read_addr);
> + spin_unlock(&asr_lock);
> }
>
> static int __init asr_get_base_address(void)
> @@ -133,7 +149,8 @@ static int __init asr_get_base_address(void)
>
> switch (asr_type) {
> case ASMTYPE_TOPAZ:
> - /* SELECT SuperIO CHIP FOR QUERYING (WRITE 0x07 TO BOTH 0x2E and 0x2F) */
> + /* SELECT SuperIO CHIP FOR QUERYING
> + (WRITE 0x07 TO BOTH 0x2E and 0x2F) */
> outb(0x07, 0x2e);
> outb(0x07, 0x2f);
>
> @@ -154,14 +171,26 @@ static int __init asr_get_base_address(void)
>
> case ASMTYPE_JASPER:
> type = "Jaspers ";
> -
> - /* FIXME: need to use pci_config_lock here, but it's not exported */
> +#if 0
> + u32 r;
> + /* Suggested fix */
> + pdev = pci_get_bus_and_slot(0, DEVFN(0x1f, 0));
> + if (pdev == NULL)
> + return -ENODEV;
> + pci_read_config_dword(pdev, 0x58, &r);
> + asr_base = r & 0xFFFE;
> + pci_dev_put(pdev);
> +#else
> + /* FIXME: need to use pci_config_lock here,
> + but it's not exported */
>
> /* spin_lock_irqsave(&pci_config_lock, flags);*/
>
> /* Select the SuperIO chip in the PCI I/O port register */
> outl(0x8000f858, 0xcf8);
>
> + /* BUS 0, Slot 1F, fnc 0, offset 58 */
> +
> /*
> * Read the base address for the SuperIO chip.
> * Only the lower 16 bits are valid, but the address is word
> @@ -170,7 +199,7 @@ static int __init asr_get_base_address(void)
> asr_base = inl(0xcfc) & 0xfffe;
>
> /* spin_unlock_irqrestore(&pci_config_lock, flags);*/
> -
> +#endif
> asr_read_addr = asr_write_addr =
> asr_base + JASPER_ASR_REG_OFFSET;
> asr_toggle_mask = JASPER_ASR_TOGGLE_MASK;
> @@ -241,11 +270,10 @@ static ssize_t asr_write(struct file *file, const char __user *buf,
> return count;
> }
>
> -static int asr_ioctl(struct inode *inode, struct file *file,
> - unsigned int cmd, unsigned long arg)
> +static long asr_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
> {
> static const struct watchdog_info ident = {
> - .options = WDIOF_KEEPALIVEPING |
> + .options = WDIOF_KEEPALIVEPING |
> WDIOF_MAGICCLOSE,
> .identity = "IBM ASR"
> };
> @@ -254,53 +282,45 @@ static int asr_ioctl(struct inode *inode, struct file *file,
> int heartbeat;
>
> switch (cmd) {
> - case WDIOC_GETSUPPORT:
> - return copy_to_user(argp, &ident, sizeof(ident)) ?
> - -EFAULT : 0;
> -
> - case WDIOC_GETSTATUS:
> - case WDIOC_GETBOOTSTATUS:
> - return put_user(0, p);
> -
> - case WDIOC_KEEPALIVE:
> + case WDIOC_GETSUPPORT:
> + return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
> + case WDIOC_GETSTATUS:
> + case WDIOC_GETBOOTSTATUS:
> + return put_user(0, p);
> + case WDIOC_KEEPALIVE:
> + asr_toggle();
> + return 0;
> + /*
> + * The hardware has a fixed timeout value, so no WDIOC_SETTIMEOUT
> + * and WDIOC_GETTIMEOUT always returns 256.
> + */
> + case WDIOC_GETTIMEOUT:
> + heartbeat = 256;
> + return put_user(heartbeat, p);
> + case WDIOC_SETOPTIONS:
> + {
> + int new_options, retval = -EINVAL;
> + if (get_user(new_options, p))
> + return -EFAULT;
> + if (new_options & WDIOS_DISABLECARD) {
> + asr_disable();
> + retval = 0;
> + }
> + if (new_options & WDIOS_ENABLECARD) {
> + asr_enable();
> asr_toggle();
> - return 0;
> -
> - /*
> - * The hardware has a fixed timeout value, so no WDIOC_SETTIMEOUT
> - * and WDIOC_GETTIMEOUT always returns 256.
> - */
> - case WDIOC_GETTIMEOUT:
> - heartbeat = 256;
> - return put_user(heartbeat, p);
> -
> - case WDIOC_SETOPTIONS: {
> - int new_options, retval = -EINVAL;
> -
> - if (get_user(new_options, p))
> - return -EFAULT;
> -
> - if (new_options & WDIOS_DISABLECARD) {
> - asr_disable();
> - retval = 0;
> - }
> -
> - if (new_options & WDIOS_ENABLECARD) {
> - asr_enable();
> - asr_toggle();
> - retval = 0;
> - }
> -
> - return retval;
> + retval = 0;
> }
> + return retval;
> + }
> + default:
> + return -ENOTTY;
> }
> -
> - return -ENOTTY;
> }
>
> static int asr_open(struct inode *inode, struct file *file)
> {
> - if(test_and_set_bit(0, &asr_is_open))
> + if (test_and_set_bit(0, &asr_is_open))
> return -EBUSY;
>
> asr_toggle();
> @@ -314,7 +334,8 @@ static int asr_release(struct inode *inode, struct file *file)
> if (asr_expect_close == 42)
> asr_disable();
> else {
> - printk(KERN_CRIT PFX "unexpected close, not stopping watchdog!\n");
> + printk(KERN_CRIT PFX
> + "unexpected close, not stopping watchdog!\n");
> asr_toggle();
> }
> clear_bit(0, &asr_is_open);
> @@ -323,12 +344,12 @@ static int asr_release(struct inode *inode, struct file *file)
> }
>
> static const struct file_operations asr_fops = {
> - .owner = THIS_MODULE,
> - .llseek = no_llseek,
> - .write = asr_write,
> - .ioctl = asr_ioctl,
> - .open = asr_open,
> - .release = asr_release,
> + .owner = THIS_MODULE,
> + .llseek = no_llseek,
> + .write = asr_write,
> + .unlocked_ioctl = asr_ioctl,
> + .open = asr_open,
> + .release = asr_release,
> };
>
> static struct miscdevice asr_miscdev = {
> @@ -367,6 +388,8 @@ static int __init ibmasr_init(void)
> if (!asr_type)
> return -ENODEV;
>
> + spin_lock_init(&asr_lock);
> +
> rc = asr_get_base_address();
> if (rc)
> return rc;
> @@ -395,7 +418,9 @@ module_init(ibmasr_init);
> module_exit(ibmasr_exit);
>
> module_param(nowayout, int, 0);
> -MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
> +MODULE_PARM_DESC(nowayout,
> + "Watchdog cannot be stopped once started (default="
> + __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
>
> MODULE_DESCRIPTION("IBM Automatic Server Restart driver");
> MODULE_AUTHOR("Andrey Panin");
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>
--
Andrey Panin | Linux and UNIX system administrator
pazke@donpac.ru | PGP key: wwwkeys.pgp.net
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 189 bytes --]
^ permalink raw reply [flat|nested] 72+ messages in thread
* [PATCH 15/57] indydog: Clean up and tidy
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (13 preceding siblings ...)
2008-05-19 13:06 ` [PATCH 14/57] ibmasr: coding style, locking verify Alan Cox
@ 2008-05-19 13:06 ` Alan Cox
2008-05-19 13:06 ` [PATCH 16/57] iop: watchdog switch to unlocked_ioctl Alan Cox
` (42 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:06 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
Switch to unlocked_ioctl as well
---
drivers/watchdog/indydog.c | 114 ++++++++++++++++++++++++--------------------
1 files changed, 62 insertions(+), 52 deletions(-)
diff --git a/drivers/watchdog/indydog.c b/drivers/watchdog/indydog.c
index 788245b..0bffea3 100644
--- a/drivers/watchdog/indydog.c
+++ b/drivers/watchdog/indydog.c
@@ -1,7 +1,8 @@
/*
* IndyDog 0.3 A Hardware Watchdog Device for SGI IP22
*
- * (c) Copyright 2002 Guido Guenther <agx@sigxcpu.org>, All Rights Reserved.
+ * (c) Copyright 2002 Guido Guenther <agx@sigxcpu.org>,
+ * All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -22,32 +23,42 @@
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/init.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <asm/sgi/mc.h>
#define PFX "indydog: "
-static int indydog_alive;
+static unsigned long indydog_alive;
+static spinlock_t indydog_lock;
#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
static void indydog_start(void)
{
- u32 mc_ctrl0 = sgimc->cpuctrl0;
+ u32 mc_ctrl0;
+ spin_lock(&indydog_lock);
+ mc_ctrl0 = sgimc->cpuctrl0;
mc_ctrl0 = sgimc->cpuctrl0 | SGIMC_CCTRL0_WDOG;
sgimc->cpuctrl0 = mc_ctrl0;
+ spin_unlock(&indydog_lock);
}
static void indydog_stop(void)
{
- u32 mc_ctrl0 = sgimc->cpuctrl0;
+ u32 mc_ctrl0;
+ spin_lock(&indydog_lock);
+
+ mc_ctrl0 = sgimc->cpuctrl0;
mc_ctrl0 &= ~SGIMC_CCTRL0_WDOG;
sgimc->cpuctrl0 = mc_ctrl0;
+ spin_unlock(&indydog_lock);
printk(KERN_INFO PFX "Stopped watchdog timer.\n");
}
@@ -62,7 +73,7 @@ static void indydog_ping(void)
*/
static int indydog_open(struct inode *inode, struct file *file)
{
- if (indydog_alive)
+ if (test_and_set_bit(0, &indydog_alive))
return -EBUSY;
if (nowayout)
@@ -84,23 +95,21 @@ static int indydog_release(struct inode *inode, struct file *file)
* Lock it in if it's a module and we defined ...NOWAYOUT */
if (!nowayout)
indydog_stop(); /* Turn the WDT off */
-
- indydog_alive = 0;
-
+ clear_bit(0, &indydog_alive);
return 0;
}
-static ssize_t indydog_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+static ssize_t indydog_write(struct file *file, const char *data,
+ size_t len, loff_t *ppos)
{
/* Refresh the timer. */
- if (len) {
+ if (len)
indydog_ping();
- }
return len;
}
-static int indydog_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long indydog_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int options, retval = -EINVAL;
static struct watchdog_info ident = {
@@ -111,42 +120,40 @@ static int indydog_ioctl(struct inode *inode, struct file *file,
};
switch (cmd) {
- default:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- if (copy_to_user((struct watchdog_info *)arg,
- &ident, sizeof(ident)))
- return -EFAULT;
- return 0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0,(int *)arg);
- case WDIOC_KEEPALIVE:
- indydog_ping();
- return 0;
- case WDIOC_GETTIMEOUT:
- return put_user(WATCHDOG_TIMEOUT,(int *)arg);
- case WDIOC_SETOPTIONS:
- {
- if (get_user(options, (int *)arg))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- indydog_stop();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- indydog_start();
- retval = 0;
- }
-
- return retval;
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user((struct watchdog_info *)arg,
+ &ident, sizeof(ident)))
+ return -EFAULT;
+ return 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, (int *)arg);
+ case WDIOC_KEEPALIVE:
+ indydog_ping();
+ return 0;
+ case WDIOC_GETTIMEOUT:
+ return put_user(WATCHDOG_TIMEOUT, (int *)arg);
+ case WDIOC_SETOPTIONS:
+ {
+ if (get_user(options, (int *)arg))
+ return -EFAULT;
+ if (options & WDIOS_DISABLECARD) {
+ indydog_stop();
+ retval = 0;
+ }
+ if (options & WDIOS_ENABLECARD) {
+ indydog_start();
+ retval = 0;
}
+ return retval;
+ }
+ default:
+ return -ENOTTY;
}
}
-static int indydog_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
+static int indydog_notify_sys(struct notifier_block *this,
+ unsigned long code, void *unused)
{
if (code == SYS_DOWN || code == SYS_HALT)
indydog_stop(); /* Turn the WDT off */
@@ -158,7 +165,7 @@ static const struct file_operations indydog_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = indydog_write,
- .ioctl = indydog_ioctl,
+ .unlocked_ioctl = indydog_ioctl,
.open = indydog_open,
.release = indydog_release,
};
@@ -180,17 +187,20 @@ static int __init watchdog_init(void)
{
int ret;
+ spin_lock_init(&indydog_lock);
+
ret = register_reboot_notifier(&indydog_notifier);
if (ret) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", ret);
return ret;
}
ret = misc_register(&indydog_miscdev);
if (ret) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
unregister_reboot_notifier(&indydog_notifier);
return ret;
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 16/57] iop: watchdog switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (14 preceding siblings ...)
2008-05-19 13:06 ` [PATCH 15/57] indydog: Clean up and tidy Alan Cox
@ 2008-05-19 13:06 ` Alan Cox
2008-05-19 13:06 ` [PATCH 17/57] it8712f: unlocked_ioctl Alan Cox
` (41 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:06 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/iop_wdt.c | 46 +++++++++++++++++++++++---------------------
1 files changed, 24 insertions(+), 22 deletions(-)
diff --git a/drivers/watchdog/iop_wdt.c b/drivers/watchdog/iop_wdt.c
index bbbd91a..e54c888 100644
--- a/drivers/watchdog/iop_wdt.c
+++ b/drivers/watchdog/iop_wdt.c
@@ -37,6 +37,7 @@
static int nowayout = WATCHDOG_NOWAYOUT;
static unsigned long wdt_status;
static unsigned long boot_status;
+static spinlock_t wdt_lock;
#define WDT_IN_USE 0
#define WDT_OK_TO_CLOSE 1
@@ -68,8 +69,10 @@ static void wdt_enable(void)
/* Arm and enable the Timer to starting counting down from 0xFFFF.FFFF
* Takes approx. 10.7s to timeout
*/
+ spin_lock(&wdt_lock);
write_wdtcr(IOP_WDTCR_EN_ARM);
write_wdtcr(IOP_WDTCR_EN);
+ spin_unlock(&wdt_lock);
}
/* returns 0 if the timer was successfully disabled */
@@ -77,9 +80,11 @@ static int wdt_disable(void)
{
/* Stop Counting */
if (wdt_supports_disable()) {
+ spin_lock(&wdt_lock);
write_wdtcr(IOP_WDTCR_DIS_ARM);
write_wdtcr(IOP_WDTCR_DIS);
clear_bit(WDT_ENABLED, &wdt_status);
+ spin_unlock(&wdt_lock);
printk(KERN_INFO "WATCHDOG: Disabled\n");
return 0;
} else
@@ -92,16 +97,12 @@ static int iop_wdt_open(struct inode *inode, struct file *file)
return -EBUSY;
clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
wdt_enable();
-
set_bit(WDT_ENABLED, &wdt_status);
-
return nonseekable_open(inode, file);
}
-static ssize_t
-iop_wdt_write(struct file *file, const char *data, size_t len,
+static ssize_t iop_wdt_write(struct file *file, const char *data, size_t len,
loff_t *ppos)
{
if (len) {
@@ -121,41 +122,39 @@ iop_wdt_write(struct file *file, const char *data, size_t len,
}
wdt_enable();
}
-
return len;
}
-static struct watchdog_info ident = {
+static const struct watchdog_info ident = {
.options = WDIOF_CARDRESET | WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING,
.identity = "iop watchdog",
};
-static int
-iop_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long iop_wdt_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
{
int options;
int ret = -ENOTTY;
+ int __user *argp = (int __user *)arg;
switch (cmd) {
case WDIOC_GETSUPPORT:
- if (copy_to_user
- ((struct watchdog_info *)arg, &ident, sizeof ident))
+ if (copy_to_user(argp, &ident, sizeof ident))
ret = -EFAULT;
else
ret = 0;
break;
case WDIOC_GETSTATUS:
- ret = put_user(0, (int *)arg);
+ ret = put_user(0, argp);
break;
case WDIOC_GETBOOTSTATUS:
- ret = put_user(boot_status, (int *)arg);
+ ret = put_user(boot_status, argp);
break;
case WDIOC_GETTIMEOUT:
- ret = put_user(iop_watchdog_timeout(), (int *)arg);
+ ret = put_user(iop_watchdog_timeout(), argp);
break;
case WDIOC_KEEPALIVE:
@@ -177,14 +176,12 @@ iop_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
} else
ret = 0;
}
-
if (options & WDIOS_ENABLECARD) {
wdt_enable();
ret = 0;
}
break;
}
-
return ret;
}
@@ -214,7 +211,7 @@ static const struct file_operations iop_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = iop_wdt_write,
- .ioctl = iop_wdt_ioctl,
+ .unlocked_ioctl = iop_wdt_ioctl,
.open = iop_wdt_open,
.release = iop_wdt_release,
};
@@ -229,10 +226,8 @@ static int __init iop_wdt_init(void)
{
int ret;
- ret = misc_register(&iop_wdt_miscdev);
- if (ret == 0)
- printk("iop watchdog timer: timeout %lu sec\n",
- iop_watchdog_timeout());
+ spin_lock_init(&wdt_lock);
+
/* check if the reset was caused by the watchdog timer */
boot_status = (read_rcsr() & IOP_RCSR_WDT) ? WDIOF_CARDRESET : 0;
@@ -242,6 +237,13 @@ static int __init iop_wdt_init(void)
*/
write_wdtsr(IOP13XX_WDTCR_IB_RESET);
+ /* Register after we have the device set up so we cannot race
+ with an open */
+ ret = misc_register(&iop_wdt_miscdev);
+ if (ret == 0)
+ printk("iop watchdog timer: timeout %lu sec\n",
+ iop_watchdog_timeout());
+
return ret;
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 17/57] it8712f: unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (15 preceding siblings ...)
2008-05-19 13:06 ` [PATCH 16/57] iop: watchdog switch to unlocked_ioctl Alan Cox
@ 2008-05-19 13:06 ` Alan Cox
2008-05-19 13:06 ` [PATCH 18/57] iTCO: unlocked_ioctl, coding style and cleanup Alan Cox
` (40 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:06 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/it8712f_wdt.c | 77 ++++++++++++++--------------------------
1 files changed, 27 insertions(+), 50 deletions(-)
diff --git a/drivers/watchdog/it8712f_wdt.c b/drivers/watchdog/it8712f_wdt.c
index 445b7e8..51bfd57 100644
--- a/drivers/watchdog/it8712f_wdt.c
+++ b/drivers/watchdog/it8712f_wdt.c
@@ -30,9 +30,8 @@
#include <linux/fs.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
-
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
#define NAME "it8712f_wdt"
@@ -50,7 +49,7 @@ static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout, "Disable watchdog shutdown on close");
-static struct semaphore it8712f_wdt_sem;
+static unsigned long wdt_open;
static unsigned expect_close;
static spinlock_t io_lock;
static unsigned char revision;
@@ -86,22 +85,19 @@ static unsigned short address;
#define WDT_OUT_PWROK 0x10
#define WDT_OUT_KRST 0x40
-static int
-superio_inb(int reg)
+static int superio_inb(int reg)
{
outb(reg, REG);
return inb(VAL);
}
-static void
-superio_outb(int val, int reg)
+static void superio_outb(int val, int reg)
{
outb(reg, REG);
outb(val, VAL);
}
-static int
-superio_inw(int reg)
+static int superio_inw(int reg)
{
int val;
outb(reg++, REG);
@@ -111,15 +107,13 @@ superio_inw(int reg)
return val;
}
-static inline void
-superio_select(int ldn)
+static inline void superio_select(int ldn)
{
outb(LDN, REG);
outb(ldn, VAL);
}
-static inline void
-superio_enter(void)
+static inline void superio_enter(void)
{
spin_lock(&io_lock);
outb(0x87, REG);
@@ -128,22 +122,19 @@ superio_enter(void)
outb(0x55, REG);
}
-static inline void
-superio_exit(void)
+static inline void superio_exit(void)
{
outb(0x02, REG);
outb(0x02, VAL);
spin_unlock(&io_lock);
}
-static inline void
-it8712f_wdt_ping(void)
+static inline void it8712f_wdt_ping(void)
{
inb(address);
}
-static void
-it8712f_wdt_update_margin(void)
+static void it8712f_wdt_update_margin(void)
{
int config = WDT_OUT_KRST | WDT_OUT_PWROK;
int units = margin;
@@ -165,8 +156,7 @@ it8712f_wdt_update_margin(void)
superio_outb(units, WDT_TIMEOUT);
}
-static int
-it8712f_wdt_get_status(void)
+static int it8712f_wdt_get_status(void)
{
if (superio_inb(WDT_CONTROL) & 0x01)
return WDIOF_CARDRESET;
@@ -174,8 +164,7 @@ it8712f_wdt_get_status(void)
return 0;
}
-static void
-it8712f_wdt_enable(void)
+static void it8712f_wdt_enable(void)
{
printk(KERN_DEBUG NAME ": enabling watchdog timer\n");
superio_enter();
@@ -190,8 +179,7 @@ it8712f_wdt_enable(void)
it8712f_wdt_ping();
}
-static void
-it8712f_wdt_disable(void)
+static void it8712f_wdt_disable(void)
{
printk(KERN_DEBUG NAME ": disabling watchdog timer\n");
@@ -207,8 +195,7 @@ it8712f_wdt_disable(void)
superio_exit();
}
-static int
-it8712f_wdt_notify(struct notifier_block *this,
+static int it8712f_wdt_notify(struct notifier_block *this,
unsigned long code, void *unused)
{
if (code == SYS_HALT || code == SYS_POWER_OFF)
@@ -222,9 +209,8 @@ static struct notifier_block it8712f_wdt_notifier = {
.notifier_call = it8712f_wdt_notify,
};
-static ssize_t
-it8712f_wdt_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos)
+static ssize_t it8712f_wdt_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
{
/* check for a magic close character */
if (len) {
@@ -245,9 +231,8 @@ it8712f_wdt_write(struct file *file, const char __user *data,
return len;
}
-static int
-it8712f_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long it8712f_wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
@@ -302,19 +287,16 @@ it8712f_wdt_ioctl(struct inode *inode, struct file *file,
}
}
-static int
-it8712f_wdt_open(struct inode *inode, struct file *file)
+static int it8712f_wdt_open(struct inode *inode, struct file *file)
{
/* only allow one at a time */
- if (down_trylock(&it8712f_wdt_sem))
+ if (test_and_set_bit(0, &wdt_open))
return -EBUSY;
it8712f_wdt_enable();
-
return nonseekable_open(inode, file);
}
-static int
-it8712f_wdt_release(struct inode *inode, struct file *file)
+static int it8712f_wdt_release(struct inode *inode, struct file *file)
{
if (expect_close != 42) {
printk(KERN_WARNING NAME
@@ -324,7 +306,7 @@ it8712f_wdt_release(struct inode *inode, struct file *file)
it8712f_wdt_disable();
}
expect_close = 0;
- up(&it8712f_wdt_sem);
+ clear_bit(0, &wdt_open);
return 0;
}
@@ -333,7 +315,7 @@ static const struct file_operations it8712f_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = it8712f_wdt_write,
- .ioctl = it8712f_wdt_ioctl,
+ .unlocked_ioctl = it8712f_wdt_ioctl,
.open = it8712f_wdt_open,
.release = it8712f_wdt_release,
};
@@ -344,8 +326,7 @@ static struct miscdevice it8712f_wdt_miscdev = {
.fops = &it8712f_wdt_fops,
};
-static int __init
-it8712f_wdt_find(unsigned short *address)
+static int __init it8712f_wdt_find(unsigned short *address)
{
int err = -ENODEV;
int chip_type;
@@ -387,8 +368,7 @@ exit:
return err;
}
-static int __init
-it8712f_wdt_init(void)
+static int __init it8712f_wdt_init(void)
{
int err = 0;
@@ -404,8 +384,6 @@ it8712f_wdt_init(void)
it8712f_wdt_disable();
- sema_init(&it8712f_wdt_sem, 1);
-
err = register_reboot_notifier(&it8712f_wdt_notifier);
if (err) {
printk(KERN_ERR NAME ": unable to register reboot notifier\n");
@@ -430,8 +408,7 @@ out:
return err;
}
-static void __exit
-it8712f_wdt_exit(void)
+static void __exit it8712f_wdt_exit(void)
{
misc_deregister(&it8712f_wdt_miscdev);
unregister_reboot_notifier(&it8712f_wdt_notifier);
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 18/57] iTCO: unlocked_ioctl, coding style and cleanup
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (16 preceding siblings ...)
2008-05-19 13:06 ` [PATCH 17/57] it8712f: unlocked_ioctl Alan Cox
@ 2008-05-19 13:06 ` Alan Cox
2008-05-20 8:26 ` Andrew Morton
2008-05-19 13:06 ` [PATCH 19/57] bfin: watchdog cleanup and unlocked_ioctl Alan Cox
` (39 subsequent siblings)
57 siblings, 1 reply; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:06 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/iTCO_vendor.h | 15 ++
drivers/watchdog/iTCO_vendor_support.c | 53 +++---
drivers/watchdog/iTCO_wdt.c | 294 ++++++++++++++++----------------
3 files changed, 188 insertions(+), 174 deletions(-)
create mode 100644 drivers/watchdog/iTCO_vendor.h
diff --git a/drivers/watchdog/iTCO_vendor.h b/drivers/watchdog/iTCO_vendor.h
new file mode 100644
index 0000000..9e27e64
--- /dev/null
+++ b/drivers/watchdog/iTCO_vendor.h
@@ -0,0 +1,15 @@
+/* iTCO Vendor Specific Support hooks */
+#ifdef CONFIG_ITCO_VENDOR_SUPPORT
+extern void iTCO_vendor_pre_start(unsigned long, unsigned int);
+extern void iTCO_vendor_pre_stop(unsigned long);
+extern void iTCO_vendor_pre_keepalive(unsigned long, unsigned int);
+extern void iTCO_vendor_pre_set_heartbeat(unsigned int);
+extern int iTCO_vendor_check_noreboot_on(void);
+#else
+#define iTCO_vendor_pre_start(acpibase, heartbeat) {}
+#define iTCO_vendor_pre_stop(acpibase) {}
+#define iTCO_vendor_pre_keepalive(acpibase, heartbeat) {}
+#define iTCO_vendor_pre_set_heartbeat(heartbeat) {}
+#define iTCO_vendor_check_noreboot_on() 1
+ /* 1=check noreboot; 0=don't check */
+#endif
diff --git a/drivers/watchdog/iTCO_vendor_support.c b/drivers/watchdog/iTCO_vendor_support.c
index cafc465..09e9534 100644
--- a/drivers/watchdog/iTCO_vendor_support.c
+++ b/drivers/watchdog/iTCO_vendor_support.c
@@ -32,7 +32,9 @@
#include <linux/init.h> /* For __init/__exit/... */
#include <linux/ioport.h> /* For io-port access */
-#include <asm/io.h> /* For inb/outb/... */
+#include <linux/io.h> /* For inb/outb/... */
+
+#include "iTCO_vendor.h"
/* iTCO defines */
#define SMI_EN acpibase + 0x30 /* SMI Control and Enable Register */
@@ -40,10 +42,12 @@
#define TCO1_STS TCOBASE + 0x04 /* TCO1 Status Register */
/* List of vendor support modes */
-#define SUPERMICRO_OLD_BOARD 1 /* SuperMicro Pentium 3 Era 370SSE+-OEM1/P3TSSE */
-#define SUPERMICRO_NEW_BOARD 2 /* SuperMicro Pentium 4 / Xeon 4 / EMT64T Era Systems */
+/* SuperMicro Pentium 3 Era 370SSE+-OEM1/P3TSSE */
+#define SUPERMICRO_OLD_BOARD 1
+/* SuperMicro Pentium 4 / Xeon 4 / EMT64T Era Systems */
+#define SUPERMICRO_NEW_BOARD 2
-static int vendorsupport = 0;
+static int vendorsupport;
module_param(vendorsupport, int, 0);
MODULE_PARM_DESC(vendorsupport, "iTCO vendor specific support mode, default=0 (none), 1=SuperMicro Pent3, 2=SuperMicro Pent4+");
@@ -143,34 +147,35 @@ static void supermicro_old_pre_keepalive(unsigned long acpibase)
*/
/* I/O Port's */
-#define SM_REGINDEX 0x2e /* SuperMicro ICH4+ Register Index */
-#define SM_DATAIO 0x2f /* SuperMicro ICH4+ Register Data I/O */
+#define SM_REGINDEX 0x2e /* SuperMicro ICH4+ Register Index */
+#define SM_DATAIO 0x2f /* SuperMicro ICH4+ Register Data I/O */
/* Control Register's */
-#define SM_CTLPAGESW 0x07 /* SuperMicro ICH4+ Control Page Switch */
-#define SM_CTLPAGE 0x08 /* SuperMicro ICH4+ Control Page Num */
+#define SM_CTLPAGESW 0x07 /* SuperMicro ICH4+ Control Page Switch */
+#define SM_CTLPAGE 0x08 /* SuperMicro ICH4+ Control Page Num */
-#define SM_WATCHENABLE 0x30 /* Watchdog enable: Bit 0: 0=off, 1=on */
+#define SM_WATCHENABLE 0x30 /* Watchdog enable: Bit 0: 0=off, 1=on */
-#define SM_WATCHPAGE 0x87 /* Watchdog unlock control page */
+#define SM_WATCHPAGE 0x87 /* Watchdog unlock control page */
-#define SM_ENDWATCH 0xAA /* Watchdog lock control page */
+#define SM_ENDWATCH 0xAA /* Watchdog lock control page */
-#define SM_COUNTMODE 0xf5 /* Watchdog count mode select */
- /* (Bit 3: 0 = seconds, 1 = minutes */
+#define SM_COUNTMODE 0xf5 /* Watchdog count mode select */
+ /* (Bit 3: 0 = seconds, 1 = minutes */
-#define SM_WATCHTIMER 0xf6 /* 8-bits, Watchdog timer counter (RW) */
+#define SM_WATCHTIMER 0xf6 /* 8-bits, Watchdog timer counter (RW) */
-#define SM_RESETCONTROL 0xf7 /* Watchdog reset control */
- /* Bit 6: timer is reset by kbd interrupt */
- /* Bit 7: timer is reset by mouse interrupt */
+#define SM_RESETCONTROL 0xf7 /* Watchdog reset control */
+ /* Bit 6: timer is reset by kbd interrupt */
+ /* Bit 7: timer is reset by mouse interrupt */
static void supermicro_new_unlock_watchdog(void)
{
- outb(SM_WATCHPAGE, SM_REGINDEX); /* Write 0x87 to port 0x2e twice */
+ /* Write 0x87 to port 0x2e twice */
outb(SM_WATCHPAGE, SM_REGINDEX);
-
- outb(SM_CTLPAGESW, SM_REGINDEX); /* Switch to watchdog control page */
+ outb(SM_WATCHPAGE, SM_REGINDEX);
+ /* Switch to watchdog control page */
+ outb(SM_CTLPAGESW, SM_REGINDEX);
outb(SM_CTLPAGE, SM_DATAIO);
}
@@ -192,7 +197,7 @@ static void supermicro_new_pre_start(unsigned int heartbeat)
outb(val, SM_DATAIO);
/* Write heartbeat interval to WDOG */
- outb (SM_WATCHTIMER, SM_REGINDEX);
+ outb(SM_WATCHTIMER, SM_REGINDEX);
outb((heartbeat & 255), SM_DATAIO);
/* Make sure keyboard/mouse interrupts don't interfere */
@@ -277,7 +282,7 @@ EXPORT_SYMBOL(iTCO_vendor_pre_set_heartbeat);
int iTCO_vendor_check_noreboot_on(void)
{
- switch(vendorsupport) {
+ switch (vendorsupport) {
case SUPERMICRO_OLD_BOARD:
return 0;
default:
@@ -288,13 +293,13 @@ EXPORT_SYMBOL(iTCO_vendor_check_noreboot_on);
static int __init iTCO_vendor_init_module(void)
{
- printk (KERN_INFO PFX "vendor-support=%d\n", vendorsupport);
+ printk(KERN_INFO PFX "vendor-support=%d\n", vendorsupport);
return 0;
}
static void __exit iTCO_vendor_exit_module(void)
{
- printk (KERN_INFO PFX "Module Unloaded\n");
+ printk(KERN_INFO PFX "Module Unloaded\n");
}
module_init(iTCO_vendor_init_module);
diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c
index a0e6809..6bcfbea 100644
--- a/drivers/watchdog/iTCO_wdt.c
+++ b/drivers/watchdog/iTCO_wdt.c
@@ -65,7 +65,8 @@
#include <linux/types.h> /* For standard types (like size_t) */
#include <linux/errno.h> /* For the -ENODEV/... values */
#include <linux/kernel.h> /* For printk/panic/... */
-#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR) */
+#include <linux/miscdevice.h> /* For MODULE_ALIAS_MISCDEV
+ (WATCHDOG_MINOR) */
#include <linux/watchdog.h> /* For the watchdog specific items */
#include <linux/init.h> /* For __init/__exit/... */
#include <linux/fs.h> /* For file operations */
@@ -73,9 +74,10 @@
#include <linux/pci.h> /* For pci functions */
#include <linux/ioport.h> /* For io-port access */
#include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */
+#include <linux/uaccess.h> /* For copy_to_user/put_user/... */
+#include <linux/io.h> /* For inb/outb/... */
-#include <asm/uaccess.h> /* For copy_to_user/put_user/... */
-#include <asm/io.h> /* For inb/outb/... */
+#include "iTCO_vendor.h"
/* TCO related info */
enum iTCO_chipsets {
@@ -137,7 +139,7 @@ static struct {
{"ICH9R", 2},
{"ICH9DH", 2},
{"631xESB/632xESB", 2},
- {NULL,0}
+ {NULL, 0}
};
#define ITCO_PCI_DEVICE(dev, data) \
@@ -156,31 +158,31 @@ static struct {
* functions that probably will be registered by other drivers.
*/
static struct pci_device_id iTCO_wdt_pci_tbl[] = {
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801AA_0, TCO_ICH )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801AB_0, TCO_ICH0 )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801BA_0, TCO_ICH2 )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801BA_10, TCO_ICH2M )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801CA_0, TCO_ICH3 )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801CA_12, TCO_ICH3M )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801DB_0, TCO_ICH4 )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801DB_12, TCO_ICH4M )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801E_0, TCO_CICH )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801EB_0, TCO_ICH5 )},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801AA_0, TCO_ICH)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801AB_0, TCO_ICH0)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801BA_0, TCO_ICH2)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801BA_10, TCO_ICH2M)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801CA_0, TCO_ICH3)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801CA_12, TCO_ICH3M)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801DB_0, TCO_ICH4)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801DB_12, TCO_ICH4M)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801E_0, TCO_CICH)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801EB_0, TCO_ICH5)},
{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ESB_1, TCO_6300ESB)},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH6_0, TCO_ICH6 )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH6_1, TCO_ICH6M )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH6_2, TCO_ICH6W )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_0, TCO_ICH7 )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_1, TCO_ICH7M )},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH6_0, TCO_ICH6)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH6_1, TCO_ICH6M)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH6_2, TCO_ICH6W)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_0, TCO_ICH7)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_1, TCO_ICH7M)},
{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_31, TCO_ICH7MDH)},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_0, TCO_ICH8 )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_1, TCO_ICH8ME )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_2, TCO_ICH8DH )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_3, TCO_ICH8DO )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_4, TCO_ICH8M )},
- { ITCO_PCI_DEVICE(0x2918, TCO_ICH9 )},
- { ITCO_PCI_DEVICE(0x2916, TCO_ICH9R )},
- { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH9_2, TCO_ICH9DH )},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_0, TCO_ICH8)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_1, TCO_ICH8ME)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_2, TCO_ICH8DH)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_3, TCO_ICH8DO)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_4, TCO_ICH8M)},
+ { ITCO_PCI_DEVICE(0x2918, TCO_ICH9)},
+ { ITCO_PCI_DEVICE(0x2916, TCO_ICH9R)},
+ { ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH9_2, TCO_ICH9DH)},
{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ESB2_0, TCO_631XESB)},
{ ITCO_PCI_DEVICE(0x2671, TCO_631XESB)},
{ ITCO_PCI_DEVICE(0x2672, TCO_631XESB)},
@@ -199,13 +201,15 @@ static struct pci_device_id iTCO_wdt_pci_tbl[] = {
{ ITCO_PCI_DEVICE(0x267f, TCO_631XESB)},
{ 0, }, /* End of list */
};
-MODULE_DEVICE_TABLE (pci, iTCO_wdt_pci_tbl);
+MODULE_DEVICE_TABLE(pci, iTCO_wdt_pci_tbl);
/* Address definitions for the TCO */
-#define TCOBASE iTCO_wdt_private.ACPIBASE + 0x60 /* TCO base address */
-#define SMI_EN iTCO_wdt_private.ACPIBASE + 0x30 /* SMI Control and Enable Register */
+/* TCO base address */
+#define TCOBASE iTCO_wdt_private.ACPIBASE + 0x60
+/* SMI Control and Enable Register */
+#define SMI_EN iTCO_wdt_private.ACPIBASE + 0x30
-#define TCO_RLD TCOBASE + 0x00 /* TCO Timer Reload and Current Value */
+#define TCO_RLD TCOBASE + 0x00 /* TCO Timer Reload and Curr. Value */
#define TCOv1_TMR TCOBASE + 0x01 /* TCOv1 Timer Initial Value */
#define TCO_DAT_IN TCOBASE + 0x02 /* TCO Data In Register */
#define TCO_DAT_OUT TCOBASE + 0x03 /* TCO Data Out Register */
@@ -218,15 +222,21 @@ MODULE_DEVICE_TABLE (pci, iTCO_wdt_pci_tbl);
/* internal variables */
static unsigned long is_active;
static char expect_release;
-static struct { /* this is private data for the iTCO_wdt device */
- unsigned int iTCO_version; /* TCO version/generation */
- unsigned long ACPIBASE; /* The cards ACPIBASE address (TCOBASE = ACPIBASE+0x60) */
- unsigned long __iomem *gcs; /* NO_REBOOT flag is Memory-Mapped GCS register bit 5 (TCO version 2) */
- spinlock_t io_lock; /* the lock for io operations */
- struct pci_dev *pdev; /* the PCI-device */
+static struct { /* this is private data for the iTCO_wdt device */
+ /* TCO version/generation */
+ unsigned int iTCO_version;
+ /* The cards ACPIBASE address (TCOBASE = ACPIBASE+0x60) */
+ unsigned long ACPIBASE;
+ /* NO_REBOOT flag is Memory-Mapped GCS register bit 5 (TCO version 2)*/
+ unsigned long __iomem *gcs;
+ /* the lock for io operations */
+ spinlock_t io_lock;
+ /* the PCI-device */
+ struct pci_dev *pdev;
} iTCO_wdt_private;
-static struct platform_device *iTCO_wdt_platform_device; /* the watchdog platform device */
+/* the watchdog platform device */
+static struct platform_device *iTCO_wdt_platform_device;
/* module parameters */
#define WATCHDOG_HEARTBEAT 30 /* 30 sec default heartbeat */
@@ -236,22 +246,9 @@ MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (2<heartbeat<39 (TCO
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
-/* iTCO Vendor Specific Support hooks */
-#ifdef CONFIG_ITCO_VENDOR_SUPPORT
-extern void iTCO_vendor_pre_start(unsigned long, unsigned int);
-extern void iTCO_vendor_pre_stop(unsigned long);
-extern void iTCO_vendor_pre_keepalive(unsigned long, unsigned int);
-extern void iTCO_vendor_pre_set_heartbeat(unsigned int);
-extern int iTCO_vendor_check_noreboot_on(void);
-#else
-#define iTCO_vendor_pre_start(acpibase, heartbeat) {}
-#define iTCO_vendor_pre_stop(acpibase) {}
-#define iTCO_vendor_pre_keepalive(acpibase,heartbeat) {}
-#define iTCO_vendor_pre_set_heartbeat(heartbeat) {}
-#define iTCO_vendor_check_noreboot_on() 1 /* 1=check noreboot; 0=don't check */
-#endif
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* Some TCO specific functions
@@ -365,11 +362,10 @@ static int iTCO_wdt_keepalive(void)
iTCO_vendor_pre_keepalive(iTCO_wdt_private.ACPIBASE, heartbeat);
/* Reload the timer by writing to the TCO Timer Counter register */
- if (iTCO_wdt_private.iTCO_version == 2) {
+ if (iTCO_wdt_private.iTCO_version == 2)
outw(0x01, TCO_RLD);
- } else if (iTCO_wdt_private.iTCO_version == 1) {
+ else if (iTCO_wdt_private.iTCO_version == 1)
outb(0x01, TCO_RLD);
- }
spin_unlock(&iTCO_wdt_private.io_lock);
return 0;
@@ -421,7 +417,7 @@ static int iTCO_wdt_set_heartbeat(int t)
return 0;
}
-static int iTCO_wdt_get_timeleft (int *time_left)
+static int iTCO_wdt_get_timeleft(int *time_left)
{
unsigned int val16;
unsigned char val8;
@@ -450,7 +446,7 @@ static int iTCO_wdt_get_timeleft (int *time_left)
* /dev/watchdog handling
*/
-static int iTCO_wdt_open (struct inode *inode, struct file *file)
+static int iTCO_wdt_open(struct inode *inode, struct file *file)
{
/* /dev/watchdog can only be opened once */
if (test_and_set_bit(0, &is_active))
@@ -464,7 +460,7 @@ static int iTCO_wdt_open (struct inode *inode, struct file *file)
return nonseekable_open(inode, file);
}
-static int iTCO_wdt_release (struct inode *inode, struct file *file)
+static int iTCO_wdt_release(struct inode *inode, struct file *file)
{
/*
* Shut off the timer.
@@ -472,7 +468,8 @@ static int iTCO_wdt_release (struct inode *inode, struct file *file)
if (expect_release == 42) {
iTCO_wdt_stop();
} else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ printk(KERN_CRIT PFX
+ "Unexpected close, not stopping watchdog!\n");
iTCO_wdt_keepalive();
}
clear_bit(0, &is_active);
@@ -480,19 +477,20 @@ static int iTCO_wdt_release (struct inode *inode, struct file *file)
return 0;
}
-static ssize_t iTCO_wdt_write (struct file *file, const char __user *data,
- size_t len, loff_t * ppos)
+static ssize_t iTCO_wdt_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
{
/* See if we got the magic character 'V' and reload the timer */
if (len) {
if (!nowayout) {
size_t i;
- /* note: just in case someone wrote the magic character
- * five months ago... */
+ /* note: just in case someone wrote the magic
+ character five months ago... */
expect_release = 0;
- /* scan to see whether or not we got the magic character */
+ /* scan to see whether or not we got the
+ magic character */
for (i = 0; i != len; i++) {
char c;
if (get_user(c, data+i))
@@ -508,8 +506,8 @@ static ssize_t iTCO_wdt_write (struct file *file, const char __user *data,
return len;
}
-static int iTCO_wdt_ioctl (struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long iTCO_wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int new_options, retval = -EINVAL;
int new_heartbeat;
@@ -524,64 +522,52 @@ static int iTCO_wdt_ioctl (struct inode *inode, struct file *file,
};
switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident,
- sizeof (ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- iTCO_wdt_keepalive();
- return 0;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
- case WDIOC_SETOPTIONS:
- {
- if (get_user(new_options, p))
- return -EFAULT;
-
- if (new_options & WDIOS_DISABLECARD) {
- iTCO_wdt_stop();
- retval = 0;
- }
+ case WDIOC_KEEPALIVE:
+ iTCO_wdt_keepalive();
+ return 0;
- if (new_options & WDIOS_ENABLECARD) {
- iTCO_wdt_keepalive();
- iTCO_wdt_start();
- retval = 0;
- }
+ case WDIOC_SETOPTIONS:
+ {
+ if (get_user(new_options, p))
+ return -EFAULT;
- return retval;
+ if (new_options & WDIOS_DISABLECARD) {
+ iTCO_wdt_stop();
+ retval = 0;
}
-
- case WDIOC_SETTIMEOUT:
- {
- if (get_user(new_heartbeat, p))
- return -EFAULT;
-
- if (iTCO_wdt_set_heartbeat(new_heartbeat))
- return -EINVAL;
-
+ if (new_options & WDIOS_ENABLECARD) {
iTCO_wdt_keepalive();
- /* Fall */
+ iTCO_wdt_start();
+ retval = 0;
}
-
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, p);
-
- case WDIOC_GETTIMELEFT:
- {
- int time_left;
-
- if (iTCO_wdt_get_timeleft(&time_left))
- return -EINVAL;
-
- return put_user(time_left, p);
- }
-
- default:
- return -ENOTTY;
+ return retval;
+ }
+ case WDIOC_SETTIMEOUT:
+ {
+ if (get_user(new_heartbeat, p))
+ return -EFAULT;
+ if (iTCO_wdt_set_heartbeat(new_heartbeat))
+ return -EINVAL;
+ iTCO_wdt_keepalive();
+ /* Fall */
+ }
+ case WDIOC_GETTIMEOUT:
+ return put_user(heartbeat, p);
+ case WDIOC_GETTIMELEFT:
+ {
+ int time_left;
+ if (iTCO_wdt_get_timeleft(&time_left))
+ return -EINVAL;
+ return put_user(time_left, p);
+ }
+ default:
+ return -ENOTTY;
}
}
@@ -590,12 +576,12 @@ static int iTCO_wdt_ioctl (struct inode *inode, struct file *file,
*/
static const struct file_operations iTCO_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = iTCO_wdt_write,
- .ioctl = iTCO_wdt_ioctl,
- .open = iTCO_wdt_open,
- .release = iTCO_wdt_release,
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = iTCO_wdt_write,
+ .unlocked_ioctl = iTCO_wdt_ioctl,
+ .open = iTCO_wdt_open,
+ .release = iTCO_wdt_release,
};
static struct miscdevice iTCO_wdt_miscdev = {
@@ -608,7 +594,8 @@ static struct miscdevice iTCO_wdt_miscdev = {
* Init & exit routines
*/
-static int __devinit iTCO_wdt_init(struct pci_dev *pdev, const struct pci_device_id *ent, struct platform_device *dev)
+static int __devinit iTCO_wdt_init(struct pci_dev *pdev,
+ const struct pci_device_id *ent, struct platform_device *dev)
{
int ret;
u32 base_address;
@@ -628,17 +615,19 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev, const struct pci_device
pci_dev_put(pdev);
return -ENODEV;
}
- iTCO_wdt_private.iTCO_version = iTCO_chipset_info[ent->driver_data].iTCO_version;
+ iTCO_wdt_private.iTCO_version =
+ iTCO_chipset_info[ent->driver_data].iTCO_version;
iTCO_wdt_private.ACPIBASE = base_address;
iTCO_wdt_private.pdev = pdev;
- /* Get the Memory-Mapped GCS register, we need it for the NO_REBOOT flag (TCO v2) */
- /* To get access to it you have to read RCBA from PCI Config space 0xf0
- and use it as base. GCS = RCBA + ICH6_GCS(0x3410). */
+ /* Get the Memory-Mapped GCS register, we need it for the
+ NO_REBOOT flag (TCO v2). To get access to it you have to
+ read RCBA from PCI Config space 0xf0 and use it as base.
+ GCS = RCBA + ICH6_GCS(0x3410). */
if (iTCO_wdt_private.iTCO_version == 2) {
pci_read_config_dword(pdev, 0xf0, &base_address);
RCBA = base_address & 0xffffc000;
- iTCO_wdt_private.gcs = ioremap((RCBA + 0x3410),4);
+ iTCO_wdt_private.gcs = ioremap((RCBA + 0x3410), 4);
}
/* Check chipset's NO_REBOOT bit */
@@ -653,8 +642,8 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev, const struct pci_device
/* Set the TCO_EN bit in SMI_EN register */
if (!request_region(SMI_EN, 4, "iTCO_wdt")) {
- printk(KERN_ERR PFX "I/O address 0x%04lx already in use\n",
- SMI_EN );
+ printk(KERN_ERR PFX
+ "I/O address 0x%04lx already in use\n", SMI_EN);
ret = -EIO;
goto out;
}
@@ -663,18 +652,20 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev, const struct pci_device
outl(val32, SMI_EN);
release_region(SMI_EN, 4);
- /* The TCO I/O registers reside in a 32-byte range pointed to by the TCOBASE value */
- if (!request_region (TCOBASE, 0x20, "iTCO_wdt")) {
- printk (KERN_ERR PFX "I/O address 0x%04lx already in use\n",
+ /* The TCO I/O registers reside in a 32-byte range pointed to
+ by the TCOBASE value */
+ if (!request_region(TCOBASE, 0x20, "iTCO_wdt")) {
+ printk(KERN_ERR PFX "I/O address 0x%04lx already in use\n",
TCOBASE);
ret = -EIO;
goto out;
}
- printk(KERN_INFO PFX "Found a %s TCO device (Version=%d, TCOBASE=0x%04lx)\n",
- iTCO_chipset_info[ent->driver_data].name,
- iTCO_chipset_info[ent->driver_data].iTCO_version,
- TCOBASE);
+ printk(KERN_INFO PFX
+ "Found a %s TCO device (Version=%d, TCOBASE=0x%04lx)\n",
+ iTCO_chipset_info[ent->driver_data].name,
+ iTCO_chipset_info[ent->driver_data].iTCO_version,
+ TCOBASE);
/* Clear out the (probably old) status */
outb(0, TCO1_STS);
@@ -683,27 +674,29 @@ static int __devinit iTCO_wdt_init(struct pci_dev *pdev, const struct pci_device
/* Make sure the watchdog is not running */
iTCO_wdt_stop();
- /* Check that the heartbeat value is within it's range ; if not reset to the default */
+ /* Check that the heartbeat value is within it's range;
+ if not reset to the default */
if (iTCO_wdt_set_heartbeat(heartbeat)) {
iTCO_wdt_set_heartbeat(WATCHDOG_HEARTBEAT);
- printk(KERN_INFO PFX "heartbeat value must be 2<heartbeat<39 (TCO v1) or 613 (TCO v2), using %d\n",
- heartbeat);
+ printk(KERN_INFO PFX "heartbeat value must be 2 < heartbeat < 39 (TCO v1) or 613 (TCO v2), using %d\n",
+ heartbeat);
}
ret = misc_register(&iTCO_wdt_miscdev);
if (ret != 0) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
goto unreg_region;
}
- printk (KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
- heartbeat, nowayout);
+ printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
+ heartbeat, nowayout);
return 0;
unreg_region:
- release_region (TCOBASE, 0x20);
+ release_region(TCOBASE, 0x20);
out:
if (iTCO_wdt_private.iTCO_version == 2)
iounmap(iTCO_wdt_private.gcs);
@@ -792,7 +785,8 @@ static int __init iTCO_wdt_init_module(void)
if (err)
return err;
- iTCO_wdt_platform_device = platform_device_register_simple(DRV_NAME, -1, NULL, 0);
+ iTCO_wdt_platform_device = platform_device_register_simple(DRV_NAME,
+ -1, NULL, 0);
if (IS_ERR(iTCO_wdt_platform_device)) {
err = PTR_ERR(iTCO_wdt_platform_device);
goto unreg_platform_driver;
^ permalink raw reply related [flat|nested] 72+ messages in thread* Re: [PATCH 18/57] iTCO: unlocked_ioctl, coding style and cleanup
2008-05-19 13:06 ` [PATCH 18/57] iTCO: unlocked_ioctl, coding style and cleanup Alan Cox
@ 2008-05-20 8:26 ` Andrew Morton
2008-05-21 4:26 ` Rusty Russell
0 siblings, 1 reply; 72+ messages in thread
From: Andrew Morton @ 2008-05-20 8:26 UTC (permalink / raw)
To: Alan Cox; +Cc: linux-kernel, wim, Rusty Russell
On Mon, 19 May 2008 14:06:25 +0100 Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> drivers/watchdog/iTCO_vendor.h | 15 ++
> drivers/watchdog/iTCO_vendor_support.c | 53 +++---
> drivers/watchdog/iTCO_wdt.c | 294 ++++++++++++++++----------------
This runs afoul of git-watchdog and/or itco_wdt-ich9do-support.patch
Hunk #1 succeeded at 66 (offset 1 line).
Hunk #3 FAILED at 139.
Hunk #4 FAILED at 158.
Hunk #5 FAILED at 201.
Hunk #6 FAILED at 222.
Hunk #7 FAILED at 246.
Hunk #8 succeeded at 374 (offset 12 lines).
Hunk #9 FAILED at 429.
Hunk #10 FAILED at 458.
Hunk #11 FAILED at 472.
Hunk #12 FAILED at 480.
Hunk #13 FAILED at 489.
Hunk #14 FAILED at 518.
Hunk #15 FAILED at 534.
Hunk #16 FAILED at 588.
Hunk #17 succeeded at 454 (offset -140 lines).
Hunk #18 FAILED at 475.
Hunk #19 succeeded at 669 (offset 27 lines).
Hunk #20 succeeded at 512 (offset -140 lines).
Hunk #21 FAILED at 534.
Hunk #22 succeeded at 814 (offset 29 lines).
15 out of 22 hunks FAILED -- saving rejects to file drivers/watchdog/iTCO_wdt.c.rej
so I ducked this one.
booke-watchdog-clean-up-and-unlocked_ioctl gets 8-out-of-ten against
watchdog-fix-booke_wdtc-on-mpc85xx-smp-system.patch so I ducked that one too.
w83697hf_wdt-cleanup-coding-style-and-switch-to-unlocked_ioctl gets
4-of-17 against git-watchdog - also ducked.
The rest applied, although about half of them needed fixes because
Rusty has been running around fiddling with other peoples stuff
renaming down_trylock to down_nowait all over the tree.
This means that the watchdog patches now have a Rusty dependency so I
NEED TO KNOW if those patches aren't for 2.6.27 or if they get nacked
or something.
It also means that the patches which I queued cannot go into Wim's tree
as-is. If Wim queues the originals then it means that Stephen and/or
myself get to fix all the rejects again, and there'll be a
decent-sized smashup during the merge window. There are lessons
here...
And if Wim decides to merge these patches prior to merging
itco_wdt-ich9do-support.patch
watchdog-fix-booke_wdtc-on-mpc85xx-smp-system.patch
then those two patches will get wrecked.
^ permalink raw reply [flat|nested] 72+ messages in thread
* Re: [PATCH 18/57] iTCO: unlocked_ioctl, coding style and cleanup
2008-05-20 8:26 ` Andrew Morton
@ 2008-05-21 4:26 ` Rusty Russell
2008-05-21 4:36 ` Andrew Morton
2008-05-21 9:29 ` Alan Cox
0 siblings, 2 replies; 72+ messages in thread
From: Rusty Russell @ 2008-05-21 4:26 UTC (permalink / raw)
To: Andrew Morton; +Cc: Alan Cox, linux-kernel, wim, Stephen Rothwell
On Tuesday 20 May 2008 18:26:58 Andrew Morton wrote:
> On Mon, 19 May 2008 14:06:25 +0100 Alan Cox <alan@lxorguk.ukuu.org.uk>
wrote:
> > drivers/watchdog/iTCO_vendor.h | 15 ++
> > drivers/watchdog/iTCO_vendor_support.c | 53 +++---
> > drivers/watchdog/iTCO_wdt.c | 294
> > ++++++++++++++++----------------
>
> This runs afoul of git-watchdog and/or itco_wdt-ich9do-support.patch
>
> Hunk #1 succeeded at 66 (offset 1 line).
> Hunk #3 FAILED at 139.
> Hunk #4 FAILED at 158.
> Hunk #5 FAILED at 201.
> Hunk #6 FAILED at 222.
> Hunk #7 FAILED at 246.
> Hunk #8 succeeded at 374 (offset 12 lines).
> Hunk #9 FAILED at 429.
> Hunk #10 FAILED at 458.
> Hunk #11 FAILED at 472.
> Hunk #12 FAILED at 480.
> Hunk #13 FAILED at 489.
> Hunk #14 FAILED at 518.
> Hunk #15 FAILED at 534.
> Hunk #16 FAILED at 588.
> Hunk #17 succeeded at 454 (offset -140 lines).
> Hunk #18 FAILED at 475.
> Hunk #19 succeeded at 669 (offset 27 lines).
> Hunk #20 succeeded at 512 (offset -140 lines).
> Hunk #21 FAILED at 534.
> Hunk #22 succeeded at 814 (offset 29 lines).
> 15 out of 22 hunks FAILED -- saving rejects to file
> drivers/watchdog/iTCO_wdt.c.rej
>
> so I ducked this one.
>
> booke-watchdog-clean-up-and-unlocked_ioctl gets 8-out-of-ten against
> watchdog-fix-booke_wdtc-on-mpc85xx-smp-system.patch so I ducked that one
> too.
>
> w83697hf_wdt-cleanup-coding-style-and-switch-to-unlocked_ioctl gets
> 4-of-17 against git-watchdog - also ducked.
>
>
> The rest applied, although about half of them needed fixes because
> Rusty has been running around fiddling with other peoples stuff
> renaming down_trylock to down_nowait all over the tree.
>
> This means that the watchdog patches now have a Rusty dependency so I
> NEED TO KNOW if those patches aren't for 2.6.27 or if they get nacked
> or something.
>
> It also means that the patches which I queued cannot go into Wim's tree
> as-is. If Wim queues the originals then it means that Stephen and/or
> myself get to fix all the rejects again, and there'll be a
> decent-sized smashup during the merge window. There are lessons
> here...
I've been pulling out s/down_trylock/down_nowait/ patches which effect others'
changes. Those patches get moved to the end of my queue, and I'll revisit
them before an actual merge with Linus.
As down_trylock still works (but marked deprecated) with my patches, they're
fine to drop. Just tell me which ones...
Hope that helps,
Rusty.
^ permalink raw reply [flat|nested] 72+ messages in thread
* Re: [PATCH 18/57] iTCO: unlocked_ioctl, coding style and cleanup
2008-05-21 4:26 ` Rusty Russell
@ 2008-05-21 4:36 ` Andrew Morton
2008-05-21 4:58 ` Rusty Russell
2008-05-21 9:29 ` Alan Cox
1 sibling, 1 reply; 72+ messages in thread
From: Andrew Morton @ 2008-05-21 4:36 UTC (permalink / raw)
To: Rusty Russell; +Cc: Alan Cox, linux-kernel, wim, Stephen Rothwell
On Wed, 21 May 2008 14:26:15 +1000 Rusty Russell <rusty@rustcorp.com.au> wrote:
> > decent-sized smashup during the merge window. There are lessons
> > here...
>
> I've been pulling out s/down_trylock/down_nowait/ patches which effect others'
> changes. Those patches get moved to the end of my queue, and I'll revisit
> them before an actual merge with Linus.
>
> As down_trylock still works (but marked deprecated) with my patches, they're
> fine to drop. Just tell me which ones...
Well, a simple patch which does
/*
* comment goes here
*/
static inline int __must_check down_nowait(struct semaphore *sem)
{
return !down_trylock(sem);
}
and which does not deprecate down_trylock() could go into mainline
right now, (assuming that the overall concept doesn't get shot down in
review - did it get reviewed?)
Then you can start trickling stuff out to people straight away.
^ permalink raw reply [flat|nested] 72+ messages in thread* Re: [PATCH 18/57] iTCO: unlocked_ioctl, coding style and cleanup
2008-05-21 4:36 ` Andrew Morton
@ 2008-05-21 4:58 ` Rusty Russell
0 siblings, 0 replies; 72+ messages in thread
From: Rusty Russell @ 2008-05-21 4:58 UTC (permalink / raw)
To: Andrew Morton; +Cc: Alan Cox, linux-kernel, wim, Stephen Rothwell
On Wednesday 21 May 2008 14:36:54 Andrew Morton wrote:
> On Wed, 21 May 2008 14:26:15 +1000 Rusty Russell <rusty@rustcorp.com.au>
wrote:
> > > decent-sized smashup during the merge window. There are lessons
> > > here...
> >
> > I've been pulling out s/down_trylock/down_nowait/ patches which effect
> > others' changes. Those patches get moved to the end of my queue, and
> > I'll revisit them before an actual merge with Linus.
> >
> > As down_trylock still works (but marked deprecated) with my patches,
> > they're fine to drop. Just tell me which ones...
>
> Well, a simple patch which does
>
> /*
> * comment goes here
> */
> static inline int __must_check down_nowait(struct semaphore *sem)
> {
> return !down_trylock(sem);
> }
>
> and which does not deprecate down_trylock() could go into mainline
> right now
Sure, in this case it's probably worth it.
> , (assuming that the overall concept doesn't get shot down in
> review - did it get reviewed?)
Well, it got some commentry on lkml, mainly from Christoph H. He was the one
who came up with "down_nowait" vs the original "down_try".
> Then you can start trickling stuff out to people straight away.
OK, I'll send a patch now.
Thanks,
Rusty.
^ permalink raw reply [flat|nested] 72+ messages in thread
* Re: [PATCH 18/57] iTCO: unlocked_ioctl, coding style and cleanup
2008-05-21 4:26 ` Rusty Russell
2008-05-21 4:36 ` Andrew Morton
@ 2008-05-21 9:29 ` Alan Cox
2008-05-22 5:56 ` Rusty Russell
1 sibling, 1 reply; 72+ messages in thread
From: Alan Cox @ 2008-05-21 9:29 UTC (permalink / raw)
To: Rusty Russell; +Cc: Andrew Morton, linux-kernel, wim, Stephen Rothwell
> I've been pulling out s/down_trylock/down_nowait/ patches which effect others'
> changes. Those patches get moved to the end of my queue, and I'll revisit
> them before an actual merge with Linus.
The watchdog drivers all got the semaphores removed in the patch set I
did so you can dump that bit.
>
^ permalink raw reply [flat|nested] 72+ messages in thread
* Re: [PATCH 18/57] iTCO: unlocked_ioctl, coding style and cleanup
2008-05-21 9:29 ` Alan Cox
@ 2008-05-22 5:56 ` Rusty Russell
2008-05-22 6:15 ` Andrew Morton
0 siblings, 1 reply; 72+ messages in thread
From: Rusty Russell @ 2008-05-22 5:56 UTC (permalink / raw)
To: Alan Cox; +Cc: Andrew Morton, linux-kernel, wim, Stephen Rothwell
On Wednesday 21 May 2008 19:29:22 Alan Cox wrote:
> > I've been pulling out s/down_trylock/down_nowait/ patches which effect
> > others' changes. Those patches get moved to the end of my queue, and
> > I'll revisit them before an actual merge with Linus.
>
> The watchdog drivers all got the semaphores removed in the patch set I
> did so you can dump that bit.
Done, thanks. Are you in linux-next yet? Stephen is pretty good at telling
me about this kind of stuff...
Thanks,
Rusty.
^ permalink raw reply [flat|nested] 72+ messages in thread
* Re: [PATCH 18/57] iTCO: unlocked_ioctl, coding style and cleanup
2008-05-22 5:56 ` Rusty Russell
@ 2008-05-22 6:15 ` Andrew Morton
0 siblings, 0 replies; 72+ messages in thread
From: Andrew Morton @ 2008-05-22 6:15 UTC (permalink / raw)
To: Rusty Russell; +Cc: Alan Cox, linux-kernel, wim, Stephen Rothwell
On Thu, 22 May 2008 15:56:26 +1000 Rusty Russell <rusty@rustcorp.com.au> wrote:
> On Wednesday 21 May 2008 19:29:22 Alan Cox wrote:
> > > I've been pulling out s/down_trylock/down_nowait/ patches which effect
> > > others' changes. Those patches get moved to the end of my queue, and
> > > I'll revisit them before an actual merge with Linus.
> >
> > The watchdog drivers all got the semaphores removed in the patch set I
> > did so you can dump that bit.
>
> Done, thanks. Are you in linux-next yet? Stephen is pretty good at telling
> me about this kind of stuff...
Nope. I haven't worked out how to get -mm into linux-next yet. (Well,
I have, but I haven't worked out how to do it while getting Stephen to
do all the work ;)) Soon....
The route for these patches is via Wim - merge these into git-watchdog,
feed git-watchdog fed into linux-next. Please.
^ permalink raw reply [flat|nested] 72+ messages in thread
* [PATCH 19/57] bfin: watchdog cleanup and unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (17 preceding siblings ...)
2008-05-19 13:06 ` [PATCH 18/57] iTCO: unlocked_ioctl, coding style and cleanup Alan Cox
@ 2008-05-19 13:06 ` Alan Cox
2008-05-19 13:06 ` [PATCH 20/57] booke watchdog: clean up " Alan Cox
` (38 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:06 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
Scan, tidy and check for unlocked_ioctl
---
drivers/watchdog/bfin_wdt.c | 147 +++++++++++++++++++++----------------------
1 files changed, 71 insertions(+), 76 deletions(-)
diff --git a/drivers/watchdog/bfin_wdt.c b/drivers/watchdog/bfin_wdt.c
index 1237113..cd34652 100644
--- a/drivers/watchdog/bfin_wdt.c
+++ b/drivers/watchdog/bfin_wdt.c
@@ -25,7 +25,7 @@
#include <linux/init.h>
#include <linux/interrupt.h>
#include <asm/blackfin.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#define stamp(fmt, args...) pr_debug("%s:%i: " fmt "\n", __func__, __LINE__, ## args)
#define stampit() stamp("here i am")
@@ -147,7 +147,8 @@ static int bfin_wdt_set_timeout(unsigned long t)
int run = bfin_wdt_running();
bfin_wdt_stop();
bfin_write_WDOG_CNT(cnt);
- if (run) bfin_wdt_start();
+ if (run)
+ bfin_wdt_start();
}
spin_unlock_irqrestore(&bfin_wdt_spinlock, flags);
@@ -190,16 +191,15 @@ static int bfin_wdt_release(struct inode *inode, struct file *file)
{
stampit();
- if (expect_close == 42) {
+ if (expect_close == 42)
bfin_wdt_stop();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ else {
+ printk(KERN_CRIT PFX
+ "Unexpected close, not stopping watchdog!\n");
bfin_wdt_keepalive();
}
-
expect_close = 0;
clear_bit(0, &open_check);
-
return 0;
}
@@ -213,7 +213,7 @@ static int bfin_wdt_release(struct inode *inode, struct file *file)
* Pings the watchdog on write.
*/
static ssize_t bfin_wdt_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos)
+ size_t len, loff_t *ppos)
{
stampit();
@@ -240,7 +240,6 @@ static ssize_t bfin_wdt_write(struct file *file, const char __user *data,
/**
* bfin_wdt_ioctl - Query Device
- * @inode: inode of device
* @file: file handle of device
* @cmd: watchdog command
* @arg: argument
@@ -248,8 +247,8 @@ static ssize_t bfin_wdt_write(struct file *file, const char __user *data,
* Query basic information from the device or ping it, as outlined by the
* watchdog API.
*/
-static int bfin_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long bfin_wdt_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
@@ -257,59 +256,49 @@ static int bfin_wdt_ioctl(struct inode *inode, struct file *file,
stampit();
switch (cmd) {
- default:
- return -ENOTTY;
-
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &bfin_wdt_info, sizeof(bfin_wdt_info)))
- return -EFAULT;
- else
- return 0;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(!!(_bfin_swrst & SWRST_RESET_WDOG), p);
-
- case WDIOC_KEEPALIVE:
- bfin_wdt_keepalive();
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &bfin_wdt_info, sizeof(bfin_wdt_info)))
+ return -EFAULT;
+ else
return 0;
-
- case WDIOC_SETTIMEOUT: {
- int new_timeout;
-
- if (get_user(new_timeout, p))
- return -EFAULT;
-
- if (bfin_wdt_set_timeout(new_timeout))
- return -EINVAL;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(!!(_bfin_swrst & SWRST_RESET_WDOG), p);
+ case WDIOC_KEEPALIVE:
+ bfin_wdt_keepalive();
+ return 0;
+ case WDIOC_SETTIMEOUT: {
+ int new_timeout;
+
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+ if (bfin_wdt_set_timeout(new_timeout))
+ return -EINVAL;
+ }
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
+ case WDIOC_SETOPTIONS: {
+ unsigned long flags;
+ int options, ret = -EINVAL;
+
+ if (get_user(options, p))
+ return -EFAULT;
+
+ spin_lock_irqsave(&bfin_wdt_spinlock, flags);
+ if (options & WDIOS_DISABLECARD) {
+ bfin_wdt_stop();
+ ret = 0;
}
- /* Fall */
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
-
- case WDIOC_SETOPTIONS: {
- unsigned long flags;
- int options, ret = -EINVAL;
-
- if (get_user(options, p))
- return -EFAULT;
-
- spin_lock_irqsave(&bfin_wdt_spinlock, flags);
-
- if (options & WDIOS_DISABLECARD) {
- bfin_wdt_stop();
- ret = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- bfin_wdt_start();
- ret = 0;
- }
-
- spin_unlock_irqrestore(&bfin_wdt_spinlock, flags);
-
- return ret;
+ if (options & WDIOS_ENABLECARD) {
+ bfin_wdt_start();
+ ret = 0;
}
+ spin_unlock_irqrestore(&bfin_wdt_spinlock, flags);
+ return ret;
+ }
+ default:
+ return -ENOTTY;
}
}
@@ -322,8 +311,8 @@ static int bfin_wdt_ioctl(struct inode *inode, struct file *file,
* Handles specific events, such as turning off the watchdog during a
* shutdown event.
*/
-static int bfin_wdt_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
+static int bfin_wdt_notify_sys(struct notifier_block *this,
+ unsigned long code, void *unused)
{
stampit();
@@ -392,12 +381,12 @@ static struct platform_driver bfin_wdt_driver = {
};
static const struct file_operations bfin_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = bfin_wdt_write,
- .ioctl = bfin_wdt_ioctl,
- .open = bfin_wdt_open,
- .release = bfin_wdt_release,
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = bfin_wdt_write,
+ .unlocked_ioctl = bfin_wdt_ioctl,
+ .open = bfin_wdt_open,
+ .release = bfin_wdt_release,
};
static struct miscdevice bfin_wdt_miscdev = {
@@ -409,8 +398,8 @@ static struct miscdevice bfin_wdt_miscdev = {
static struct watchdog_info bfin_wdt_info = {
.identity = "Blackfin Watchdog",
.options = WDIOF_SETTIMEOUT |
- WDIOF_KEEPALIVEPING |
- WDIOF_MAGICCLOSE,
+ WDIOF_KEEPALIVEPING |
+ WDIOF_MAGICCLOSE,
};
static struct notifier_block bfin_wdt_notifier = {
@@ -446,14 +435,16 @@ static int __init bfin_wdt_init(void)
ret = register_reboot_notifier(&bfin_wdt_notifier);
if (ret) {
- pr_init(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", ret);
+ pr_init(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", ret);
return ret;
}
ret = misc_register(&bfin_wdt_miscdev);
if (ret) {
- pr_init(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ pr_init(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
unregister_reboot_notifier(&bfin_wdt_notifier);
return ret;
}
@@ -485,7 +476,11 @@ MODULE_LICENSE("GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
module_param(timeout, uint, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=((2^32)/SCLK), default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds. (1<=timeout<=((2^32)/SCLK), default="
+ __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 20/57] booke watchdog: clean up and unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (18 preceding siblings ...)
2008-05-19 13:06 ` [PATCH 19/57] bfin: watchdog cleanup and unlocked_ioctl Alan Cox
@ 2008-05-19 13:06 ` Alan Cox
2008-05-19 13:06 ` [PATCH 21/57] ixp2000_wdt: " Alan Cox
` (37 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:06 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/booke_wdt.c | 57 ++++++++++++++++++++++--------------------
1 files changed, 30 insertions(+), 27 deletions(-)
diff --git a/drivers/watchdog/booke_wdt.c b/drivers/watchdog/booke_wdt.c
index d362f5b..5d52d35 100644
--- a/drivers/watchdog/booke_wdt.c
+++ b/drivers/watchdog/booke_wdt.c
@@ -19,9 +19,9 @@
#include <linux/miscdevice.h>
#include <linux/notifier.h>
#include <linux/watchdog.h>
+#include <linux/uaccess.h>
#include <asm/reg_booke.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
/* If the kernel parameter wdt=1, the watchdog will be enabled at boot.
@@ -33,12 +33,12 @@
*/
#ifdef CONFIG_FSL_BOOKE
-#define WDT_PERIOD_DEFAULT 63 /* Ex. wdt_period=28 bus=333Mhz , reset=~40sec */
+#define WDT_PERIOD_DEFAULT 63 /* Ex. wdt_period=28 bus=333Mhz,reset=~40sec */
#else
#define WDT_PERIOD_DEFAULT 3 /* Refer to the PPC40x and PPC4xx manuals */
#endif /* for timing information */
-u32 booke_wdt_enabled = 0;
+u32 booke_wdt_enabled;
u32 booke_wdt_period = WDT_PERIOD_DEFAULT;
#ifdef CONFIG_FSL_BOOKE
@@ -50,7 +50,7 @@ u32 booke_wdt_period = WDT_PERIOD_DEFAULT;
/*
* booke_wdt_ping:
*/
-static __inline__ void booke_wdt_ping(void)
+static inline void booke_wdt_ping(void)
{
mtspr(SPRN_TSR, TSR_ENW|TSR_WIS);
}
@@ -58,7 +58,7 @@ static __inline__ void booke_wdt_ping(void)
/*
* booke_wdt_enable:
*/
-static __inline__ void booke_wdt_enable(void)
+static inline void booke_wdt_enable(void)
{
u32 val;
@@ -73,7 +73,7 @@ static __inline__ void booke_wdt_enable(void)
/*
* booke_wdt_write:
*/
-static ssize_t booke_wdt_write (struct file *file, const char __user *buf,
+static ssize_t booke_wdt_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
booke_wdt_ping();
@@ -81,24 +81,23 @@ static ssize_t booke_wdt_write (struct file *file, const char __user *buf,
}
static struct watchdog_info ident = {
- .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
- .firmware_version = 0,
- .identity = "PowerPC Book-E Watchdog",
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+ .firmware_version = 0,
+ .identity = "PowerPC Book-E Watchdog",
};
/*
* booke_wdt_ioctl:
*/
-static int booke_wdt_ioctl (struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long booke_wdt_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
{
u32 tmp = 0;
u32 __user *p = (u32 __user *)arg;
switch (cmd) {
case WDIOC_GETSUPPORT:
- if (copy_to_user ((struct watchdog_info __user *) arg, &ident,
- sizeof(struct watchdog_info)))
+ if (copy_to_user(arg, &ident, sizeof(struct watchdog_info)))
return -EFAULT;
case WDIOC_GETSTATUS:
return put_user(ident.options, p);
@@ -113,7 +112,8 @@ static int booke_wdt_ioctl (struct inode *inode, struct file *file,
case WDIOC_SETTIMEOUT:
if (get_user(booke_wdt_period, p))
return -EFAULT;
- mtspr(SPRN_TCR, (mfspr(SPRN_TCR)&~WDTP(0))|WDTP(booke_wdt_period));
+ mtspr(SPRN_TCR, (mfspr(SPRN_TCR) & ~WDTP(0)) |
+ WDTP(booke_wdt_period));
return 0;
case WDIOC_GETTIMEOUT:
return put_user(booke_wdt_period, p);
@@ -135,12 +135,13 @@ static int booke_wdt_ioctl (struct inode *inode, struct file *file,
/*
* booke_wdt_open:
*/
-static int booke_wdt_open (struct inode *inode, struct file *file)
+static int booke_wdt_open(struct inode *inode, struct file *file)
{
if (booke_wdt_enabled == 0) {
booke_wdt_enabled = 1;
booke_wdt_enable();
- printk (KERN_INFO "PowerPC Book-E Watchdog Timer Enabled (wdt_period=%d)\n",
+ printk(KERN_INFO
+ "PowerPC Book-E Watchdog Timer Enabled (wdt_period=%d)\n",
booke_wdt_period);
}
@@ -148,17 +149,17 @@ static int booke_wdt_open (struct inode *inode, struct file *file)
}
static const struct file_operations booke_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = booke_wdt_write,
- .ioctl = booke_wdt_ioctl,
- .open = booke_wdt_open,
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = booke_wdt_write,
+ .unlocked_ioctl = booke_wdt_ioctl,
+ .open = booke_wdt_open,
};
static struct miscdevice booke_wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &booke_wdt_fops,
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &booke_wdt_fops,
};
static void __exit booke_wdt_exit(void)
@@ -173,18 +174,20 @@ static int __init booke_wdt_init(void)
{
int ret = 0;
- printk (KERN_INFO "PowerPC Book-E Watchdog Timer Loaded\n");
+ printk(KERN_INFO "PowerPC Book-E Watchdog Timer Loaded\n");
ident.firmware_version = cur_cpu_spec->pvr_value;
ret = misc_register(&booke_wdt_miscdev);
if (ret) {
- printk (KERN_CRIT "Cannot register miscdev on minor=%d (err=%d)\n",
+ printk(KERN_CRIT
+ "Cannot register miscdev on minor=%d (err=%d)\n",
WATCHDOG_MINOR, ret);
return ret;
}
if (booke_wdt_enabled == 1) {
- printk (KERN_INFO "PowerPC Book-E Watchdog Timer Enabled (wdt_period=%d)\n",
+ printk(KERN_INFO
+ "PowerPC Book-E Watchdog Timer Enabled (wdt_period=%d)\n",
booke_wdt_period);
booke_wdt_enable();
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 21/57] ixp2000_wdt: clean up and unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (19 preceding siblings ...)
2008-05-19 13:06 ` [PATCH 20/57] booke watchdog: clean up " Alan Cox
@ 2008-05-19 13:06 ` Alan Cox
2008-05-19 13:06 ` [PATCH 22/57] ixp4xx_wdt: unlocked_ioctl Alan Cox
` (36 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:06 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/ixp2000_wdt.c | 50 ++++++++++++++++++----------------------
1 files changed, 23 insertions(+), 27 deletions(-)
diff --git a/drivers/watchdog/ixp2000_wdt.c b/drivers/watchdog/ixp2000_wdt.c
index dc7548d..943ceff 100644
--- a/drivers/watchdog/ixp2000_wdt.c
+++ b/drivers/watchdog/ixp2000_wdt.c
@@ -25,42 +25,45 @@
#include <linux/watchdog.h>
#include <linux/init.h>
#include <linux/bitops.h>
+#include <linux/uaccess.h>
#include <asm/hardware.h>
-#include <asm/uaccess.h>
static int nowayout = WATCHDOG_NOWAYOUT;
static unsigned int heartbeat = 60; /* (secs) Default is 1 minute */
static unsigned long wdt_status;
+static spinlock_t wdt_lock;
#define WDT_IN_USE 0
#define WDT_OK_TO_CLOSE 1
static unsigned long wdt_tick_rate;
-static void
-wdt_enable(void)
+static void wdt_enable(void)
{
+ spin_lock(&wdt_lock);
ixp2000_reg_write(IXP2000_RESET0, *(IXP2000_RESET0) | WDT_RESET_ENABLE);
ixp2000_reg_write(IXP2000_TWDE, WDT_ENABLE);
ixp2000_reg_write(IXP2000_T4_CLD, heartbeat * wdt_tick_rate);
ixp2000_reg_write(IXP2000_T4_CTL, TIMER_DIVIDER_256 | TIMER_ENABLE);
+ spin_unlock(&wdt_lock);
}
-static void
-wdt_disable(void)
+static void wdt_disable(void)
{
+ spin_lock(&wdt_lock);
ixp2000_reg_write(IXP2000_T4_CTL, 0);
+ spin_unlock(&wdt_lock);
}
-static void
-wdt_keepalive(void)
+static void wdt_keepalive(void)
{
+ spin_lock(&wdt_lock);
ixp2000_reg_write(IXP2000_T4_CLD, heartbeat * wdt_tick_rate);
+ spin_unlock(&wdt_lock);
}
-static int
-ixp2000_wdt_open(struct inode *inode, struct file *file)
+static int ixp2000_wdt_open(struct inode *inode, struct file *file)
{
if (test_and_set_bit(WDT_IN_USE, &wdt_status))
return -EBUSY;
@@ -72,8 +75,8 @@ ixp2000_wdt_open(struct inode *inode, struct file *file)
return nonseekable_open(inode, file);
}
-static ssize_t
-ixp2000_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+static ssize_t ixp2000_wdt_write(struct file *file, const char *data,
+ size_t len, loff_t *ppos)
{
if (len) {
if (!nowayout) {
@@ -103,9 +106,8 @@ static struct watchdog_info ident = {
.identity = "IXP2000 Watchdog",
};
-static int
-ixp2000_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long ixp2000_wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int ret = -ENOTTY;
int time;
@@ -151,16 +153,13 @@ ixp2000_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
return ret;
}
-static int
-ixp2000_wdt_release(struct inode *inode, struct file *file)
+static int ixp2000_wdt_release(struct inode *inode, struct file *file)
{
- if (test_bit(WDT_OK_TO_CLOSE, &wdt_status)) {
+ if (test_bit(WDT_OK_TO_CLOSE, &wdt_status))
wdt_disable();
- } else {
+ else
printk(KERN_CRIT "WATCHDOG: Device closed unexpectedly - "
"timer will not stop\n");
- }
-
clear_bit(WDT_IN_USE, &wdt_status);
clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
@@ -168,18 +167,16 @@ ixp2000_wdt_release(struct inode *inode, struct file *file)
}
-static const struct file_operations ixp2000_wdt_fops =
-{
+static const struct file_operations ixp2000_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = ixp2000_wdt_write,
- .ioctl = ixp2000_wdt_ioctl,
+ .unlocked_ioctl = ixp2000_wdt_ioctl,
.open = ixp2000_wdt_open,
.release = ixp2000_wdt_release,
};
-static struct miscdevice ixp2000_wdt_miscdev =
-{
+static struct miscdevice ixp2000_wdt_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &ixp2000_wdt_fops,
@@ -191,9 +188,8 @@ static int __init ixp2000_wdt_init(void)
printk(KERN_INFO "Unable to use IXP2000 watchdog due to IXP2800 erratum #25.\n");
return -EIO;
}
-
wdt_tick_rate = (*IXP2000_T1_CLD * HZ) / 256;
-
+ spin_lock_init(&wdt_lock);
return misc_register(&ixp2000_wdt_miscdev);
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 22/57] ixp4xx_wdt: unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (20 preceding siblings ...)
2008-05-19 13:06 ` [PATCH 21/57] ixp2000_wdt: " Alan Cox
@ 2008-05-19 13:06 ` Alan Cox
2008-05-19 13:06 ` [PATCH 23/57] ks8695_wdt: clean up, coding style, unlocked_ioctl Alan Cox
` (35 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:06 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/ixp4xx_wdt.c | 41 +++++++++++++++++------------------------
1 files changed, 17 insertions(+), 24 deletions(-)
diff --git a/drivers/watchdog/ixp4xx_wdt.c b/drivers/watchdog/ixp4xx_wdt.c
index 5864bb8..24e624c 100644
--- a/drivers/watchdog/ixp4xx_wdt.c
+++ b/drivers/watchdog/ixp4xx_wdt.c
@@ -30,40 +30,40 @@ static int nowayout = WATCHDOG_NOWAYOUT;
static int heartbeat = 60; /* (secs) Default is 1 minute */
static unsigned long wdt_status;
static unsigned long boot_status;
+static spin_lock_t wdt_lock;
#define WDT_TICK_RATE (IXP4XX_PERIPHERAL_BUS_CLOCK * 1000000UL)
#define WDT_IN_USE 0
#define WDT_OK_TO_CLOSE 1
-static void
-wdt_enable(void)
+static void wdt_enable(void)
{
+ spin_lock(&wdt_lock);
*IXP4XX_OSWK = IXP4XX_WDT_KEY;
*IXP4XX_OSWE = 0;
*IXP4XX_OSWT = WDT_TICK_RATE * heartbeat;
*IXP4XX_OSWE = IXP4XX_WDT_COUNT_ENABLE | IXP4XX_WDT_RESET_ENABLE;
*IXP4XX_OSWK = 0;
+ spin_unlock(&wdt_lock);
}
-static void
-wdt_disable(void)
+static void wdt_disable(void)
{
+ spin_lock(&wdt_lock);
*IXP4XX_OSWK = IXP4XX_WDT_KEY;
*IXP4XX_OSWE = 0;
*IXP4XX_OSWK = 0;
+ spin_unlock(&wdt_lock);
}
-static int
-ixp4xx_wdt_open(struct inode *inode, struct file *file)
+static int ixp4xx_wdt_open(struct inode *inode, struct file *file)
{
if (test_and_set_bit(WDT_IN_USE, &wdt_status))
return -EBUSY;
clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
-
wdt_enable();
-
return nonseekable_open(inode, file);
}
@@ -87,7 +87,6 @@ ixp4xx_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
}
wdt_enable();
}
-
return len;
}
@@ -98,9 +97,8 @@ static struct watchdog_info ident = {
};
-static int
-ixp4xx_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long ixp4xx_wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int ret = -ENOTTY;
int time;
@@ -145,16 +143,13 @@ ixp4xx_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
return ret;
}
-static int
-ixp4xx_wdt_release(struct inode *inode, struct file *file)
+static int ixp4xx_wdt_release(struct inode *inode, struct file *file)
{
- if (test_bit(WDT_OK_TO_CLOSE, &wdt_status)) {
+ if (test_bit(WDT_OK_TO_CLOSE, &wdt_status))
wdt_disable();
- } else {
+ else
printk(KERN_CRIT "WATCHDOG: Device closed unexpectedly - "
"timer will not stop\n");
- }
-
clear_bit(WDT_IN_USE, &wdt_status);
clear_bit(WDT_OK_TO_CLOSE, &wdt_status);
@@ -167,7 +162,7 @@ static const struct file_operations ixp4xx_wdt_fops =
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = ixp4xx_wdt_write,
- .ioctl = ixp4xx_wdt_ioctl,
+ .unlocked_ioctl = ixp4xx_wdt_ioctl,
.open = ixp4xx_wdt_open,
.release = ixp4xx_wdt_release,
};
@@ -191,14 +186,12 @@ static int __init ixp4xx_wdt_init(void)
return -ENODEV;
}
-
+ spin_lock_init(&wdt_lock);
+ boot_status = (*IXP4XX_OSST & IXP4XX_OSST_TIMER_WARM_RESET) ?
+ WDIOF_CARDRESET : 0;
ret = misc_register(&ixp4xx_wdt_miscdev);
if (ret == 0)
printk("IXP4xx Watchdog Timer: heartbeat %d sec\n", heartbeat);
-
- boot_status = (*IXP4XX_OSST & IXP4XX_OSST_TIMER_WARM_RESET) ?
- WDIOF_CARDRESET : 0;
-
return ret;
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 23/57] ks8695_wdt: clean up, coding style, unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (21 preceding siblings ...)
2008-05-19 13:06 ` [PATCH 22/57] ixp4xx_wdt: unlocked_ioctl Alan Cox
@ 2008-05-19 13:06 ` Alan Cox
2008-05-19 13:06 ` [PATCH 24/57] machzwd: " Alan Cox
` (34 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:06 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/ks8695_wdt.c | 119 +++++++++++++++++++++--------------------
1 files changed, 62 insertions(+), 57 deletions(-)
diff --git a/drivers/watchdog/ks8695_wdt.c b/drivers/watchdog/ks8695_wdt.c
index df5a6b8..6d052b8 100644
--- a/drivers/watchdog/ks8695_wdt.c
+++ b/drivers/watchdog/ks8695_wdt.c
@@ -19,8 +19,8 @@
#include <linux/platform_device.h>
#include <linux/types.h>
#include <linux/watchdog.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
#include <asm/arch/regs-timer.h>
@@ -31,38 +31,44 @@ static int wdt_time = WDT_DEFAULT_TIME;
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(wdt_time, int, 0);
-MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="__MODULE_STRING(WDT_DEFAULT_TIME) ")");
+MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="
+ __MODULE_STRING(WDT_DEFAULT_TIME) ")");
#ifdef CONFIG_WATCHDOG_NOWAYOUT
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
#endif
static unsigned long ks8695wdt_busy;
+static spinlock_t ks8695_lock;
/* ......................................................................... */
/*
* Disable the watchdog.
*/
-static void inline ks8695_wdt_stop(void)
+static inline void ks8695_wdt_stop(void)
{
unsigned long tmcon;
+ spin_lock(&ks8695_lock);
/* disable timer0 */
tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
__raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
+ spin_unlock(&ks8695_lock);
}
/*
* Enable and reset the watchdog.
*/
-static void inline ks8695_wdt_start(void)
+static inline void ks8695_wdt_start(void)
{
unsigned long tmcon;
unsigned long tval = wdt_time * CLOCK_TICK_RATE;
+ spin_lock(&ks8695_lock);
/* disable timer0 */
tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
__raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
@@ -73,19 +79,22 @@ static void inline ks8695_wdt_start(void)
/* re-enable timer0 */
tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
__raw_writel(tmcon | TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
+ spin_unlock(&ks8695_lock);
}
/*
* Reload the watchdog timer. (ie, pat the watchdog)
*/
-static void inline ks8695_wdt_reload(void)
+static inline void ks8695_wdt_reload(void)
{
unsigned long tmcon;
+ spin_lock(&ks8695_lock);
/* disable, then re-enable timer0 */
tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON);
__raw_writel(tmcon & ~TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
__raw_writel(tmcon | TMCON_T0EN, KS8695_TMR_VA + KS8695_TMCON);
+ spin_unlock(&ks8695_lock);
}
/*
@@ -102,7 +111,8 @@ static int ks8695_wdt_settimeout(int new_time)
if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
return -EINVAL;
- /* Set new watchdog time. It will be used when ks8695_wdt_start() is called. */
+ /* Set new watchdog time. It will be used when
+ ks8695_wdt_start() is called. */
wdt_time = new_time;
return 0;
}
@@ -128,9 +138,9 @@ static int ks8695_wdt_open(struct inode *inode, struct file *file)
*/
static int ks8695_wdt_close(struct inode *inode, struct file *file)
{
+ /* Disable the watchdog when file is closed */
if (!nowayout)
- ks8695_wdt_stop(); /* Disable the watchdog when file is closed */
-
+ ks8695_wdt_stop();
clear_bit(0, &ks8695wdt_busy);
return 0;
}
@@ -143,60 +153,52 @@ static struct watchdog_info ks8695_wdt_info = {
/*
* Handle commands from user-space.
*/
-static int ks8695_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long ks8695_wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
int new_value;
- switch(cmd) {
- case WDIOC_KEEPALIVE:
- ks8695_wdt_reload(); /* pat the watchdog */
- return 0;
-
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ks8695_wdt_info, sizeof(ks8695_wdt_info)) ? -EFAULT : 0;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_value, p))
- return -EFAULT;
-
- if (ks8695_wdt_settimeout(new_value))
- return -EINVAL;
-
- /* Enable new time value */
+ switch (cmd) {
+ case WDIOC_KEEPALIVE:
+ ks8695_wdt_reload(); /* pat the watchdog */
+ return 0;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ks8695_wdt_info,
+ sizeof(ks8695_wdt_info)) ? -EFAULT : 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_value, p))
+ return -EFAULT;
+ if (ks8695_wdt_settimeout(new_value))
+ return -EINVAL;
+ /* Enable new time value */
+ ks8695_wdt_start();
+ /* Return current value */
+ return put_user(wdt_time, p);
+ case WDIOC_GETTIMEOUT:
+ return put_user(wdt_time, p);
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_SETOPTIONS:
+ if (get_user(new_value, p))
+ return -EFAULT;
+ if (new_value & WDIOS_DISABLECARD)
+ ks8695_wdt_stop();
+ if (new_value & WDIOS_ENABLECARD)
ks8695_wdt_start();
-
- /* Return current value */
- return put_user(wdt_time, p);
-
- case WDIOC_GETTIMEOUT:
- return put_user(wdt_time, p);
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_SETOPTIONS:
- if (get_user(new_value, p))
- return -EFAULT;
-
- if (new_value & WDIOS_DISABLECARD)
- ks8695_wdt_stop();
- if (new_value & WDIOS_ENABLECARD)
- ks8695_wdt_start();
- return 0;
-
- default:
- return -ENOTTY;
+ return 0;
+ default:
+ return -ENOTTY;
}
}
/*
* Pat the watchdog whenever device is written to.
*/
-static ssize_t ks8695_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+static ssize_t ks8695_wdt_write(struct file *file, const char *data,
+ size_t len, loff_t *ppos)
{
ks8695_wdt_reload(); /* pat the watchdog */
return len;
@@ -207,7 +209,7 @@ static ssize_t ks8695_wdt_write(struct file *file, const char *data, size_t len,
static const struct file_operations ks8695wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
- .ioctl = ks8695_wdt_ioctl,
+ .unlocked_ioctl = ks8695_wdt_ioctl,
.open = ks8695_wdt_open,
.release = ks8695_wdt_close,
.write = ks8695_wdt_write,
@@ -231,7 +233,8 @@ static int __init ks8695wdt_probe(struct platform_device *pdev)
if (res)
return res;
- printk("KS8695 Watchdog Timer enabled (%d seconds%s)\n", wdt_time, nowayout ? ", nowayout" : "");
+ printk(KERN_INFO "KS8695 Watchdog Timer enabled (%d seconds%s)\n",
+ wdt_time, nowayout ? ", nowayout" : "");
return 0;
}
@@ -285,12 +288,14 @@ static struct platform_driver ks8695wdt_driver = {
static int __init ks8695_wdt_init(void)
{
- /* Check that the heartbeat value is within range; if not reset to the default */
+ spin_lock_init(&ks8695_lock);
+ /* Check that the heartbeat value is within range;
+ if not reset to the default */
if (ks8695_wdt_settimeout(wdt_time)) {
ks8695_wdt_settimeout(WDT_DEFAULT_TIME);
- pr_info("ks8695_wdt: wdt_time value must be 1 <= wdt_time <= %i, using %d\n", wdt_time, WDT_MAX_TIME);
+ pr_info("ks8695_wdt: wdt_time value must be 1 <= wdt_time <= %i, using %d\n",
+ wdt_time, WDT_MAX_TIME);
}
-
return platform_driver_register(&ks8695wdt_driver);
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 24/57] machzwd: clean up, coding style, unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (22 preceding siblings ...)
2008-05-19 13:06 ` [PATCH 23/57] ks8695_wdt: clean up, coding style, unlocked_ioctl Alan Cox
@ 2008-05-19 13:06 ` Alan Cox
2008-05-19 13:07 ` [PATCH 25/57] mixcomwd: coding style locking, unlocked_ioctl Alan Cox
` (33 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:06 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/machzwd.c | 108 ++++++++++++++++----------------------------
1 files changed, 40 insertions(+), 68 deletions(-)
diff --git a/drivers/watchdog/machzwd.c b/drivers/watchdog/machzwd.c
index 6905135..2dfc275 100644
--- a/drivers/watchdog/machzwd.c
+++ b/drivers/watchdog/machzwd.c
@@ -40,9 +40,9 @@
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
/* ports */
@@ -95,7 +95,9 @@ MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
#define PFX "machzwd"
@@ -114,7 +116,7 @@ static struct watchdog_info zf_info = {
* 3 = GEN_SCI
* defaults to GEN_RESET (0)
*/
-static int action = 0;
+static int action;
module_param(action, int, 0);
MODULE_PARM_DESC(action, "after watchdog resets, generate: 0 = RESET(*) 1 = SMI 2 = NMI 3 = SCI");
@@ -123,10 +125,9 @@ static void zf_ping(unsigned long data);
static int zf_action = GEN_RESET;
static unsigned long zf_is_open;
static char zf_expect_close;
-static DEFINE_SPINLOCK(zf_lock);
static DEFINE_SPINLOCK(zf_port_lock);
static DEFINE_TIMER(zf_timer, zf_ping, 0, 0);
-static unsigned long next_heartbeat = 0;
+static unsigned long next_heartbeat;
/* timeout for user land heart beat (10 seconds) */
@@ -171,13 +172,13 @@ static inline void zf_set_control(unsigned short new)
static inline void zf_set_timer(unsigned short new, unsigned char n)
{
- switch(n){
- case WD1:
- zf_writew(COUNTER_1, new);
- case WD2:
- zf_writeb(COUNTER_2, new > 0xff ? 0xff : new);
- default:
- return;
+ switch (n) {
+ case WD1:
+ zf_writew(COUNTER_1, new);
+ case WD2:
+ zf_writeb(COUNTER_2, new > 0xff ? 0xff : new);
+ default:
+ return;
}
}
@@ -241,10 +242,8 @@ static void zf_ping(unsigned long data)
zf_writeb(COUNTER_2, 0xff);
- if(time_before(jiffies, next_heartbeat)){
-
+ if (time_before(jiffies, next_heartbeat)) {
dprintk("time_before: %ld\n", next_heartbeat - jiffies);
-
/*
* reset event is activated by transition from 0 to 1 on
* RESET_WD1 bit and we assume that it is already zero...
@@ -261,24 +260,21 @@ static void zf_ping(unsigned long data)
spin_unlock_irqrestore(&zf_port_lock, flags);
mod_timer(&zf_timer, jiffies + ZF_HW_TIMEO);
- }else{
+ } else
printk(KERN_CRIT PFX ": I will reset your machine\n");
- }
}
static ssize_t zf_write(struct file *file, const char __user *buf, size_t count,
loff_t *ppos)
{
/* See if we got the magic character */
- if(count){
-
+ if (count) {
/*
* no need to check for close confirmation
* no way to disable watchdog ;)
*/
if (!nowayout) {
size_t ofs;
-
/*
* note: just in case someone wrote the magic character
* five months ago...
@@ -286,11 +282,11 @@ static ssize_t zf_write(struct file *file, const char __user *buf, size_t count,
zf_expect_close = 0;
/* now scan */
- for (ofs = 0; ofs != count; ofs++){
+ for (ofs = 0; ofs != count; ofs++) {
char c;
if (get_user(c, buf + ofs))
return -EFAULT;
- if (c == 'V'){
+ if (c == 'V') {
zf_expect_close = 42;
dprintk("zf_expect_close = 42\n");
}
@@ -303,14 +299,11 @@ static ssize_t zf_write(struct file *file, const char __user *buf, size_t count,
*/
next_heartbeat = jiffies + ZF_USER_TIMEO;
dprintk("user ping at %ld\n", jiffies);
-
}
-
return count;
}
-static int zf_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long zf_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
@@ -319,55 +312,38 @@ static int zf_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
if (copy_to_user(argp, &zf_info, sizeof(zf_info)))
return -EFAULT;
break;
-
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
return put_user(0, p);
-
case WDIOC_KEEPALIVE:
zf_ping(0);
break;
-
default:
return -ENOTTY;
}
-
return 0;
}
static int zf_open(struct inode *inode, struct file *file)
{
- spin_lock(&zf_lock);
- if(test_and_set_bit(0, &zf_is_open)) {
- spin_unlock(&zf_lock);
+ if (test_and_set_bit(0, &zf_is_open))
return -EBUSY;
- }
-
if (nowayout)
__module_get(THIS_MODULE);
-
- spin_unlock(&zf_lock);
-
zf_timer_on();
-
return nonseekable_open(inode, file);
}
static int zf_close(struct inode *inode, struct file *file)
{
- if(zf_expect_close == 42){
+ if (zf_expect_close == 42)
zf_timer_off();
- } else {
+ else {
del_timer(&zf_timer);
printk(KERN_ERR PFX ": device file closed unexpectedly. Will not stop the WDT!\n");
}
-
- spin_lock(&zf_lock);
clear_bit(0, &zf_is_open);
- spin_unlock(&zf_lock);
-
zf_expect_close = 0;
-
return 0;
}
@@ -378,23 +354,18 @@ static int zf_close(struct inode *inode, struct file *file)
static int zf_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
- if(code == SYS_DOWN || code == SYS_HALT){
+ if (code == SYS_DOWN || code == SYS_HALT)
zf_timer_off();
- }
-
return NOTIFY_DONE;
}
-
-
-
static const struct file_operations zf_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = zf_write,
- .ioctl = zf_ioctl,
- .open = zf_open,
- .release = zf_close,
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = zf_write,
+ .unlocked_ioctl = zf_ioctl,
+ .open = zf_open,
+ .release = zf_close,
};
static struct miscdevice zf_miscdev = {
@@ -402,7 +373,7 @@ static struct miscdevice zf_miscdev = {
.name = "watchdog",
.fops = &zf_fops,
};
-
+
/*
* The device needs to learn about soft shutdowns in order to
@@ -423,22 +394,23 @@ static int __init zf_init(void)
{
int ret;
- printk(KERN_INFO PFX ": MachZ ZF-Logic Watchdog driver initializing.\n");
+ printk(KERN_INFO PFX
+ ": MachZ ZF-Logic Watchdog driver initializing.\n");
ret = zf_get_ZFL_version();
- if ((!ret) || (ret == 0xffff)) {
+ if (!ret || ret == 0xffff) {
printk(KERN_WARNING PFX ": no ZF-Logic found\n");
return -ENODEV;
}
- if((action <= 3) && (action >= 0)){
- zf_action = zf_action>>action;
- } else
+ if (action <= 3 && action >= 0)
+ zf_action = zf_action >> action;
+ else
action = 0;
zf_show_action(action);
- if(!request_region(ZF_IOBASE, 3, "MachZ ZFL WDT")){
+ if (!request_region(ZF_IOBASE, 3, "MachZ ZFL WDT")) {
printk(KERN_ERR "cannot reserve I/O ports at %d\n",
ZF_IOBASE);
ret = -EBUSY;
@@ -446,14 +418,14 @@ static int __init zf_init(void)
}
ret = register_reboot_notifier(&zf_notifier);
- if(ret){
+ if (ret) {
printk(KERN_ERR "can't register reboot notifier (err=%d)\n",
ret);
goto no_reboot;
}
ret = misc_register(&zf_miscdev);
- if (ret){
+ if (ret) {
printk(KERN_ERR "can't misc_register on minor=%d\n",
WATCHDOG_MINOR);
goto no_misc;
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 25/57] mixcomwd: coding style locking, unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (23 preceding siblings ...)
2008-05-19 13:06 ` [PATCH 24/57] machzwd: " Alan Cox
@ 2008-05-19 13:07 ` Alan Cox
2008-05-19 13:07 ` [PATCH 26/57] mpc watchdog: clean up and locking Alan Cox
` (32 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:07 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/mixcomwd.c | 133 ++++++++++++++++++++-----------------------
1 files changed, 63 insertions(+), 70 deletions(-)
diff --git a/drivers/watchdog/mixcomwd.c b/drivers/watchdog/mixcomwd.c
index 1adf1d5..2248a81 100644
--- a/drivers/watchdog/mixcomwd.c
+++ b/drivers/watchdog/mixcomwd.c
@@ -29,7 +29,8 @@
* - support for one more type board
*
* Version 0.5 (2001/12/14) Matt Domsch <Matt_Domsch@dell.com>
- * - added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
+ * - added nowayout module option to override
+ * CONFIG_WATCHDOG_NOWAYOUT
*
* Version 0.6 (2002/04/12): Rob Radez <rob@osinvestor.com>
* - make mixcomwd_opened unsigned,
@@ -53,8 +54,8 @@
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/timer.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
/*
* We have two types of cards that can be probed:
@@ -108,18 +109,19 @@ static char expect_close;
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
static void mixcomwd_ping(void)
{
- outb_p(55,watchdog_port);
+ outb_p(55, watchdog_port);
return;
}
static void mixcomwd_timerfun(unsigned long d)
{
mixcomwd_ping();
-
mod_timer(&mixcomwd_timer, jiffies + 5 * HZ);
}
@@ -129,22 +131,22 @@ static void mixcomwd_timerfun(unsigned long d)
static int mixcomwd_open(struct inode *inode, struct file *file)
{
- if(test_and_set_bit(0,&mixcomwd_opened)) {
+ if (test_and_set_bit(0, &mixcomwd_opened))
return -EBUSY;
- }
+
mixcomwd_ping();
- if (nowayout) {
+ if (nowayout)
/*
* fops_get() code via open() has already done
* a try_module_get() so it is safe to do the
* __module_get().
*/
__module_get(THIS_MODULE);
- } else {
- if(mixcomwd_timer_alive) {
+ else {
+ if (mixcomwd_timer_alive) {
del_timer(&mixcomwd_timer);
- mixcomwd_timer_alive=0;
+ mixcomwd_timer_alive = 0;
}
}
return nonseekable_open(inode, file);
@@ -153,26 +155,27 @@ static int mixcomwd_open(struct inode *inode, struct file *file)
static int mixcomwd_release(struct inode *inode, struct file *file)
{
if (expect_close == 42) {
- if(mixcomwd_timer_alive) {
- printk(KERN_ERR PFX "release called while internal timer alive");
+ if (mixcomwd_timer_alive) {
+ printk(KERN_ERR PFX
+ "release called while internal timer alive");
return -EBUSY;
}
- mixcomwd_timer_alive=1;
+ mixcomwd_timer_alive = 1;
mod_timer(&mixcomwd_timer, jiffies + 5 * HZ);
- } else {
- printk(KERN_CRIT PFX "WDT device closed unexpectedly. WDT will not stop!\n");
- }
+ } else
+ printk(KERN_CRIT PFX
+ "WDT device closed unexpectedly. WDT will not stop!\n");
- clear_bit(0,&mixcomwd_opened);
- expect_close=0;
+ clear_bit(0, &mixcomwd_opened);
+ expect_close = 0;
return 0;
}
-static ssize_t mixcomwd_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
+static ssize_t mixcomwd_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
{
- if(len)
- {
+ if (len) {
if (!nowayout) {
size_t i;
@@ -192,8 +195,8 @@ static ssize_t mixcomwd_write(struct file *file, const char __user *data, size_t
return len;
}
-static int mixcomwd_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long mixcomwd_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
@@ -204,32 +207,23 @@ static int mixcomwd_ioctl(struct inode *inode, struct file *file,
.identity = "MixCOM watchdog",
};
- switch(cmd)
- {
- case WDIOC_GETSTATUS:
- status=mixcomwd_opened;
- if (!nowayout) {
- status|=mixcomwd_timer_alive;
- }
- if (copy_to_user(p, &status, sizeof(int))) {
- return -EFAULT;
- }
- break;
- case WDIOC_GETBOOTSTATUS:
- if (copy_to_user(p, &status, sizeof(int))) {
- return -EFAULT;
- }
- break;
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof(ident))) {
- return -EFAULT;
- }
- break;
- case WDIOC_KEEPALIVE:
- mixcomwd_ping();
- break;
- default:
- return -ENOTTY;
+ switch (cmd) {
+ case WDIOC_GETSTATUS:
+ status = mixcomwd_opened;
+ if (!nowayout)
+ status |= mixcomwd_timer_alive;
+ return put_user(status, p);
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ break;
+ case WDIOC_KEEPALIVE:
+ mixcomwd_ping();
+ break;
+ default:
+ return -ENOTTY;
}
return 0;
}
@@ -238,7 +232,7 @@ static const struct file_operations mixcomwd_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = mixcomwd_write,
- .ioctl = mixcomwd_ioctl,
+ .unlocked_ioctl = mixcomwd_ioctl,
.open = mixcomwd_open,
.release = mixcomwd_release,
};
@@ -253,15 +247,14 @@ static int __init checkcard(int port, int card_id)
{
int id;
- if (!request_region(port, 1, "MixCOM watchdog")) {
+ if (!request_region(port, 1, "MixCOM watchdog"))
return 0;
- }
- id=inb_p(port);
- if (card_id==MIXCOM_ID)
+ id = inb_p(port);
+ if (card_id == MIXCOM_ID)
id &= 0x3f;
- if (id!=card_id) {
+ if (id != card_id) {
release_region(port, 1);
return 0;
}
@@ -270,9 +263,7 @@ static int __init checkcard(int port, int card_id)
static int __init mixcomwd_init(void)
{
- int i;
- int ret;
- int found=0;
+ int i, ret, found = 0;
for (i = 0; !found && mixcomwd_io_info[i].ioport != 0; i++) {
if (checkcard(mixcomwd_io_info[i].ioport,
@@ -283,20 +274,22 @@ static int __init mixcomwd_init(void)
}
if (!found) {
- printk(KERN_ERR PFX "No card detected, or port not available.\n");
+ printk(KERN_ERR PFX
+ "No card detected, or port not available.\n");
return -ENODEV;
}
ret = misc_register(&mixcomwd_miscdev);
- if (ret)
- {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ if (ret) {
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
goto error_misc_register_watchdog;
}
- printk(KERN_INFO "MixCOM watchdog driver v%s, watchdog port at 0x%3x\n",
- VERSION, watchdog_port);
+ printk(KERN_INFO
+ "MixCOM watchdog driver v%s, watchdog port at 0x%3x\n",
+ VERSION, watchdog_port);
return 0;
@@ -309,15 +302,15 @@ error_misc_register_watchdog:
static void __exit mixcomwd_exit(void)
{
if (!nowayout) {
- if(mixcomwd_timer_alive) {
+ if (mixcomwd_timer_alive) {
printk(KERN_WARNING PFX "I quit now, hardware will"
" probably reboot!\n");
del_timer_sync(&mixcomwd_timer);
- mixcomwd_timer_alive=0;
+ mixcomwd_timer_alive = 0;
}
}
misc_deregister(&mixcomwd_miscdev);
- release_region(watchdog_port,1);
+ release_region(watchdog_port, 1);
}
module_init(mixcomwd_init);
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 26/57] mpc watchdog: clean up and locking
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (24 preceding siblings ...)
2008-05-19 13:07 ` [PATCH 25/57] mixcomwd: coding style locking, unlocked_ioctl Alan Cox
@ 2008-05-19 13:07 ` Alan Cox
2008-05-19 13:07 ` [PATCH 27/57] mpcore watchdog: unlocked_ioctl and BKl work Alan Cox
` (31 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:07 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/mpc5200_wdt.c | 20 ++++++++++++--------
drivers/watchdog/mpc83xx_wdt.c | 19 ++++++++++---------
drivers/watchdog/mpc8xx_wdt.c | 37 +++++++++++++++++++------------------
3 files changed, 41 insertions(+), 35 deletions(-)
diff --git a/drivers/watchdog/mpc5200_wdt.c b/drivers/watchdog/mpc5200_wdt.c
index 80a91d4..ce1811d 100644
--- a/drivers/watchdog/mpc5200_wdt.c
+++ b/drivers/watchdog/mpc5200_wdt.c
@@ -4,8 +4,8 @@
#include <linux/watchdog.h>
#include <linux/io.h>
#include <linux/spinlock.h>
-#include <asm/of_platform.h>
-#include <asm/uaccess.h>
+#include <linux/of_platform.h>
+#include <linux/uaccess.h>
#include <asm/mpc52xx.h>
@@ -57,7 +57,8 @@ static int mpc5200_wdt_start(struct mpc5200_wdt *wdt)
/* set timeout, with maximum prescaler */
out_be32(&wdt->regs->count, 0x0 | wdt->count);
/* enable watchdog */
- out_be32(&wdt->regs->mode, GPT_MODE_CE | GPT_MODE_WDT | GPT_MODE_MS_TIMER);
+ out_be32(&wdt->regs->mode, GPT_MODE_CE | GPT_MODE_WDT |
+ GPT_MODE_MS_TIMER);
spin_unlock(&wdt->io_lock);
return 0;
@@ -66,7 +67,8 @@ static int mpc5200_wdt_ping(struct mpc5200_wdt *wdt)
{
spin_lock(&wdt->io_lock);
/* writing A5 to OCPW resets the watchdog */
- out_be32(&wdt->regs->mode, 0xA5000000 | (0xffffff & in_be32(&wdt->regs->mode)));
+ out_be32(&wdt->regs->mode, 0xA5000000 |
+ (0xffffff & in_be32(&wdt->regs->mode)));
spin_unlock(&wdt->io_lock);
return 0;
}
@@ -92,8 +94,8 @@ static struct watchdog_info mpc5200_wdt_info = {
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
.identity = "mpc5200 watchdog on GPT0",
};
-static int mpc5200_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long mpc5200_wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
struct mpc5200_wdt *wdt = file->private_data;
int __user *data = (int __user *)arg;
@@ -103,7 +105,7 @@ static int mpc5200_wdt_ioctl(struct inode *inode, struct file *file,
switch (cmd) {
case WDIOC_GETSUPPORT:
ret = copy_to_user(data, &mpc5200_wdt_info,
- sizeof(mpc5200_wdt_info));
+ sizeof(mpc5200_wdt_info));
if (ret)
ret = -EFAULT;
break;
@@ -135,6 +137,7 @@ static int mpc5200_wdt_ioctl(struct inode *inode, struct file *file,
}
return ret;
}
+
static int mpc5200_wdt_open(struct inode *inode, struct file *file)
{
/* /dev/watchdog can only be opened once */
@@ -167,7 +170,8 @@ static const struct file_operations mpc5200_wdt_fops = {
};
/* module operations */
-static int mpc5200_wdt_probe(struct of_device *op, const struct of_device_id *match)
+static int mpc5200_wdt_probe(struct of_device *op,
+ const struct of_device_id *match)
{
struct mpc5200_wdt *wdt;
int err;
diff --git a/drivers/watchdog/mpc83xx_wdt.c b/drivers/watchdog/mpc83xx_wdt.c
index b16c5cd..109eea0 100644
--- a/drivers/watchdog/mpc83xx_wdt.c
+++ b/drivers/watchdog/mpc83xx_wdt.c
@@ -22,8 +22,8 @@
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/watchdog.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
struct mpc83xx_wdt {
__be32 res0;
@@ -42,11 +42,13 @@ static struct mpc83xx_wdt __iomem *wd_base;
static u16 timeout = 0xffff;
module_param(timeout, ushort, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in ticks. (0<timeout<65536, default=65535");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in ticks. (0<timeout<65536, default=65535");
static int reset = 1;
module_param(reset, bool, 0);
-MODULE_PARM_DESC(reset, "Watchdog Interrupt/Reset Mode. 0 = interrupt, 1 = reset");
+MODULE_PARM_DESC(reset,
+ "Watchdog Interrupt/Reset Mode. 0 = interrupt, 1 = reset");
/*
* We always prescale, but if someone really doesn't want to they can set this
@@ -105,8 +107,8 @@ static int mpc83xx_wdt_release(struct inode *inode, struct file *file)
return 0;
}
-static int mpc83xx_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long mpc83xx_wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
@@ -136,7 +138,7 @@ static const struct file_operations mpc83xx_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = mpc83xx_wdt_write,
- .ioctl = mpc83xx_wdt_ioctl,
+ .unlocked_ioctl = mpc83xx_wdt_ioctl,
.open = mpc83xx_wdt_open,
.release = mpc83xx_wdt_release,
};
@@ -161,8 +163,7 @@ static int __devinit mpc83xx_wdt_probe(struct platform_device *dev)
goto err_out;
}
- wd_base = ioremap(r->start, sizeof (struct mpc83xx_wdt));
-
+ wd_base = ioremap(r->start, sizeof(struct mpc83xx_wdt));
if (wd_base == NULL) {
ret = -ENOMEM;
goto err_out;
diff --git a/drivers/watchdog/mpc8xx_wdt.c b/drivers/watchdog/mpc8xx_wdt.c
index 85b5734..1336425 100644
--- a/drivers/watchdog/mpc8xx_wdt.c
+++ b/drivers/watchdog/mpc8xx_wdt.c
@@ -16,36 +16,35 @@
#include <linux/module.h>
#include <linux/watchdog.h>
#include <asm/8xx_immap.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
#include <syslib/m8xx_wdt.h>
static unsigned long wdt_opened;
static int wdt_status;
+static spinlock_t wdt_lock;
static void mpc8xx_wdt_handler_disable(void)
{
volatile uint __iomem *piscr;
- piscr = (uint *)&((immap_t*)IMAP_ADDR)->im_sit.sit_piscr;
+ piscr = (uint *)&((immap_t *)IMAP_ADDR)->im_sit.sit_piscr;
if (!m8xx_has_internal_rtc)
m8xx_wdt_stop_timer();
else
out_be32(piscr, in_be32(piscr) & ~(PISCR_PIE | PISCR_PTE));
-
printk(KERN_NOTICE "mpc8xx_wdt: keep-alive handler deactivated\n");
}
static void mpc8xx_wdt_handler_enable(void)
{
volatile uint __iomem *piscr;
- piscr = (uint *)&((immap_t*)IMAP_ADDR)->im_sit.sit_piscr;
+ piscr = (uint *)&((immap_t *)IMAP_ADDR)->im_sit.sit_piscr;
if (!m8xx_has_internal_rtc)
m8xx_wdt_install_timer();
else
out_be32(piscr, in_be32(piscr) | PISCR_PIE | PISCR_PTE);
-
printk(KERN_NOTICE "mpc8xx_wdt: keep-alive handler activated\n");
}
@@ -53,37 +52,34 @@ static int mpc8xx_wdt_open(struct inode *inode, struct file *file)
{
if (test_and_set_bit(0, &wdt_opened))
return -EBUSY;
-
m8xx_wdt_reset();
mpc8xx_wdt_handler_disable();
-
return nonseekable_open(inode, file);
}
static int mpc8xx_wdt_release(struct inode *inode, struct file *file)
{
m8xx_wdt_reset();
-
#if !defined(CONFIG_WATCHDOG_NOWAYOUT)
mpc8xx_wdt_handler_enable();
#endif
-
clear_bit(0, &wdt_opened);
-
return 0;
}
-static ssize_t mpc8xx_wdt_write(struct file *file, const char *data, size_t len,
- loff_t * ppos)
+static ssize_t mpc8xx_wdt_write(struct file *file, const char *data,
+ size_t len, loff_t *ppos)
{
- if (len)
+ if (len) {
+ spin_lock(&wdt_lock);
m8xx_wdt_reset();
-
+ spin_unlock(&wdt_lock);
+ }
return len;
}
-static int mpc8xx_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long mpc8xx_wdt_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
{
int timeout;
static struct watchdog_info info = {
@@ -112,15 +108,19 @@ static int mpc8xx_wdt_ioctl(struct inode *inode, struct file *file,
return -EOPNOTSUPP;
case WDIOC_KEEPALIVE:
+ spin_lock(&wdt_lock);
m8xx_wdt_reset();
wdt_status |= WDIOF_KEEPALIVEPING;
+ spin_unlock(&wdt_lock);
break;
case WDIOC_SETTIMEOUT:
return -EOPNOTSUPP;
case WDIOC_GETTIMEOUT:
+ spin_lock(&wdt_lock);
timeout = m8xx_wdt_get_timeout();
+ spin_unlock(&wdt_lock);
if (put_user(timeout, (int *)arg))
return -EFAULT;
break;
@@ -136,7 +136,7 @@ static const struct file_operations mpc8xx_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = mpc8xx_wdt_write,
- .ioctl = mpc8xx_wdt_ioctl,
+ .unlocked_ioctl = mpc8xx_wdt_ioctl,
.open = mpc8xx_wdt_open,
.release = mpc8xx_wdt_release,
};
@@ -149,6 +149,7 @@ static struct miscdevice mpc8xx_wdt_miscdev = {
static int __init mpc8xx_wdt_init(void)
{
+ spin_lock_init(&wdt_lock);
return misc_register(&mpc8xx_wdt_miscdev);
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 27/57] mpcore watchdog: unlocked_ioctl and BKl work
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (25 preceding siblings ...)
2008-05-19 13:07 ` [PATCH 26/57] mpc watchdog: clean up and locking Alan Cox
@ 2008-05-19 13:07 ` Alan Cox
2008-05-19 13:07 ` [PATCH 28/57] mtx-1_wdt: clean up, coding style, unlocked ioctl Alan Cox
` (30 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:07 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/mpcore_wdt.c | 53 +++++++++++++++++++++++++----------------
1 files changed, 32 insertions(+), 21 deletions(-)
diff --git a/drivers/watchdog/mpcore_wdt.c b/drivers/watchdog/mpcore_wdt.c
index 009573b..5e58f8b 100644
--- a/drivers/watchdog/mpcore_wdt.c
+++ b/drivers/watchdog/mpcore_wdt.c
@@ -29,9 +29,9 @@
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
+#include <linux/uaccess.h>
#include <asm/hardware/arm_twd.h>
-#include <asm/uaccess.h>
struct mpcore_wdt {
unsigned long timer_alive;
@@ -43,17 +43,20 @@ struct mpcore_wdt {
};
static struct platform_device *mpcore_wdt_dev;
-
extern unsigned int mpcore_timer_rate;
#define TIMER_MARGIN 60
static int mpcore_margin = TIMER_MARGIN;
module_param(mpcore_margin, int, 0);
-MODULE_PARM_DESC(mpcore_margin, "MPcore timer margin in seconds. (0<mpcore_margin<65536, default=" __MODULE_STRING(TIMER_MARGIN) ")");
+MODULE_PARM_DESC(mpcore_margin,
+ "MPcore timer margin in seconds. (0 < mpcore_margin < 65536, default="
+ __MODULE_STRING(TIMER_MARGIN) ")");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
#define ONLY_TESTING 0
static int mpcore_noboot = ONLY_TESTING;
@@ -70,14 +73,12 @@ static irqreturn_t mpcore_wdt_fire(int irq, void *arg)
/* Check it really was our interrupt */
if (readl(wdt->base + TWD_WDOG_INTSTAT)) {
- dev_printk(KERN_CRIT, wdt->dev, "Triggered - Reboot ignored.\n");
-
+ dev_printk(KERN_CRIT, wdt->dev,
+ "Triggered - Reboot ignored.\n");
/* Clear the interrupt on the watchdog */
writel(1, wdt->base + TWD_WDOG_INTSTAT);
-
return IRQ_HANDLED;
}
-
return IRQ_NONE;
}
@@ -96,22 +97,26 @@ static void mpcore_wdt_keepalive(struct mpcore_wdt *wdt)
count = (mpcore_timer_rate / 256) * mpcore_margin;
/* Reload the counter */
+ spin_lock(&wdt_lock);
writel(count + wdt->perturb, wdt->base + TWD_WDOG_LOAD);
-
wdt->perturb = wdt->perturb ? 0 : 1;
+ spin_unlock(&wdt_lock);
}
static void mpcore_wdt_stop(struct mpcore_wdt *wdt)
{
+ spin_lock(&wdt_lock);
writel(0x12345678, wdt->base + TWD_WDOG_DISABLE);
writel(0x87654321, wdt->base + TWD_WDOG_DISABLE);
writel(0x0, wdt->base + TWD_WDOG_CONTROL);
+ spin_unlock(&wdt_lock);
}
static void mpcore_wdt_start(struct mpcore_wdt *wdt)
{
dev_printk(KERN_INFO, wdt->dev, "enabling watchdog.\n");
+ spin_lock(&wdt_lock);
/* This loads the count register but does NOT start the count yet */
mpcore_wdt_keepalive(wdt);
@@ -122,6 +127,7 @@ static void mpcore_wdt_start(struct mpcore_wdt *wdt)
/* Enable watchdog - prescale=256, watchdog mode=1, enable=1 */
writel(0x0000FF09, wdt->base + TWD_WDOG_CONTROL);
}
+ spin_unlock(&wdt_lock);
}
static int mpcore_wdt_set_heartbeat(int t)
@@ -164,10 +170,11 @@ static int mpcore_wdt_release(struct inode *inode, struct file *file)
* Shut off the timer.
* Lock it in if it's a module and we set nowayout
*/
- if (wdt->expect_close == 42) {
+ if (wdt->expect_close == 42)
mpcore_wdt_stop(wdt);
- } else {
- dev_printk(KERN_CRIT, wdt->dev, "unexpected close, not stopping watchdog!\n");
+ else {
+ dev_printk(KERN_CRIT, wdt->dev,
+ "unexpected close, not stopping watchdog!\n");
mpcore_wdt_keepalive(wdt);
}
clear_bit(0, &wdt->timer_alive);
@@ -175,7 +182,8 @@ static int mpcore_wdt_release(struct inode *inode, struct file *file)
return 0;
}
-static ssize_t mpcore_wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+static ssize_t mpcore_wdt_write(struct file *file, const char *data,
+ size_t len, loff_t *ppos)
{
struct mpcore_wdt *wdt = file->private_data;
@@ -210,8 +218,8 @@ static struct watchdog_info ident = {
.identity = "MPcore Watchdog",
};
-static int mpcore_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long mpcore_wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
struct mpcore_wdt *wdt = file->private_data;
int ret;
@@ -301,7 +309,7 @@ static const struct file_operations mpcore_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = mpcore_wdt_write,
- .ioctl = mpcore_wdt_ioctl,
+ .unlocked_ioctl = mpcore_wdt_ioctl,
.open = mpcore_wdt_open,
.release = mpcore_wdt_release,
};
@@ -349,14 +357,17 @@ static int __devinit mpcore_wdt_probe(struct platform_device *dev)
mpcore_wdt_miscdev.parent = &dev->dev;
ret = misc_register(&mpcore_wdt_miscdev);
if (ret) {
- dev_printk(KERN_ERR, _dev, "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ dev_printk(KERN_ERR, _dev,
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
goto err_misc;
}
- ret = request_irq(wdt->irq, mpcore_wdt_fire, IRQF_DISABLED, "mpcore_wdt", wdt);
+ ret = request_irq(wdt->irq, mpcore_wdt_fire, IRQF_DISABLED,
+ "mpcore_wdt", wdt);
if (ret) {
- dev_printk(KERN_ERR, _dev, "cannot register IRQ%d for watchdog\n", wdt->irq);
+ dev_printk(KERN_ERR, _dev,
+ "cannot register IRQ%d for watchdog\n", wdt->irq);
goto err_irq;
}
@@ -415,7 +426,7 @@ static int __init mpcore_wdt_init(void)
*/
if (mpcore_wdt_set_heartbeat(mpcore_margin)) {
mpcore_wdt_set_heartbeat(TIMER_MARGIN);
- printk(KERN_INFO "mpcore_margin value must be 0<mpcore_margin<65536, using %d\n",
+ printk(KERN_INFO "mpcore_margin value must be 0 < mpcore_margin < 65536, using %d\n",
TIMER_MARGIN);
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 28/57] mtx-1_wdt: clean up, coding style, unlocked ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (26 preceding siblings ...)
2008-05-19 13:07 ` [PATCH 27/57] mpcore watchdog: unlocked_ioctl and BKl work Alan Cox
@ 2008-05-19 13:07 ` Alan Cox
2008-05-20 15:08 ` Florian Fainelli
2008-05-19 13:07 ` [PATCH 29/57] mv64x60_wdt: clean up and locking checks Alan Cox
` (29 subsequent siblings)
57 siblings, 1 reply; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:07 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/mtx-1_wdt.c | 107 ++++++++++++++++++++----------------------
1 files changed, 52 insertions(+), 55 deletions(-)
diff --git a/drivers/watchdog/mtx-1_wdt.c b/drivers/watchdog/mtx-1_wdt.c
index a8e6738..e0b8cdf 100644
--- a/drivers/watchdog/mtx-1_wdt.c
+++ b/drivers/watchdog/mtx-1_wdt.c
@@ -1,7 +1,8 @@
/*
* Driver for the MTX-1 Watchdog.
*
- * (C) Copyright 2005 4G Systems <info@4g-systems.biz>, All Rights Reserved.
+ * (C) Copyright 2005 4G Systems <info@4g-systems.biz>,
+ * All Rights Reserved.
* http://www.4g-systems.biz
*
* (C) Copyright 2007 OpenWrt.org, Florian Fainelli <florian@openwrt.org>
@@ -46,12 +47,11 @@
#include <linux/jiffies.h>
#include <linux/watchdog.h>
#include <linux/platform_device.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <linux/gpio.h>
#include <asm/mach-au1x00/au1000.h>
-#include <asm/gpio.h>
#define MTX1_WDT_INTERVAL (5 * HZ)
@@ -59,6 +59,7 @@ static int ticks = 100 * HZ;
static struct {
struct completion stop;
+ spinlock_t lock;
int running;
struct timer_list timer;
int queue;
@@ -71,6 +72,7 @@ static void mtx1_wdt_trigger(unsigned long unused)
{
u32 tmp;
+ spin_lock(&mtx1_wdt_device.lock);
if (mtx1_wdt_device.running)
ticks--;
/*
@@ -79,13 +81,13 @@ static void mtx1_wdt_trigger(unsigned long unused)
tmp = au_readl(GPIO2_DIR);
tmp = (tmp & ~(1 << mtx1_wdt_device.gpio)) |
((~tmp) & (1 << mtx1_wdt_device.gpio));
- au_writel (tmp, GPIO2_DIR);
+ au_writel(tmp, GPIO2_DIR);
if (mtx1_wdt_device.queue && ticks)
mod_timer(&mtx1_wdt_device.timer, jiffies + MTX1_WDT_INTERVAL);
- else {
+ else
complete(&mtx1_wdt_device.stop);
- }
+ spin_unlock(&mtx1_wdt_device.lock);
}
static void mtx1_wdt_reset(void)
@@ -96,23 +98,25 @@ static void mtx1_wdt_reset(void)
static void mtx1_wdt_start(void)
{
+ spin_lock_irqsave(&mtx1_wdt_device.lock, flags);
if (!mtx1_wdt_device.queue) {
mtx1_wdt_device.queue = 1;
gpio_set_value(mtx1_wdt_device.gpio, 1);
mod_timer(&mtx1_wdt_device.timer, jiffies + MTX1_WDT_INTERVAL);
}
mtx1_wdt_device.running++;
+ spin_unlock_irqrestore(&mtx1_wdt_device.lock, flags);
}
static int mtx1_wdt_stop(void)
{
+ spin_lock_irqsave(&mtx1_wdt_device.lock, flags);
if (mtx1_wdt_device.queue) {
mtx1_wdt_device.queue = 0;
gpio_set_value(mtx1_wdt_device.gpio, 0);
}
-
ticks = mtx1_wdt_device.default_ticks;
-
+ spin_unlock_irqrestore(&mtx1_wdt_device.lock, flags);
return 0;
}
@@ -122,7 +126,6 @@ static int mtx1_wdt_open(struct inode *inode, struct file *file)
{
if (test_and_set_bit(0, &mtx1_wdt_device.inuse))
return -EBUSY;
-
return nonseekable_open(inode, file);
}
@@ -133,54 +136,51 @@ static int mtx1_wdt_release(struct inode *inode, struct file *file)
return 0;
}
-static int mtx1_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+static long mtx1_wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
void __user *argp = (void __user *)arg;
+ int __user *p = (int __user *)argp;
unsigned int value;
- static struct watchdog_info ident =
- {
+ static const struct watchdog_info ident = {
.options = WDIOF_CARDRESET,
.identity = "MTX-1 WDT",
};
- switch(cmd) {
- case WDIOC_KEEPALIVE:
- mtx1_wdt_reset();
- break;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- if ( copy_to_user(argp, &value, sizeof(int)) )
- return -EFAULT;
- break;
- case WDIOC_GETSUPPORT:
- if ( copy_to_user(argp, &ident, sizeof(ident)) )
- return -EFAULT;
- break;
- case WDIOC_SETOPTIONS:
- if ( copy_from_user(&value, argp, sizeof(int)) )
- return -EFAULT;
- switch(value) {
- case WDIOS_ENABLECARD:
- mtx1_wdt_start();
- break;
- case WDIOS_DISABLECARD:
- return mtx1_wdt_stop();
- default:
- return -EINVAL;
- }
- break;
- default:
- return -ENOTTY;
+ switch (cmd) {
+ case WDIOC_KEEPALIVE:
+ mtx1_wdt_reset();
+ break;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ put_user(0, p);
+ break;
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ break;
+ case WDIOC_SETOPTIONS:
+ if (get_user(value, p))
+ return -EFAULT;
+ if (value & WDIOS_ENABLECARD)
+ mtx1_wdt_start();
+ else if (value & WDIOS_DISABLECARD)
+ mtx1_wdt_stop();
+ else
+ return -EINVAL;
+ return 0;
+ default:
+ return -ENOTTY;
}
return 0;
}
-static ssize_t mtx1_wdt_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
+static ssize_t mtx1_wdt_write(struct file *file, const char *buf,
+ size_t count, loff_t *ppos)
{
if (!count)
return -EIO;
-
mtx1_wdt_reset();
return count;
}
@@ -188,7 +188,7 @@ static ssize_t mtx1_wdt_write(struct file *file, const char *buf, size_t count,
static const struct file_operations mtx1_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
- .ioctl = mtx1_wdt_ioctl,
+ .unlocked_ioctl = mtx1_wdt_ioctl,
.open = mtx1_wdt_open,
.write = mtx1_wdt_write,
.release = mtx1_wdt_release
@@ -208,29 +208,26 @@ static int mtx1_wdt_probe(struct platform_device *pdev)
mtx1_wdt_device.gpio = pdev->resource[0].start;
- if ((ret = misc_register(&mtx1_wdt_misc)) < 0) {
- printk(KERN_ERR " mtx-1_wdt : failed to register\n");
- return ret;
- }
-
+ spin_lock_init(&mtx1_wdt_device.lock);
init_completion(&mtx1_wdt_device.stop);
mtx1_wdt_device.queue = 0;
-
clear_bit(0, &mtx1_wdt_device.inuse);
-
setup_timer(&mtx1_wdt_device.timer, mtx1_wdt_trigger, 0L);
-
mtx1_wdt_device.default_ticks = ticks;
+ ret = misc_register(&mtx1_wdt_misc);
+ if (ret < 0) {
+ printk(KERN_ERR " mtx-1_wdt : failed to register\n");
+ return ret;
+ }
mtx1_wdt_start();
-
printk(KERN_INFO "MTX-1 Watchdog driver\n");
-
return 0;
}
static int mtx1_wdt_remove(struct platform_device *pdev)
{
+ /* FIXME: do we need to lock this test ? */
if (mtx1_wdt_device.queue) {
mtx1_wdt_device.queue = 0;
wait_for_completion(&mtx1_wdt_device.stop);
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 29/57] mv64x60_wdt: clean up and locking checks
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (27 preceding siblings ...)
2008-05-19 13:07 ` [PATCH 28/57] mtx-1_wdt: clean up, coding style, unlocked ioctl Alan Cox
@ 2008-05-19 13:07 ` Alan Cox
2008-05-19 13:07 ` [PATCH 30/57] omap_wdt: locking, unlocked_ioctl, tidy Alan Cox
` (28 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:07 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/mv64x60_wdt.c | 20 +++++++++++---------
1 files changed, 11 insertions(+), 9 deletions(-)
diff --git a/drivers/watchdog/mv64x60_wdt.c b/drivers/watchdog/mv64x60_wdt.c
index b59ca32..ac09fe4 100644
--- a/drivers/watchdog/mv64x60_wdt.c
+++ b/drivers/watchdog/mv64x60_wdt.c
@@ -8,7 +8,7 @@
* and services the watchdog.
*
* Derived from mpc8xx_wdt.c, with the following copyright.
- *
+ *
* 2002 (c) Florian Schirmer <jolt@tuxbox.org> This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
@@ -24,8 +24,8 @@
#include <linux/platform_device.h>
#include <linux/mv643xx.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
#define MV64x60_WDT_WDC_OFFSET 0
@@ -61,7 +61,9 @@ static DEFINE_SPINLOCK(mv64x60_wdt_spinlock);
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
static int mv64x60_wdt_toggle_wdc(int enabled_predicate, int field_shift)
{
@@ -150,7 +152,7 @@ static int mv64x60_wdt_release(struct inode *inode, struct file *file)
}
static ssize_t mv64x60_wdt_write(struct file *file, const char __user *data,
- size_t len, loff_t * ppos)
+ size_t len, loff_t *ppos)
{
if (len) {
if (!nowayout) {
@@ -160,7 +162,7 @@ static ssize_t mv64x60_wdt_write(struct file *file, const char __user *data,
for (i = 0; i != len; i++) {
char c;
- if(get_user(c, data + i))
+ if (get_user(c, data + i))
return -EFAULT;
if (c == 'V')
expect_close = 42;
@@ -172,8 +174,8 @@ static ssize_t mv64x60_wdt_write(struct file *file, const char __user *data,
return len;
}
-static int mv64x60_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long mv64x60_wdt_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
{
int timeout;
int options;
@@ -240,7 +242,7 @@ static const struct file_operations mv64x60_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = mv64x60_wdt_write,
- .ioctl = mv64x60_wdt_ioctl,
+ .unlocked_ioctl = mv64x60_wdt_ioctl,
.open = mv64x60_wdt_open,
.release = mv64x60_wdt_release,
};
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 30/57] omap_wdt: locking, unlocked_ioctl, tidy
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (28 preceding siblings ...)
2008-05-19 13:07 ` [PATCH 29/57] mv64x60_wdt: clean up and locking checks Alan Cox
@ 2008-05-19 13:07 ` Alan Cox
2008-05-19 13:07 ` [PATCH 31/57] pc87413_wdt: clean up, coding style, unlocked_ioctl Alan Cox
` (27 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:07 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/omap_wdt.c | 35 +++++++++++++++++++++--------------
1 files changed, 21 insertions(+), 14 deletions(-)
diff --git a/drivers/watchdog/omap_wdt.c b/drivers/watchdog/omap_wdt.c
index 74bc39a..ccdf069 100644
--- a/drivers/watchdog/omap_wdt.c
+++ b/drivers/watchdog/omap_wdt.c
@@ -41,9 +41,9 @@
#include <linux/clk.h>
#include <linux/bitops.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/hardware.h>
+#include </io.h>
+#include <linux/uaccess.h>
+#include <linux/hardware.h>
#include <asm/arch/prcm.h>
@@ -54,11 +54,12 @@ module_param(timer_margin, uint, 0);
MODULE_PARM_DESC(timer_margin, "initial watchdog timeout (in seconds)");
static int omap_wdt_users;
-static struct clk *armwdt_ck = NULL;
-static struct clk *mpu_wdt_ick = NULL;
-static struct clk *mpu_wdt_fck = NULL;
+static struct clk *armwdt_ck;
+static struct clk *mpu_wdt_ick;
+static struct clk *mpu_wdt_fck;
static unsigned int wdt_trgr_pattern = 0x1234;
+static spinlock_t wdt_lock;
static void omap_wdt_ping(void)
{
@@ -174,22 +175,23 @@ static int omap_wdt_release(struct inode *inode, struct file *file)
return 0;
}
-static ssize_t
-omap_wdt_write(struct file *file, const char __user *data,
+static ssize_t omap_wdt_write(struct file *file, const char __user *data,
size_t len, loff_t *ppos)
{
/* Refresh LOAD_TIME. */
- if (len)
+ if (len) {
+ spin_lock(&wdt_lock);
omap_wdt_ping();
+ spin_unlock(&wdt_lock);
+ }
return len;
}
-static int
-omap_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long omap_wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int new_margin;
- static struct watchdog_info ident = {
+ static const struct watchdog_info ident = {
.identity = "OMAP Watchdog",
.options = WDIOF_SETTIMEOUT,
.firmware_version = 0,
@@ -211,18 +213,22 @@ omap_wdt_ioctl(struct inode *inode, struct file *file,
return put_user(omap_prcm_get_reset_sources(),
(int __user *)arg);
case WDIOC_KEEPALIVE:
+ spin_lock(&wdt_lock);
omap_wdt_ping();
+ spin_unlock(&wdt_lock);
return 0;
case WDIOC_SETTIMEOUT:
if (get_user(new_margin, (int __user *)arg))
return -EFAULT;
omap_wdt_adjust_timeout(new_margin);
+ spin_lock(&wdt_lock);
omap_wdt_disable();
omap_wdt_set_timeout();
omap_wdt_enable();
omap_wdt_ping();
+ spin_unlock(&wdt_lock);
/* Fall */
case WDIOC_GETTIMEOUT:
return put_user(timer_margin, (int __user *)arg);
@@ -232,7 +238,7 @@ omap_wdt_ioctl(struct inode *inode, struct file *file,
static const struct file_operations omap_wdt_fops = {
.owner = THIS_MODULE,
.write = omap_wdt_write,
- .ioctl = omap_wdt_ioctl,
+ .unlocked_ioctl = omap_wdt_ioctl,
.open = omap_wdt_open,
.release = omap_wdt_release,
};
@@ -373,6 +379,7 @@ static struct platform_driver omap_wdt_driver = {
static int __init omap_wdt_init(void)
{
+ spin_lock_init(&wdt_lock);
return platform_driver_register(&omap_wdt_driver);
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 31/57] pc87413_wdt: clean up, coding style, unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (29 preceding siblings ...)
2008-05-19 13:07 ` [PATCH 30/57] omap_wdt: locking, unlocked_ioctl, tidy Alan Cox
@ 2008-05-19 13:07 ` Alan Cox
2008-05-19 13:07 ` [PATCH 32/57] pcwd: clean up, unlocked_ioctl usage Alan Cox
` (26 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:07 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/pc87413_wdt.c | 211 ++++++++++++++++------------------------
1 files changed, 87 insertions(+), 124 deletions(-)
diff --git a/drivers/watchdog/pc87413_wdt.c b/drivers/watchdog/pc87413_wdt.c
index 15e4f88..326f2d2 100644
--- a/drivers/watchdog/pc87413_wdt.c
+++ b/drivers/watchdog/pc87413_wdt.c
@@ -31,9 +31,9 @@
#include <linux/spinlock.h>
#include <linux/moduleparam.h>
#include <linux/version.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
/* #define DEBUG 1 */
@@ -56,12 +56,12 @@
static int io = 0x2E; /* Address used on Portwell Boards */
-static int timeout = DEFAULT_TIMEOUT; /* timeout value */
-static unsigned long timer_enabled = 0; /* is the timer enabled? */
+static int timeout = DEFAULT_TIMEOUT; /* timeout value */
+static unsigned long timer_enabled; /* is the timer enabled? */
-static char expect_close; /* is the close expected? */
+static char expect_close; /* is the close expected? */
-static DEFINE_SPINLOCK(io_lock);/* to guard the watchdog from io races */
+static DEFINE_SPINLOCK(io_lock); /* to guard us from io races */
static int nowayout = WATCHDOG_NOWAYOUT;
@@ -69,7 +69,7 @@ static int nowayout = WATCHDOG_NOWAYOUT;
/* Select pins for Watchdog output */
-static inline void pc87413_select_wdt_out (void)
+static inline void pc87413_select_wdt_out(void)
{
unsigned int cr_data = 0;
@@ -77,7 +77,7 @@ static inline void pc87413_select_wdt_out (void)
outb_p(SIOCFG2, WDT_INDEX_IO_PORT);
- cr_data = inb (WDT_DATA_IO_PORT);
+ cr_data = inb(WDT_DATA_IO_PORT);
cr_data |= 0x80; /* Set Bit7 to 1*/
outb_p(SIOCFG2, WDT_INDEX_IO_PORT);
@@ -85,8 +85,9 @@ static inline void pc87413_select_wdt_out (void)
outb_p(cr_data, WDT_DATA_IO_PORT);
#ifdef DEBUG
- printk(KERN_INFO DPFX "Select multiple pin,pin55,as WDT output:"
- " Bit7 to 1: %d\n", cr_data);
+ printk(KERN_INFO DPFX
+ "Select multiple pin,pin55,as WDT output: Bit7 to 1: %d\n",
+ cr_data);
#endif
}
@@ -94,7 +95,7 @@ static inline void pc87413_select_wdt_out (void)
static inline void pc87413_enable_swc(void)
{
- unsigned int cr_data=0;
+ unsigned int cr_data = 0;
/* Step 2: Enable SWC functions */
@@ -129,12 +130,11 @@ static inline unsigned int pc87413_get_swc_base(void)
addr_l = inb(WDT_DATA_IO_PORT);
swc_base_addr = (addr_h << 8) + addr_l;
-
#ifdef DEBUG
- printk(KERN_INFO DPFX "Read SWC I/O Base Address: low %d, high %d,"
- " res %d\n", addr_l, addr_h, swc_base_addr);
+ printk(KERN_INFO DPFX
+ "Read SWC I/O Base Address: low %d, high %d, res %d\n",
+ addr_l, addr_h, swc_base_addr);
#endif
-
return swc_base_addr;
}
@@ -143,9 +143,7 @@ static inline unsigned int pc87413_get_swc_base(void)
static inline void pc87413_swc_bank3(unsigned int swc_base_addr)
{
/* Step 4: Select Bank3 of SWC */
-
outb_p(inb(swc_base_addr + 0x0f) | 0x03, swc_base_addr + 0x0f);
-
#ifdef DEBUG
printk(KERN_INFO DPFX "Select Bank3 of SWC\n");
#endif
@@ -157,9 +155,7 @@ static inline void pc87413_programm_wdto(unsigned int swc_base_addr,
char pc87413_time)
{
/* Step 5: Programm WDTO, Twd. */
-
outb_p(pc87413_time, swc_base_addr + WDTO);
-
#ifdef DEBUG
printk(KERN_INFO DPFX "Set WDTO to %d minutes\n", pc87413_time);
#endif
@@ -170,9 +166,7 @@ static inline void pc87413_programm_wdto(unsigned int swc_base_addr,
static inline void pc87413_enable_wden(unsigned int swc_base_addr)
{
/* Step 6: Enable WDEN */
-
- outb_p(inb (swc_base_addr + WDCTL) | 0x01, swc_base_addr + WDCTL);
-
+ outb_p(inb(swc_base_addr + WDCTL) | 0x01, swc_base_addr + WDCTL);
#ifdef DEBUG
printk(KERN_INFO DPFX "Enable WDEN\n");
#endif
@@ -182,9 +176,7 @@ static inline void pc87413_enable_wden(unsigned int swc_base_addr)
static inline void pc87413_enable_sw_wd_tren(unsigned int swc_base_addr)
{
/* Enable SW_WD_TREN */
-
- outb_p(inb (swc_base_addr + WDCFG) | 0x80, swc_base_addr + WDCFG);
-
+ outb_p(inb(swc_base_addr + WDCFG) | 0x80, swc_base_addr + WDCFG);
#ifdef DEBUG
printk(KERN_INFO DPFX "Enable SW_WD_TREN\n");
#endif
@@ -195,9 +187,7 @@ static inline void pc87413_enable_sw_wd_tren(unsigned int swc_base_addr)
static inline void pc87413_disable_sw_wd_tren(unsigned int swc_base_addr)
{
/* Disable SW_WD_TREN */
-
- outb_p(inb (swc_base_addr + WDCFG) & 0x7f, swc_base_addr + WDCFG);
-
+ outb_p(inb(swc_base_addr + WDCFG) & 0x7f, swc_base_addr + WDCFG);
#ifdef DEBUG
printk(KERN_INFO DPFX "pc87413 - Disable SW_WD_TREN\n");
#endif
@@ -208,9 +198,7 @@ static inline void pc87413_disable_sw_wd_tren(unsigned int swc_base_addr)
static inline void pc87413_enable_sw_wd_trg(unsigned int swc_base_addr)
{
/* Enable SW_WD_TRG */
-
- outb_p(inb (swc_base_addr + WDCTL) | 0x80, swc_base_addr + WDCTL);
-
+ outb_p(inb(swc_base_addr + WDCTL) | 0x80, swc_base_addr + WDCTL);
#ifdef DEBUG
printk(KERN_INFO DPFX "pc87413 - Enable SW_WD_TRG\n");
#endif
@@ -221,9 +209,7 @@ static inline void pc87413_enable_sw_wd_trg(unsigned int swc_base_addr)
static inline void pc87413_disable_sw_wd_trg(unsigned int swc_base_addr)
{
/* Disable SW_WD_TRG */
-
- outb_p(inb (swc_base_addr + WDCTL) & 0x7f, swc_base_addr + WDCTL);
-
+ outb_p(inb(swc_base_addr + WDCTL) & 0x7f, swc_base_addr + WDCTL);
#ifdef DEBUG
printk(KERN_INFO DPFX "Disable SW_WD_TRG\n");
#endif
@@ -314,8 +300,8 @@ static int pc87413_open(struct inode *inode, struct file *file)
/* Reload and activate timer */
pc87413_refresh();
- printk(KERN_INFO MODNAME "Watchdog enabled. Timeout set to"
- " %d minute(s).\n", timeout);
+ printk(KERN_INFO MODNAME
+ "Watchdog enabled. Timeout set to %d minute(s).\n", timeout);
return nonseekable_open(inode, file);
}
@@ -338,17 +324,15 @@ static int pc87413_release(struct inode *inode, struct file *file)
if (expect_close == 42) {
pc87413_disable();
- printk(KERN_INFO MODNAME "Watchdog disabled,"
- " sleeping again...\n");
+ printk(KERN_INFO MODNAME
+ "Watchdog disabled, sleeping again...\n");
} else {
- printk(KERN_CRIT MODNAME "Unexpected close, not stopping"
- " watchdog!\n");
+ printk(KERN_CRIT MODNAME
+ "Unexpected close, not stopping watchdog!\n");
pc87413_refresh();
}
-
clear_bit(0, &timer_enabled);
expect_close = 0;
-
return 0;
}
@@ -386,7 +370,8 @@ static ssize_t pc87413_write(struct file *file, const char __user *data,
/* reset expect flag */
expect_close = 0;
- /* scan to see whether or not we got the magic character */
+ /* scan to see whether or not we got the
+ magic character */
for (i = 0; i != len; i++) {
char c;
if (get_user(c, data+i))
@@ -404,7 +389,6 @@ static ssize_t pc87413_write(struct file *file, const char __user *data,
/**
* pc87413_ioctl:
- * @inode: inode of the device
* @file: file handle to the device
* @cmd: watchdog command
* @arg: argument pointer
@@ -414,8 +398,8 @@ static ssize_t pc87413_write(struct file *file, const char __user *data,
* querying capabilities and current status.
*/
-static int pc87413_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long pc87413_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int new_timeout;
@@ -426,75 +410,58 @@ static int pc87413_ioctl(struct inode *inode, struct file *file,
static struct watchdog_info ident = {
.options = WDIOF_KEEPALIVEPING |
- WDIOF_SETTIMEOUT |
- WDIOF_MAGICCLOSE,
+ WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE,
.firmware_version = 1,
.identity = "PC87413(HF/F) watchdog"
};
uarg.i = (int __user *)arg;
- switch(cmd) {
- default:
- return -ENOTTY;
-
- case WDIOC_GETSUPPORT:
- return copy_to_user(uarg.ident, &ident,
- sizeof(ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- return put_user(pc87413_status(), uarg.i);
-
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, uarg.i);
-
- case WDIOC_KEEPALIVE:
- pc87413_refresh();
+ switch (cmd) {
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(uarg.ident, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ return put_user(pc87413_status(), uarg.i);
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, uarg.i);
+ case WDIOC_KEEPALIVE:
+ pc87413_refresh();
#ifdef DEBUG
- printk(KERN_INFO DPFX "keepalive\n");
+ printk(KERN_INFO DPFX "keepalive\n");
#endif
- return 0;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, uarg.i))
- return -EFAULT;
-
- // the API states this is given in secs
- new_timeout /= 60;
-
- if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
- return -EINVAL;
-
- timeout = new_timeout;
- pc87413_refresh();
-
- // fall through and return the new timeout...
-
- case WDIOC_GETTIMEOUT:
-
- new_timeout = timeout * 60;
-
- return put_user(new_timeout, uarg.i);
-
- case WDIOC_SETOPTIONS:
- {
- int options, retval = -EINVAL;
-
- if (get_user(options, uarg.i))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- pc87413_disable();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- pc87413_enable();
- retval = 0;
- }
-
- return retval;
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, uarg.i))
+ return -EFAULT;
+ /* the API states this is given in secs */
+ new_timeout /= 60;
+ if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
+ return -EINVAL;
+ timeout = new_timeout;
+ pc87413_refresh();
+ /* fall through and return the new timeout... */
+ case WDIOC_GETTIMEOUT:
+ new_timeout = timeout * 60;
+ return put_user(new_timeout, uarg.i);
+ case WDIOC_SETOPTIONS:
+ {
+ int options, retval = -EINVAL;
+ if (get_user(options, uarg.i))
+ return -EFAULT;
+ if (options & WDIOS_DISABLECARD) {
+ pc87413_disable();
+ retval = 0;
}
+ if (options & WDIOS_ENABLECARD) {
+ pc87413_enable();
+ retval = 0;
+ }
+ return retval;
+ }
+ default:
+ return -ENOTTY;
}
}
@@ -517,10 +484,8 @@ static int pc87413_notify_sys(struct notifier_block *this,
void *unused)
{
if (code == SYS_DOWN || code == SYS_HALT)
- {
/* Turn the card off */
pc87413_disable();
- }
return NOTIFY_DONE;
}
@@ -530,18 +495,16 @@ static const struct file_operations pc87413_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = pc87413_write,
- .ioctl = pc87413_ioctl,
+ .unlocked_ioctl = pc87413_ioctl,
.open = pc87413_open,
.release = pc87413_release,
};
-static struct notifier_block pc87413_notifier =
-{
+static struct notifier_block pc87413_notifier = {
.notifier_call = pc87413_notify_sys,
};
-static struct miscdevice pc87413_miscdev=
-{
+static struct miscdevice pc87413_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &pc87413_fops
@@ -561,29 +524,26 @@ static int __init pc87413_init(void)
{
int ret;
- printk(KERN_INFO PFX "Version " VERSION " at io 0x%X\n", WDT_INDEX_IO_PORT);
+ printk(KERN_INFO PFX "Version " VERSION " at io 0x%X\n",
+ WDT_INDEX_IO_PORT);
/* request_region(io, 2, "pc87413"); */
ret = register_reboot_notifier(&pc87413_notifier);
if (ret != 0) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", ret);
}
ret = misc_register(&pc87413_miscdev);
-
if (ret != 0) {
printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
WATCHDOG_MINOR, ret);
unregister_reboot_notifier(&pc87413_notifier);
return ret;
}
-
printk(KERN_INFO PFX "initialized. timeout=%d min \n", timeout);
-
pc87413_enable();
-
return 0;
}
@@ -600,8 +560,7 @@ static int __init pc87413_init(void)
static void __exit pc87413_exit(void)
{
/* Stop the timer before we leave */
- if (!nowayout)
- {
+ if (!nowayout) {
pc87413_disable();
printk(KERN_INFO MODNAME "Watchdog disabled.\n");
}
@@ -626,8 +585,12 @@ module_param(io, int, 0);
MODULE_PARM_DESC(io, MODNAME " I/O port (default: " __MODULE_STRING(io) ").");
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in minutes (default=" __MODULE_STRING(timeout) ").");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in minutes (default="
+ __MODULE_STRING(timeout) ").");
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 32/57] pcwd: clean up, unlocked_ioctl usage
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (30 preceding siblings ...)
2008-05-19 13:07 ` [PATCH 31/57] pc87413_wdt: clean up, coding style, unlocked_ioctl Alan Cox
@ 2008-05-19 13:07 ` Alan Cox
2008-05-19 13:07 ` [PATCH 33/57] pnx4008_wdt: unlocked_ioctl setup Alan Cox
` (25 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:07 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/pcwd.c | 179 ++++++++++++++++++++++++++---------------------
1 files changed, 100 insertions(+), 79 deletions(-)
diff --git a/drivers/watchdog/pcwd.c b/drivers/watchdog/pcwd.c
index 7b41434..e1259ad 100644
--- a/drivers/watchdog/pcwd.c
+++ b/drivers/watchdog/pcwd.c
@@ -40,13 +40,15 @@
* fairly useless proc entry.
* 990610 removed said useless proc code for the merge <alan>
* 000403 Removed last traces of proc code. <davej>
- * 011214 Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT <Matt_Domsch@dell.com>
+ * 011214 Added nowayout module option to override
+ * CONFIG_WATCHDOG_NOWAYOUT <Matt_Domsch@dell.com>
* Added timeout module option to override default
*/
/*
* A bells and whistles driver is available from http://www.pcwd.de/
- * More info available at http://www.berkprod.com/ or http://www.pcwatchdog.com/
+ * More info available at http://www.berkprod.com/ or
+ * http://www.pcwatchdog.com/
*/
#include <linux/module.h> /* For module specific items */
@@ -65,9 +67,8 @@
#include <linux/isa.h> /* For isa devices */
#include <linux/ioport.h> /* For io-port access */
#include <linux/spinlock.h> /* For spin_lock/spin_unlock/... */
-
-#include <asm/uaccess.h> /* For copy_to_user/put_user/... */
-#include <asm/io.h> /* For inb/outb/... */
+#include <linux/uaccess.h> /* For copy_to_user/put_user/... */
+#include <linux/io.h> /* For inb/outb/... */
/* Module and version information */
#define WATCHDOG_VERSION "1.20"
@@ -111,14 +112,16 @@ static int pcwd_ioports[] = { 0x270, 0x350, 0x370, 0x000 };
#define WD_REVC_WTRP 0x01 /* Watchdog Trip status */
#define WD_REVC_HRBT 0x02 /* Watchdog Heartbeat */
#define WD_REVC_TTRP 0x04 /* Temperature Trip status */
-#define WD_REVC_RL2A 0x08 /* Relay 2 activated by on-board processor */
+#define WD_REVC_RL2A 0x08 /* Relay 2 activated by
+ on-board processor */
#define WD_REVC_RL1A 0x10 /* Relay 1 active */
#define WD_REVC_R2DS 0x40 /* Relay 2 disable */
#define WD_REVC_RLY2 0x80 /* Relay 2 activated? */
/* Port 2 : Control Status #2 */
#define WD_WDIS 0x10 /* Watchdog Disabled */
#define WD_ENTP 0x20 /* Watchdog Enable Temperature Trip */
-#define WD_SSEL 0x40 /* Watchdog Switch Select (1:SW1 <-> 0:SW2) */
+#define WD_SSEL 0x40 /* Watchdog Switch Select
+ (1:SW1 <-> 0:SW2) */
#define WD_WCMD 0x80 /* Watchdog Command Mode */
/* max. time we give an ISA watchdog card to process a command */
@@ -168,11 +171,15 @@ static int cards_found;
static atomic_t open_allowed = ATOMIC_INIT(1);
static char expect_close;
static int temp_panic;
-static struct { /* this is private data for each ISA-PC watchdog card */
+
+/* this is private data for each ISA-PC watchdog card */
+static struct {
char fw_ver_str[6]; /* The cards firmware version */
int revision; /* The card's revision */
- int supports_temp; /* Wether or not the card has a temperature device */
- int command_mode; /* Wether or not the card is in command mode */
+ int supports_temp; /* Whether or not the card has
+ a temperature device */
+ int command_mode; /* Whether or not the card is in
+ command mode */
int boot_status; /* The card's boot status */
int io_addr; /* The cards I/O address */
spinlock_t io_lock; /* the lock for io operations */
@@ -186,16 +193,20 @@ static struct { /* this is private data for each ISA-PC watchdog card */
#define DEBUG 2 /* print fancy stuff too */
static int debug = QUIET;
module_param(debug, int, 0);
-MODULE_PARM_DESC(debug, "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)");
+MODULE_PARM_DESC(debug,
+ "Debug level: 0=Quiet, 1=Verbose, 2=Debug (default=0)");
-#define WATCHDOG_HEARTBEAT 0 /* default heartbeat = delay-time from dip-switches */
+/* default heartbeat = delay-time from dip-switches */
+#define WATCHDOG_HEARTBEAT 0
static int heartbeat = WATCHDOG_HEARTBEAT;
module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (2<=heartbeat<=7200 or 0=delay-time from dip-switches, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
+MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (2 <= heartbeat <= 7200 or 0=delay-time from dip-switches, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* Internal functions
@@ -224,7 +235,7 @@ static int send_isa_command(int cmd)
if (port0 == last_port0)
break; /* Data is stable */
- udelay (250);
+ udelay(250);
}
if (debug >= DEBUG)
@@ -236,7 +247,7 @@ static int send_isa_command(int cmd)
static int set_command_mode(void)
{
- int i, found=0, count=0;
+ int i, found = 0, count = 0;
/* Set the card into command mode */
spin_lock(&pcwd_private.io_lock);
@@ -296,7 +307,8 @@ static inline void pcwd_get_firmware(void)
ten = send_isa_command(CMD_ISA_VERSION_TENTH);
hund = send_isa_command(CMD_ISA_VERSION_HUNDRETH);
minor = send_isa_command(CMD_ISA_VERSION_MINOR);
- sprintf(pcwd_private.fw_ver_str, "%c.%c%c%c", one, ten, hund, minor);
+ sprintf(pcwd_private.fw_ver_str, "%c.%c%c%c",
+ one, ten, hund, minor);
}
unset_command_mode();
@@ -305,7 +317,7 @@ static inline void pcwd_get_firmware(void)
static inline int pcwd_get_option_switches(void)
{
- int option_switches=0;
+ int option_switches = 0;
if (set_command_mode()) {
/* Get switch settings */
@@ -322,7 +334,9 @@ static void pcwd_show_card_info(void)
/* Get some extra info from the hardware (in command/debug/diag mode) */
if (pcwd_private.revision == PCWD_REVISION_A)
- printk(KERN_INFO PFX "ISA-PC Watchdog (REV.A) detected at port 0x%04x\n", pcwd_private.io_addr);
+ printk(KERN_INFO PFX
+ "ISA-PC Watchdog (REV.A) detected at port 0x%04x\n",
+ pcwd_private.io_addr);
else if (pcwd_private.revision == PCWD_REVISION_C) {
pcwd_get_firmware();
printk(KERN_INFO PFX "ISA-PC Watchdog (REV.C) detected at port 0x%04x (Firmware version: %s)\n",
@@ -347,12 +361,15 @@ static void pcwd_show_card_info(void)
printk(KERN_INFO PFX "Previous reboot was caused by the card\n");
if (pcwd_private.boot_status & WDIOF_OVERHEAT) {
- printk(KERN_EMERG PFX "Card senses a CPU Overheat. Panicking!\n");
- printk(KERN_EMERG PFX "CPU Overheat\n");
+ printk(KERN_EMERG PFX
+ "Card senses a CPU Overheat. Panicking!\n");
+ printk(KERN_EMERG PFX
+ "CPU Overheat\n");
}
if (pcwd_private.boot_status == 0)
- printk(KERN_INFO PFX "No previous trip detected - Cold boot or reset\n");
+ printk(KERN_INFO PFX
+ "No previous trip detected - Cold boot or reset\n");
}
static void pcwd_timer_ping(unsigned long data)
@@ -361,11 +378,12 @@ static void pcwd_timer_ping(unsigned long data)
/* If we got a heartbeat pulse within the WDT_INTERVAL
* we agree to ping the WDT */
- if(time_before(jiffies, pcwd_private.next_heartbeat)) {
+ if (time_before(jiffies, pcwd_private.next_heartbeat)) {
/* Ping the watchdog */
spin_lock(&pcwd_private.io_lock);
if (pcwd_private.revision == PCWD_REVISION_A) {
- /* Rev A cards are reset by setting the WD_WDRST bit in register 1 */
+ /* Rev A cards are reset by setting the
+ WD_WDRST bit in register 1 */
wdrst_stat = inb_p(pcwd_private.io_addr);
wdrst_stat &= 0x0F;
wdrst_stat |= WD_WDRST;
@@ -381,7 +399,8 @@ static void pcwd_timer_ping(unsigned long data)
spin_unlock(&pcwd_private.io_lock);
} else {
- printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
+ printk(KERN_WARNING PFX
+ "Heartbeat lost! Will not ping the watchdog\n");
}
}
@@ -454,7 +473,7 @@ static int pcwd_keepalive(void)
static int pcwd_set_heartbeat(int t)
{
- if ((t < 2) || (t > 7200)) /* arbitrary upper limit */
+ if (t < 2 || t > 7200) /* arbitrary upper limit */
return -EINVAL;
heartbeat = t;
@@ -470,7 +489,7 @@ static int pcwd_get_status(int *status)
{
int control_status;
- *status=0;
+ *status = 0;
spin_lock(&pcwd_private.io_lock);
if (pcwd_private.revision == PCWD_REVISION_A)
/* Rev A cards return status information from
@@ -494,9 +513,9 @@ static int pcwd_get_status(int *status)
if (control_status & WD_T110) {
*status |= WDIOF_OVERHEAT;
if (temp_panic) {
- printk(KERN_INFO PFX "Temperature overheat trip!\n");
+ printk(KERN_INFO PFX
+ "Temperature overheat trip!\n");
kernel_power_off();
- /* or should we just do a: panic(PFX "Temperature overheat trip!\n"); */
}
}
} else {
@@ -506,9 +525,9 @@ static int pcwd_get_status(int *status)
if (control_status & WD_REVC_TTRP) {
*status |= WDIOF_OVERHEAT;
if (temp_panic) {
- printk(KERN_INFO PFX "Temperature overheat trip!\n");
+ printk(KERN_INFO PFX
+ "Temperature overheat trip!\n");
kernel_power_off();
- /* or should we just do a: panic(PFX "Temperature overheat trip!\n"); */
}
}
}
@@ -524,18 +543,21 @@ static int pcwd_clear_status(void)
spin_lock(&pcwd_private.io_lock);
if (debug >= VERBOSE)
- printk(KERN_INFO PFX "clearing watchdog trip status\n");
+ printk(KERN_INFO PFX
+ "clearing watchdog trip status\n");
control_status = inb_p(pcwd_private.io_addr + 1);
if (debug >= DEBUG) {
- printk(KERN_DEBUG PFX "status was: 0x%02x\n", control_status);
+ printk(KERN_DEBUG PFX "status was: 0x%02x\n",
+ control_status);
printk(KERN_DEBUG PFX "sending: 0x%02x\n",
(control_status & WD_REVC_R2DS));
}
/* clear reset status & Keep Relay 2 disable state as it is */
- outb_p((control_status & WD_REVC_R2DS), pcwd_private.io_addr + 1);
+ outb_p((control_status & WD_REVC_R2DS),
+ pcwd_private.io_addr + 1);
spin_unlock(&pcwd_private.io_lock);
}
@@ -572,8 +594,7 @@ static int pcwd_get_temperature(int *temperature)
* /dev/watchdog handling
*/
-static int pcwd_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long pcwd_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
int rv;
int status;
@@ -590,12 +611,12 @@ static int pcwd_ioctl(struct inode *inode, struct file *file,
.identity = "PCWD",
};
- switch(cmd) {
+ switch (cmd) {
default:
return -ENOTTY;
case WDIOC_GETSUPPORT:
- if(copy_to_user(argp, &ident, sizeof(ident)))
+ if (copy_to_user(argp, &ident, sizeof(ident)))
return -EFAULT;
return 0;
@@ -613,25 +634,22 @@ static int pcwd_ioctl(struct inode *inode, struct file *file,
return put_user(temperature, argp);
case WDIOC_SETOPTIONS:
- if (pcwd_private.revision == PCWD_REVISION_C)
- {
- if(copy_from_user(&rv, argp, sizeof(int)))
+ if (pcwd_private.revision == PCWD_REVISION_C) {
+ if (get_user(rv, argp))
return -EFAULT;
- if (rv & WDIOS_DISABLECARD)
- {
- return pcwd_stop();
+ if (rv & WDIOS_DISABLECARD) {
+ status = pcwd_stop();
+ if (status < 0)
+ return status;
}
-
- if (rv & WDIOS_ENABLECARD)
- {
- return pcwd_start();
+ if (rv & WDIOS_ENABLECARD) {
+ status = pcwd_start();
+ if (status < 0)
+ return status;
}
-
if (rv & WDIOS_TEMPPANIC)
- {
temp_panic = 1;
- }
}
return -EINVAL;
@@ -682,16 +700,10 @@ static ssize_t pcwd_write(struct file *file, const char __user *buf, size_t len,
static int pcwd_open(struct inode *inode, struct file *file)
{
- if (!atomic_dec_and_test(&open_allowed) ) {
- if (debug >= VERBOSE)
- printk(KERN_ERR PFX "Attempt to open already opened device.\n");
- atomic_inc( &open_allowed );
+ if (test_and_set_bit(0, &open_allowed))
return -EBUSY;
- }
-
if (nowayout)
__module_get(THIS_MODULE);
-
/* Activate */
pcwd_start();
pcwd_keepalive();
@@ -700,14 +712,15 @@ static int pcwd_open(struct inode *inode, struct file *file)
static int pcwd_close(struct inode *inode, struct file *file)
{
- if (expect_close == 42) {
+ if (expect_close == 42)
pcwd_stop();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ else {
+ printk(KERN_CRIT PFX
+ "Unexpected close, not stopping watchdog!\n");
pcwd_keepalive();
}
expect_close = 0;
- atomic_inc( &open_allowed );
+ clear_bit(0, &open_allowed);
return 0;
}
@@ -750,7 +763,7 @@ static const struct file_operations pcwd_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = pcwd_write,
- .ioctl = pcwd_ioctl,
+ .unlocked_ioctl = pcwd_ioctl,
.open = pcwd_open,
.release = pcwd_close,
};
@@ -788,7 +801,7 @@ static inline int get_revision(void)
* presumes a floating bus reads as 0xff. */
if ((inb(pcwd_private.io_addr + 2) == 0xFF) ||
(inb(pcwd_private.io_addr + 3) == 0xFF))
- r=PCWD_REVISION_A;
+ r = PCWD_REVISION_A;
spin_unlock(&pcwd_private.io_lock);
return r;
@@ -803,7 +816,7 @@ static inline int get_revision(void)
*/
static int __devinit pcwd_isa_match(struct device *dev, unsigned int id)
{
- int base_addr=pcwd_ioports[id];
+ int base_addr = pcwd_ioports[id];
int port0, last_port0; /* Reg 0, in case it's REV A */
int port1, last_port1; /* Register 1 for REV C cards */
int i;
@@ -813,7 +826,7 @@ static int __devinit pcwd_isa_match(struct device *dev, unsigned int id)
printk(KERN_DEBUG PFX "pcwd_isa_match id=%d\n",
id);
- if (!request_region (base_addr, 4, "PCWD")) {
+ if (!request_region(base_addr, 4, "PCWD")) {
printk(KERN_INFO PFX "Port 0x%04x unavailable\n", base_addr);
return 0;
}
@@ -842,7 +855,7 @@ static int __devinit pcwd_isa_match(struct device *dev, unsigned int id)
}
}
}
- release_region (base_addr, 4);
+ release_region(base_addr, 4);
return retval;
}
@@ -857,7 +870,8 @@ static int __devinit pcwd_isa_probe(struct device *dev, unsigned int id)
cards_found++;
if (cards_found == 1)
- printk(KERN_INFO PFX "v%s Ken Hollis (kenji@bitgate.com)\n", WD_VER);
+ printk(KERN_INFO PFX "v%s Ken Hollis (kenji@bitgate.com)\n",
+ WD_VER);
if (cards_found > 1) {
printk(KERN_ERR PFX "This driver only supports 1 device\n");
@@ -875,10 +889,11 @@ static int __devinit pcwd_isa_probe(struct device *dev, unsigned int id)
/* Check card's revision */
pcwd_private.revision = get_revision();
- if (!request_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4, "PCWD")) {
+ if (!request_region(pcwd_private.io_addr,
+ (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4, "PCWD")) {
printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
pcwd_private.io_addr);
- ret=-EIO;
+ ret = -EIO;
goto error_request_region;
}
@@ -908,26 +923,30 @@ static int __devinit pcwd_isa_probe(struct device *dev, unsigned int id)
if (heartbeat == 0)
heartbeat = heartbeat_tbl[(pcwd_get_option_switches() & 0x07)];
- /* Check that the heartbeat value is within it's range ; if not reset to the default */
+ /* Check that the heartbeat value is within it's range;
+ if not reset to the default */
if (pcwd_set_heartbeat(heartbeat)) {
pcwd_set_heartbeat(WATCHDOG_HEARTBEAT);
- printk(KERN_INFO PFX "heartbeat value must be 2<=heartbeat<=7200, using %d\n",
- WATCHDOG_HEARTBEAT);
+ printk(KERN_INFO PFX
+ "heartbeat value must be 2 <= heartbeat <= 7200, using %d\n",
+ WATCHDOG_HEARTBEAT);
}
if (pcwd_private.supports_temp) {
ret = misc_register(&temp_miscdev);
if (ret) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- TEMP_MINOR, ret);
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ TEMP_MINOR, ret);
goto error_misc_register_temp;
}
}
ret = misc_register(&pcwd_miscdev);
if (ret) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
goto error_misc_register_watchdog;
}
@@ -940,7 +959,8 @@ error_misc_register_watchdog:
if (pcwd_private.supports_temp)
misc_deregister(&temp_miscdev);
error_misc_register_temp:
- release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4);
+ release_region(pcwd_private.io_addr,
+ (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4);
error_request_region:
pcwd_private.io_addr = 0x0000;
cards_found--;
@@ -964,7 +984,8 @@ static int __devexit pcwd_isa_remove(struct device *dev, unsigned int id)
misc_deregister(&pcwd_miscdev);
if (pcwd_private.supports_temp)
misc_deregister(&temp_miscdev);
- release_region(pcwd_private.io_addr, (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4);
+ release_region(pcwd_private.io_addr,
+ (pcwd_private.revision == PCWD_REVISION_A) ? 2 : 4);
pcwd_private.io_addr = 0x0000;
cards_found--;
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 33/57] pnx4008_wdt: unlocked_ioctl setup
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (31 preceding siblings ...)
2008-05-19 13:07 ` [PATCH 32/57] pcwd: clean up, unlocked_ioctl usage Alan Cox
@ 2008-05-19 13:07 ` Alan Cox
2008-05-19 13:07 ` [PATCH 34/57] rm9k_wdt: clean up Alan Cox
` (24 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:07 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/pnx4008_wdt.c | 18 ++++++++----------
1 files changed, 8 insertions(+), 10 deletions(-)
diff --git a/drivers/watchdog/pnx4008_wdt.c b/drivers/watchdog/pnx4008_wdt.c
index 6b8483d..8cd0d53 100644
--- a/drivers/watchdog/pnx4008_wdt.c
+++ b/drivers/watchdog/pnx4008_wdt.c
@@ -30,8 +30,8 @@
#include <linux/spinlock.h>
#include <asm/hardware.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
#define MODULE_NAME "PNX4008-WDT: "
@@ -144,9 +144,8 @@ static int pnx4008_wdt_open(struct inode *inode, struct file *file)
return nonseekable_open(inode, file);
}
-static ssize_t
-pnx4008_wdt_write(struct file *file, const char *data, size_t len,
- loff_t * ppos)
+static ssize_t pnx4008_wdt_write(struct file *file, const char *data,
+ size_t len, loff_t *ppos)
{
if (len) {
if (!nowayout) {
@@ -169,15 +168,14 @@ pnx4008_wdt_write(struct file *file, const char *data, size_t len,
return len;
}
-static struct watchdog_info ident = {
+static const struct watchdog_info ident = {
.options = WDIOF_CARDRESET | WDIOF_MAGICCLOSE |
WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
.identity = "PNX4008 Watchdog",
};
-static int
-pnx4008_wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long pnx4008_wdt_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
{
int ret = -ENOTTY;
int time;
@@ -238,7 +236,7 @@ static const struct file_operations pnx4008_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = pnx4008_wdt_write,
- .ioctl = pnx4008_wdt_ioctl,
+ .unlocked_ioctl = pnx4008_wdt_ioctl,
.open = pnx4008_wdt_open,
.release = pnx4008_wdt_release,
};
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 34/57] rm9k_wdt: clean up
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (32 preceding siblings ...)
2008-05-19 13:07 ` [PATCH 33/57] pnx4008_wdt: unlocked_ioctl setup Alan Cox
@ 2008-05-19 13:07 ` Alan Cox
2008-05-19 13:08 ` [PATCH 35/57] s3c2410: watchdog cleanup and switch to unlocked_ioctl Alan Cox
` (23 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:07 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/rm9k_wdt.c | 21 ++++++++++++---------
1 files changed, 12 insertions(+), 9 deletions(-)
diff --git a/drivers/watchdog/rm9k_wdt.c b/drivers/watchdog/rm9k_wdt.c
index 5c921e4..c172906 100644
--- a/drivers/watchdog/rm9k_wdt.c
+++ b/drivers/watchdog/rm9k_wdt.c
@@ -29,10 +29,10 @@
#include <linux/notifier.h>
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
-#include <asm/io.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
#include <asm/atomic.h>
#include <asm/processor.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
#include <asm/rm9k-ocd.h>
@@ -53,10 +53,12 @@ static void wdt_gpi_stop(void);
static void wdt_gpi_set_timeout(unsigned int);
static int wdt_gpi_open(struct inode *, struct file *);
static int wdt_gpi_release(struct inode *, struct file *);
-static ssize_t wdt_gpi_write(struct file *, const char __user *, size_t, loff_t *);
+static ssize_t wdt_gpi_write(struct file *, const char __user *, size_t,
+ loff_t *);
static long wdt_gpi_ioctl(struct file *, unsigned int, unsigned long);
static int wdt_gpi_notify(struct notifier_block *, unsigned long, void *);
-static const struct resource *wdt_gpi_get_resource(struct platform_device *, const char *, unsigned int);
+static const struct resource *wdt_gpi_get_resource(struct platform_device *,
+ const char *, unsigned int);
static int __init wdt_gpi_probe(struct device *);
static int __exit wdt_gpi_remove(struct device *);
@@ -68,7 +70,7 @@ static int locked;
/* These are set from device resources */
-static void __iomem * wd_regs;
+static void __iomem *wd_regs;
static unsigned int wd_irq, wd_ctr;
@@ -216,7 +218,8 @@ static int wdt_gpi_release(struct inode *inode, struct file *file)
if (expect_close) {
wdt_gpi_stop();
free_irq(wd_irq, &miscdev);
- printk(KERN_INFO "%s: watchdog stopped\n", wdt_gpi_name);
+ printk(KERN_INFO "%s: watchdog stopped\n",
+ wdt_gpi_name);
} else {
printk(KERN_CRIT "%s: unexpected close() -"
" watchdog left running\n",
@@ -241,8 +244,7 @@ wdt_gpi_write(struct file *f, const char __user *d, size_t s, loff_t *o)
return s ? 1 : 0;
}
-static long
-wdt_gpi_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
+static long wdt_gpi_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
{
long res = -ENOTTY;
const long size = _IOC_SIZE(cmd);
@@ -271,7 +273,8 @@ wdt_gpi_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
case WDIOC_GETSUPPORT:
wdinfo.options = nowayout ?
WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING :
- WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE;
+ WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING |
+ WDIOF_MAGICCLOSE;
res = __copy_to_user(argp, &wdinfo, size) ? -EFAULT : size;
break;
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 35/57] s3c2410: watchdog cleanup and switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (33 preceding siblings ...)
2008-05-19 13:07 ` [PATCH 34/57] rm9k_wdt: clean up Alan Cox
@ 2008-05-19 13:08 ` Alan Cox
2008-05-19 13:08 ` [PATCH 36/57] sa1100_wdt: Switch " Alan Cox
` (22 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:08 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/s3c2410_wdt.c | 148 ++++++++++++++++++++++------------------
1 files changed, 80 insertions(+), 68 deletions(-)
diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c
index 98532c0..97b4a2e 100644
--- a/drivers/watchdog/s3c2410_wdt.c
+++ b/drivers/watchdog/s3c2410_wdt.c
@@ -46,9 +46,8 @@
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/clk.h>
-
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
#include <asm/arch/map.h>
@@ -65,8 +64,8 @@
static int nowayout = WATCHDOG_NOWAYOUT;
static int tmr_margin = CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME;
static int tmr_atboot = CONFIG_S3C2410_WATCHDOG_ATBOOT;
-static int soft_noboot = 0;
-static int debug = 0;
+static int soft_noboot;
+static int debug;
module_param(tmr_margin, int, 0);
module_param(tmr_atboot, int, 0);
@@ -74,24 +73,23 @@ module_param(nowayout, int, 0);
module_param(soft_noboot, int, 0);
module_param(debug, int, 0);
-MODULE_PARM_DESC(tmr_margin, "Watchdog tmr_margin in seconds. default=" __MODULE_STRING(CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME) ")");
-
-MODULE_PARM_DESC(tmr_atboot, "Watchdog is started at boot time if set to 1, default=" __MODULE_STRING(CONFIG_S3C2410_WATCHDOG_ATBOOT));
-
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
-
+MODULE_PARM_DESC(tmr_margin, "Watchdog tmr_margin in seconds. default="
+ __MODULE_STRING(CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME) ")");
+MODULE_PARM_DESC(tmr_atboot,
+ "Watchdog is started at boot time if set to 1, default="
+ __MODULE_STRING(CONFIG_S3C2410_WATCHDOG_ATBOOT));
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
MODULE_PARM_DESC(soft_noboot, "Watchdog action, set to 1 to ignore reboots, 0 to reboot (default depends on ONLY_TESTING)");
-
MODULE_PARM_DESC(debug, "Watchdog debug, set to >1 for debug, (default 0)");
typedef enum close_state {
CLOSE_STATE_NOT,
- CLOSE_STATE_ALLOW=0x4021
+ CLOSE_STATE_ALLOW = 0x4021
} close_state_t;
-static DECLARE_MUTEX(open_lock);
-
+static unsigned long open_lock;
static struct device *wdt_dev; /* platform device attached to */
static struct resource *wdt_mem;
static struct resource *wdt_irq;
@@ -99,38 +97,58 @@ static struct clk *wdt_clock;
static void __iomem *wdt_base;
static unsigned int wdt_count;
static close_state_t allow_close;
+static DEFINE_SPINLOCK(wdt_lock);
/* watchdog control routines */
#define DBG(msg...) do { \
if (debug) \
printk(KERN_INFO msg); \
- } while(0)
+ } while (0)
/* functions */
-static int s3c2410wdt_keepalive(void)
+static void s3c2410wdt_keepalive(void)
{
+ spin_lock(&wdt_lock);
writel(wdt_count, wdt_base + S3C2410_WTCNT);
- return 0;
+ spin_unlock(&wdt_lock);
}
-static int s3c2410wdt_stop(void)
+static void __s3c2410wdt_stop(void)
{
unsigned long wtcon;
+ spin_lock(&wdt_lock);
wtcon = readl(wdt_base + S3C2410_WTCON);
wtcon &= ~(S3C2410_WTCON_ENABLE | S3C2410_WTCON_RSTEN);
writel(wtcon, wdt_base + S3C2410_WTCON);
+ spin_unlock(&wdt_lock);
+}
- return 0;
+static void __s3c2410wdt_stop(void)
+{
+ unsigned long wtcon;
+
+ wtcon = readl(wdt_base + S3C2410_WTCON);
+ wtcon &= ~(S3C2410_WTCON_ENABLE | S3C2410_WTCON_RSTEN);
+ writel(wtcon, wdt_base + S3C2410_WTCON);
+}
+
+static void s3c2410wdt_stop(void)
+{
+ spin_lock(&wdt_lock);
+ __s3c2410wdt_stop();
+ spin_unlock(&wdt_lock);
}
-static int s3c2410wdt_start(void)
+static void s3c2410wdt_start(void)
{
unsigned long wtcon;
- s3c2410wdt_stop();
+ spin_lock(&wdt_lock);
+
+ __s3c2410wdt_stop();
wtcon = readl(wdt_base + S3C2410_WTCON);
wtcon |= S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV128;
@@ -149,6 +167,7 @@ static int s3c2410wdt_start(void)
writel(wdt_count, wdt_base + S3C2410_WTDAT);
writel(wdt_count, wdt_base + S3C2410_WTCNT);
writel(wtcon, wdt_base + S3C2410_WTCON);
+ spin_unlock(&wdt_lock);
return 0;
}
@@ -211,7 +230,7 @@ static int s3c2410wdt_set_heartbeat(int timeout)
static int s3c2410wdt_open(struct inode *inode, struct file *file)
{
- if(down_trylock(&open_lock))
+ if (test_and_set_bit(0, &open_lock))
return -EBUSY;
if (nowayout)
@@ -231,15 +250,14 @@ static int s3c2410wdt_release(struct inode *inode, struct file *file)
* Lock it in if it's a module and we set nowayout
*/
- if (allow_close == CLOSE_STATE_ALLOW) {
+ if (allow_close == CLOSE_STATE_ALLOW)
s3c2410wdt_stop();
- } else {
+ else {
dev_err(wdt_dev, "Unexpected close, not stopping watchdog\n");
s3c2410wdt_keepalive();
}
-
allow_close = CLOSE_STATE_NOT;
- up(&open_lock);
+ clear_bit(0, &open_lock);
return 0;
}
@@ -249,7 +267,7 @@ static ssize_t s3c2410wdt_write(struct file *file, const char __user *data,
/*
* Refresh the timer.
*/
- if(len) {
+ if (len) {
if (!nowayout) {
size_t i;
@@ -265,7 +283,6 @@ static ssize_t s3c2410wdt_write(struct file *file, const char __user *data,
allow_close = CLOSE_STATE_ALLOW;
}
}
-
s3c2410wdt_keepalive();
}
return len;
@@ -273,48 +290,41 @@ static ssize_t s3c2410wdt_write(struct file *file, const char __user *data,
#define OPTIONS WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE
-static struct watchdog_info s3c2410_wdt_ident = {
+static const struct watchdog_info s3c2410_wdt_ident = {
.options = OPTIONS,
.firmware_version = 0,
.identity = "S3C2410 Watchdog",
};
-static int s3c2410wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long s3c2410wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
int new_margin;
switch (cmd) {
- default:
- return -ENOTTY;
-
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &s3c2410_wdt_ident,
- sizeof(s3c2410_wdt_ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
- case WDIOC_KEEPALIVE:
- s3c2410wdt_keepalive();
- return 0;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_margin, p))
- return -EFAULT;
-
- if (s3c2410wdt_set_heartbeat(new_margin))
- return -EINVAL;
-
- s3c2410wdt_keepalive();
- return put_user(tmr_margin, p);
-
- case WDIOC_GETTIMEOUT:
- return put_user(tmr_margin, p);
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &s3c2410_wdt_ident,
+ sizeof(s3c2410_wdt_ident)) ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ s3c2410wdt_keepalive();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_margin, p))
+ return -EFAULT;
+ if (s3c2410wdt_set_heartbeat(new_margin))
+ return -EINVAL;
+ s3c2410wdt_keepalive();
+ return put_user(tmr_margin, p);
+ case WDIOC_GETTIMEOUT:
+ return put_user(tmr_margin, p);
}
}
@@ -324,7 +334,7 @@ static const struct file_operations s3c2410wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = s3c2410wdt_write,
- .ioctl = s3c2410wdt_ioctl,
+ .unlocked_ioctl = s3c2410wdt_ioctl,
.open = s3c2410wdt_open,
.release = s3c2410wdt_release,
};
@@ -411,14 +421,15 @@ static int s3c2410wdt_probe(struct platform_device *pdev)
* not, try the default value */
if (s3c2410wdt_set_heartbeat(tmr_margin)) {
- started = s3c2410wdt_set_heartbeat(CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME);
+ started = s3c2410wdt_set_heartbeat(
+ CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME);
- if (started == 0) {
- dev_info(dev,"tmr_margin value out of range, default %d used\n",
+ if (started == 0)
+ dev_info(dev,
+ "tmr_margin value out of range, default %d used\n",
CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME);
- } else {
+ else
dev_info(dev, "default timer value is out of range, cannot start\n");
- }
}
ret = misc_register(&s3c2410wdt_miscdev);
@@ -447,7 +458,7 @@ static int s3c2410wdt_probe(struct platform_device *pdev)
(wtcon & S3C2410_WTCON_ENABLE) ? "" : "in",
(wtcon & S3C2410_WTCON_RSTEN) ? "" : "dis",
(wtcon & S3C2410_WTCON_INTEN) ? "" : "en");
-
+
return 0;
err_clk:
@@ -487,7 +498,7 @@ static int s3c2410wdt_remove(struct platform_device *dev)
static void s3c2410wdt_shutdown(struct platform_device *dev)
{
- s3c2410wdt_stop();
+ s3c2410wdt_stop();
}
#ifdef CONFIG_PM
@@ -540,7 +551,8 @@ static struct platform_driver s3c2410wdt_driver = {
};
-static char banner[] __initdata = KERN_INFO "S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics\n";
+static char banner[] __initdata =
+ KERN_INFO "S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics\n";
static int __init watchdog_init(void)
{
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 36/57] sa1100_wdt: Switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (34 preceding siblings ...)
2008-05-19 13:08 ` [PATCH 35/57] s3c2410: watchdog cleanup and switch to unlocked_ioctl Alan Cox
@ 2008-05-19 13:08 ` Alan Cox
2008-05-19 13:08 ` [PATCH 37/57] sbc60xxwdt: clean up and switch " Alan Cox
` (21 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:08 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/sa1100_wdt.c | 32 +++++++++++++++-----------------
1 files changed, 15 insertions(+), 17 deletions(-)
diff --git a/drivers/watchdog/sa1100_wdt.c b/drivers/watchdog/sa1100_wdt.c
index 34a2b3b..869d538 100644
--- a/drivers/watchdog/sa1100_wdt.c
+++ b/drivers/watchdog/sa1100_wdt.c
@@ -26,13 +26,13 @@
#include <linux/watchdog.h>
#include <linux/init.h>
#include <linux/bitops.h>
+#include <linux/uaccess.h>
#ifdef CONFIG_ARCH_PXA
#include <asm/arch/pxa-regs.h>
#endif
#include <asm/hardware.h>
-#include <asm/uaccess.h>
#define OSCR_FREQ CLOCK_TICK_RATE
@@ -45,7 +45,7 @@ static int boot_status;
*/
static int sa1100dog_open(struct inode *inode, struct file *file)
{
- if (test_and_set_bit(1,&sa1100wdt_users))
+ if (test_and_set_bit(1, &sa1100wdt_users))
return -EBUSY;
/* Activate SA1100 Watchdog timer */
@@ -66,28 +66,27 @@ static int sa1100dog_open(struct inode *inode, struct file *file)
static int sa1100dog_release(struct inode *inode, struct file *file)
{
printk(KERN_CRIT "WATCHDOG: Device closed - timer will not stop\n");
-
clear_bit(1, &sa1100wdt_users);
-
return 0;
}
-static ssize_t sa1100dog_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
+static ssize_t sa1100dog_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
{
if (len)
/* Refresh OSMR3 timer. */
OSMR3 = OSCR + pre_margin;
-
return len;
}
-static struct watchdog_info ident = {
- .options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+static const struct watchdog_info ident = {
+ .options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT
+ | WDIOF_KEEPALIVEPING,
.identity = "SA1100/PXA255 Watchdog",
};
-static int sa1100dog_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long sa1100dog_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int ret = -ENOTTY;
int time;
@@ -134,18 +133,16 @@ static int sa1100dog_ioctl(struct inode *inode, struct file *file,
return ret;
}
-static const struct file_operations sa1100dog_fops =
-{
+static const struct file_operations sa1100dog_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = sa1100dog_write,
- .ioctl = sa1100dog_ioctl,
+ .unlocked_ioctl = sa1100dog_ioctl,
.open = sa1100dog_open,
.release = sa1100dog_release,
};
-static struct miscdevice sa1100dog_miscdev =
-{
+static struct miscdevice sa1100dog_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &sa1100dog_fops,
@@ -167,8 +164,9 @@ static int __init sa1100dog_init(void)
ret = misc_register(&sa1100dog_miscdev);
if (ret == 0)
- printk("SA1100/PXA2xx Watchdog Timer: timer margin %d sec\n",
- margin);
+ printk(KERN_INFO
+ "SA1100/PXA2xx Watchdog Timer: timer margin %d sec\n",
+ margin);
return ret;
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 37/57] sbc60xxwdt: clean up and switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (35 preceding siblings ...)
2008-05-19 13:08 ` [PATCH 36/57] sa1100_wdt: Switch " Alan Cox
@ 2008-05-19 13:08 ` Alan Cox
2008-05-19 13:08 ` [PATCH 38/57] stg7240_wdt: unlocked_ioctl Alan Cox
` (20 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:08 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/sbc60xxwdt.c | 223 ++++++++++++++++++++---------------------
1 files changed, 110 insertions(+), 113 deletions(-)
diff --git a/drivers/watchdog/sbc60xxwdt.c b/drivers/watchdog/sbc60xxwdt.c
index ef76f01..e284a5d 100644
--- a/drivers/watchdog/sbc60xxwdt.c
+++ b/drivers/watchdog/sbc60xxwdt.c
@@ -16,19 +16,23 @@
*
* 12/4 - 2000 [Initial revision]
* 25/4 - 2000 Added /dev/watchdog support
- * 09/5 - 2001 [smj@oro.net] fixed fop_write to "return 1" on success
+ * 09/5 - 2001 [smj@oro.net] fixed fop_write to "return 1"
+ * on success
* 12/4 - 2002 [rob@osinvestor.com] eliminate fop_read
* fix possible wdt_is_open race
* add CONFIG_WATCHDOG_NOWAYOUT support
* remove lock_kernel/unlock_kernel pairs
* added KERN_* to printk's
* got rid of extraneous comments
- * changed watchdog_info to correctly reflect what the driver offers
- * added WDIOC_GETSTATUS, WDIOC_GETBOOTSTATUS, WDIOC_SETTIMEOUT,
- * WDIOC_GETTIMEOUT, and WDIOC_SETOPTIONS ioctls
+ * changed watchdog_info to correctly reflect what
+ * the driver offers
+ * added WDIOC_GETSTATUS, WDIOC_GETBOOTSTATUS,
+ * WDIOC_SETTIMEOUT, WDIOC_GETTIMEOUT, and
+ * WDIOC_SETOPTIONS ioctls
* 09/8 - 2003 [wim@iguana.be] cleanup of trailing spaces
* use module_param
- * made timeout (the emulated heartbeat) a module_param
+ * made timeout (the emulated heartbeat) a
+ * module_param
* made the keepalive ping an internal subroutine
* made wdt_stop and wdt_start module params
* added extra printk's for startup problems
@@ -56,9 +60,9 @@
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
#define OUR_NAME "sbc60xxwdt"
@@ -94,13 +98,18 @@ MODULE_PARM_DESC(wdt_start, "SBC60xx WDT 'start' io port (default 0x443)");
*/
#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */
-static int timeout = WATCHDOG_TIMEOUT; /* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
+static int timeout = WATCHDOG_TIMEOUT; /* in seconds, multiplied by HZ to
+ get seconds to wait for a ping */
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds. (1<=timeout<=3600, default="
+ __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
static void wdt_timer_ping(unsigned long);
static DEFINE_TIMER(timer, wdt_timer_ping, 0, 0);
@@ -117,15 +126,14 @@ static void wdt_timer_ping(unsigned long data)
/* If we got a heartbeat pulse within the WDT_US_INTERVAL
* we agree to ping the WDT
*/
- if(time_before(jiffies, next_heartbeat))
- {
+ if (time_before(jiffies, next_heartbeat)) {
/* Ping the WDT by reading from wdt_start */
inb_p(wdt_start);
/* Re-set the timer interval */
mod_timer(&timer, jiffies + WDT_INTERVAL);
- } else {
- printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
- }
+ } else
+ printk(KERN_WARNING PFX
+ "Heartbeat lost! Will not ping the watchdog\n");
}
/*
@@ -159,40 +167,40 @@ static void wdt_keepalive(void)
* /dev/watchdog handling
*/
-static ssize_t fop_write(struct file * file, const char __user * buf, size_t count, loff_t * ppos)
+static ssize_t fop_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
/* See if we got the magic character 'V' and reload the timer */
- if(count)
- {
- if (!nowayout)
- {
+ if (count) {
+ if (!nowayout) {
size_t ofs;
- /* note: just in case someone wrote the magic character
- * five months ago... */
+ /* note: just in case someone wrote the
+ magic character five months ago... */
wdt_expect_close = 0;
- /* scan to see whether or not we got the magic character */
- for(ofs = 0; ofs != count; ofs++)
- {
+ /* scan to see whether or not we got the
+ magic character */
+ for (ofs = 0; ofs != count; ofs++) {
char c;
- if(get_user(c, buf+ofs))
+ if (get_user(c, buf+ofs))
return -EFAULT;
- if(c == 'V')
+ if (c == 'V')
wdt_expect_close = 42;
}
}
- /* Well, anyhow someone wrote to us, we should return that favour */
+ /* Well, anyhow someone wrote to us, we should
+ return that favour */
wdt_keepalive();
}
return count;
}
-static int fop_open(struct inode * inode, struct file * file)
+static int fop_open(struct inode *inode, struct file *file)
{
/* Just in case we're already talking to someone... */
- if(test_and_set_bit(0, &wdt_is_open))
+ if (test_and_set_bit(0, &wdt_is_open))
return -EBUSY;
if (nowayout)
@@ -203,78 +211,72 @@ static int fop_open(struct inode * inode, struct file * file)
return nonseekable_open(inode, file);
}
-static int fop_close(struct inode * inode, struct file * file)
+static int fop_close(struct inode *inode, struct file *file)
{
- if(wdt_expect_close == 42)
+ if (wdt_expect_close == 42)
wdt_turnoff();
else {
del_timer(&timer);
- printk(KERN_CRIT PFX "device file closed unexpectedly. Will not stop the WDT!\n");
+ printk(KERN_CRIT PFX
+ "device file closed unexpectedly. Will not stop the WDT!\n");
}
clear_bit(0, &wdt_is_open);
wdt_expect_close = 0;
return 0;
}
-static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
- static struct watchdog_info ident=
- {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ static const struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE,
.firmware_version = 1,
.identity = "SBC60xx",
};
- switch(cmd)
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident))? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ wdt_keepalive();
+ return 0;
+ case WDIOC_SETOPTIONS:
{
- default:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- wdt_keepalive();
- return 0;
- case WDIOC_SETOPTIONS:
- {
- int new_options, retval = -EINVAL;
-
- if(get_user(new_options, p))
- return -EFAULT;
-
- if(new_options & WDIOS_DISABLECARD) {
- wdt_turnoff();
- retval = 0;
- }
-
- if(new_options & WDIOS_ENABLECARD) {
- wdt_startup();
- retval = 0;
- }
-
- return retval;
+ int new_options, retval = -EINVAL;
+ if (get_user(new_options, p))
+ return -EFAULT;
+ if (new_options & WDIOS_DISABLECARD) {
+ wdt_turnoff();
+ retval = 0;
}
- case WDIOC_SETTIMEOUT:
- {
- int new_timeout;
-
- if(get_user(new_timeout, p))
- return -EFAULT;
-
- if(new_timeout < 1 || new_timeout > 3600) /* arbitrary upper limit */
- return -EINVAL;
-
- timeout = new_timeout;
- wdt_keepalive();
- /* Fall through */
+ if (new_options & WDIOS_ENABLECARD) {
+ wdt_startup();
+ retval = 0;
}
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
+ return retval;
+ }
+ case WDIOC_SETTIMEOUT:
+ {
+ int new_timeout;
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+ /* arbitrary upper limit */
+ if (new_timeout < 1 || new_timeout > 3600)
+ return -EINVAL;
+
+ timeout = new_timeout;
+ wdt_keepalive();
+ /* Fall through */
+ }
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
}
}
@@ -284,7 +286,7 @@ static const struct file_operations wdt_fops = {
.write = fop_write,
.open = fop_open,
.release = fop_close,
- .ioctl = fop_ioctl,
+ .unlocked_ioctl = fop_ioctl,
};
static struct miscdevice wdt_miscdev = {
@@ -300,7 +302,7 @@ static struct miscdevice wdt_miscdev = {
static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
- if(code==SYS_DOWN || code==SYS_HALT)
+ if (code == SYS_DOWN || code == SYS_HALT)
wdt_turnoff();
return NOTIFY_DONE;
}
@@ -310,8 +312,7 @@ static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
* turn the timebomb registers off.
*/
-static struct notifier_block wdt_notifier=
-{
+static struct notifier_block wdt_notifier = {
.notifier_call = wdt_notify_sys,
};
@@ -324,23 +325,22 @@ static void __exit sbc60xxwdt_unload(void)
unregister_reboot_notifier(&wdt_notifier);
if ((wdt_stop != 0x45) && (wdt_stop != wdt_start))
- release_region(wdt_stop,1);
- release_region(wdt_start,1);
+ release_region(wdt_stop, 1);
+ release_region(wdt_start, 1);
}
static int __init sbc60xxwdt_init(void)
{
int rc = -EBUSY;
- if(timeout < 1 || timeout > 3600) /* arbitrary upper limit */
- {
+ if (timeout < 1 || timeout > 3600) { /* arbitrary upper limit */
timeout = WATCHDOG_TIMEOUT;
- printk(KERN_INFO PFX "timeout value must be 1<=x<=3600, using %d\n",
- timeout);
- }
+ printk(KERN_INFO PFX
+ "timeout value must be 1 <= x <= 3600, using %d\n",
+ timeout);
+ }
- if (!request_region(wdt_start, 1, "SBC 60XX WDT"))
- {
+ if (!request_region(wdt_start, 1, "SBC 60XX WDT")) {
printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
wdt_start);
rc = -EIO;
@@ -348,33 +348,30 @@ static int __init sbc60xxwdt_init(void)
}
/* We cannot reserve 0x45 - the kernel already has! */
- if ((wdt_stop != 0x45) && (wdt_stop != wdt_start))
- {
- if (!request_region(wdt_stop, 1, "SBC 60XX WDT"))
- {
- printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_stop);
+ if (wdt_stop != 0x45 && wdt_stop != wdt_start) {
+ if (!request_region(wdt_stop, 1, "SBC 60XX WDT")) {
+ printk(KERN_ERR PFX
+ "I/O address 0x%04x already in use\n",
+ wdt_stop);
rc = -EIO;
goto err_out_region1;
}
}
rc = register_reboot_notifier(&wdt_notifier);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
+ if (rc) {
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", rc);
goto err_out_region2;
}
rc = misc_register(&wdt_miscdev);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- wdt_miscdev.minor, rc);
+ if (rc) {
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt_miscdev.minor, rc);
goto err_out_reboot;
}
-
printk(KERN_INFO PFX "WDT driver for 60XX single board computer initialised. timeout=%d sec (nowayout=%d)\n",
timeout, nowayout);
@@ -383,10 +380,10 @@ static int __init sbc60xxwdt_init(void)
err_out_reboot:
unregister_reboot_notifier(&wdt_notifier);
err_out_region2:
- if ((wdt_stop != 0x45) && (wdt_stop != wdt_start))
- release_region(wdt_stop,1);
+ if (wdt_stop != 0x45 && wdt_stop != wdt_start)
+ release_region(wdt_stop, 1);
err_out_region1:
- release_region(wdt_start,1);
+ release_region(wdt_start, 1);
err_out:
return rc;
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 38/57] stg7240_wdt: unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (36 preceding siblings ...)
2008-05-19 13:08 ` [PATCH 37/57] sbc60xxwdt: clean up and switch " Alan Cox
@ 2008-05-19 13:08 ` Alan Cox
2008-05-19 13:08 ` [PATCH 39/57] sbc8360: clean up Alan Cox
` (19 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:08 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/sbc7240_wdt.c | 16 +++++++---------
1 files changed, 7 insertions(+), 9 deletions(-)
diff --git a/drivers/watchdog/sbc7240_wdt.c b/drivers/watchdog/sbc7240_wdt.c
index 4c8cefb..abccbe2 100644
--- a/drivers/watchdog/sbc7240_wdt.c
+++ b/drivers/watchdog/sbc7240_wdt.c
@@ -27,10 +27,10 @@
#include <linux/reboot.h>
#include <linux/types.h>
#include <linux/watchdog.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
#include <asm/atomic.h>
-#include <asm/io.h>
#include <asm/system.h>
-#include <asm/uaccess.h>
#define SBC7240_PREFIX "sbc7240_wdt: "
@@ -159,7 +159,7 @@ static int fop_close(struct inode *inode, struct file *file)
return 0;
}
-static struct watchdog_info ident = {
+static const struct watchdog_info ident = {
.options = WDIOF_KEEPALIVEPING|
WDIOF_SETTIMEOUT|
WDIOF_MAGICCLOSE,
@@ -168,14 +168,12 @@ static struct watchdog_info ident = {
};
-static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
switch (cmd) {
case WDIOC_GETSUPPORT:
- return copy_to_user
- ((void __user *)arg, &ident, sizeof(ident))
- ? -EFAULT : 0;
+ return copy_to_user((void __user *)arg, &ident, sizeof(ident))
+ ? -EFAULT : 0;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
return put_user(0, (int __user *)arg);
@@ -225,7 +223,7 @@ static const struct file_operations wdt_fops = {
.write = fop_write,
.open = fop_open,
.release = fop_close,
- .ioctl = fop_ioctl,
+ .unlocked_ioctl = fop_ioctl,
};
static struct miscdevice wdt_miscdev = {
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 39/57] sbc8360: clean up
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (37 preceding siblings ...)
2008-05-19 13:08 ` [PATCH 38/57] stg7240_wdt: unlocked_ioctl Alan Cox
@ 2008-05-19 13:08 ` Alan Cox
2008-05-19 13:08 ` [PATCH 40/57] sbc_epx_c3_wdt: switch to unlocked_ioctl Alan Cox
` (18 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:08 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
Needs a proper ioctl method adding and stuff
---
drivers/watchdog/sbc8360.c | 30 ++++++++++++------------------
1 files changed, 12 insertions(+), 18 deletions(-)
diff --git a/drivers/watchdog/sbc8360.c b/drivers/watchdog/sbc8360.c
index 2ee2677..c66fa66 100644
--- a/drivers/watchdog/sbc8360.c
+++ b/drivers/watchdog/sbc8360.c
@@ -48,13 +48,12 @@
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/moduleparam.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
static unsigned long sbc8360_is_open;
-static DEFINE_SPINLOCK(sbc8360_lock);
static char expect_close;
#define PFX "sbc8360: "
@@ -204,7 +203,8 @@ module_param(timeout, int, 0);
MODULE_PARM_DESC(timeout, "Index into timeout table (0-63) (default=27 (60s))");
module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout,
- "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* Kernel methods.
@@ -232,8 +232,8 @@ static void sbc8360_ping(void)
}
/* Userspace pings kernel driver, or requests clean close */
-static ssize_t sbc8360_write(struct file *file, const char __user * buf,
- size_t count, loff_t * ppos)
+static ssize_t sbc8360_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
if (count) {
if (!nowayout) {
@@ -257,16 +257,12 @@ static ssize_t sbc8360_write(struct file *file, const char __user * buf,
static int sbc8360_open(struct inode *inode, struct file *file)
{
- spin_lock(&sbc8360_lock);
- if (test_and_set_bit(0, &sbc8360_is_open)) {
- spin_unlock(&sbc8360_lock);
+ if (test_and_set_bit(0, &sbc8360_is_open))
return -EBUSY;
- }
if (nowayout)
__module_get(THIS_MODULE);
/* Activate and ping once to start the countdown */
- spin_unlock(&sbc8360_lock);
sbc8360_activate();
sbc8360_ping();
return nonseekable_open(inode, file);
@@ -274,16 +270,14 @@ static int sbc8360_open(struct inode *inode, struct file *file)
static int sbc8360_close(struct inode *inode, struct file *file)
{
- spin_lock(&sbc8360_lock);
if (expect_close == 42)
outb(0, SBC8360_ENABLE);
else
printk(KERN_CRIT PFX
- "SBC8360 device closed unexpectedly. SBC8360 will not stop!\n");
+ "SBC8360 device closed unexpectedly. SBC8360 will not stop!\n");
clear_bit(0, &sbc8360_is_open);
expect_close = 0;
- spin_unlock(&sbc8360_lock);
return 0;
}
@@ -382,13 +376,13 @@ static int __init sbc8360_init(void)
return 0;
- out_nomisc:
+out_nomisc:
unregister_reboot_notifier(&sbc8360_notifier);
- out_noreboot:
+out_noreboot:
release_region(SBC8360_BASETIME, 1);
- out_nobasetimereg:
+out_nobasetimereg:
release_region(SBC8360_ENABLE, 1);
- out:
+out:
return res;
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 40/57] sbc_epx_c3_wdt: switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (38 preceding siblings ...)
2008-05-19 13:08 ` [PATCH 39/57] sbc8360: clean up Alan Cox
@ 2008-05-19 13:08 ` Alan Cox
2008-05-19 13:08 ` [PATCH 41/57] sb_wdog: Clean up and " Alan Cox
` (17 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:08 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/sbc_epx_c3.c | 12 ++++++------
1 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/watchdog/sbc_epx_c3.c b/drivers/watchdog/sbc_epx_c3.c
index 82cbd88..70ff9cb 100644
--- a/drivers/watchdog/sbc_epx_c3.c
+++ b/drivers/watchdog/sbc_epx_c3.c
@@ -25,8 +25,8 @@
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/ioport.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
#define PFX "epx_c3: "
static int epx_c3_alive;
@@ -100,12 +100,12 @@ static ssize_t epx_c3_write(struct file *file, const char __user *data,
return len;
}
-static int epx_c3_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long epx_c3_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int options, retval = -EINVAL;
int __user *argp = (void __user *)arg;
- static struct watchdog_info ident = {
+ static const struct watchdog_info ident = {
.options = WDIOF_KEEPALIVEPING |
WDIOF_MAGICCLOSE,
.firmware_version = 0,
@@ -158,7 +158,7 @@ static const struct file_operations epx_c3_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = epx_c3_write,
- .ioctl = epx_c3_ioctl,
+ .unlocked_ioctl = epx_c3_ioctl,
.open = epx_c3_open,
.release = epx_c3_release,
};
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 41/57] sb_wdog: Clean up and switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (39 preceding siblings ...)
2008-05-19 13:08 ` [PATCH 40/57] sbc_epx_c3_wdt: switch to unlocked_ioctl Alan Cox
@ 2008-05-19 13:08 ` Alan Cox
2008-05-19 13:08 ` [PATCH 42/57] sc1200_wdt: clean up, fix locking and use unlocked_ioctl Alan Cox
` (16 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:08 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/sb_wdog.c | 78 +++++++++++++++++++++++---------------------
1 files changed, 40 insertions(+), 38 deletions(-)
diff --git a/drivers/watchdog/sb_wdog.c b/drivers/watchdog/sb_wdog.c
index b944314..c8b544c 100644
--- a/drivers/watchdog/sb_wdog.c
+++ b/drivers/watchdog/sb_wdog.c
@@ -57,6 +57,7 @@
#include <asm/sibyte/sb1250_int.h>
#include <asm/sibyte/sb1250_scd.h>
+static DEFINE_SPINLOCK(sbwd_lock);
/*
* set the initial count value of a timer
@@ -65,8 +66,10 @@
*/
void sbwdog_set(char __iomem *wdog, unsigned long t)
{
+ spin_lock(&sbwd_lock);
__raw_writeb(0, wdog - 0x10);
__raw_writeq(t & 0x7fffffUL, wdog);
+ spin_unlock(&sbwd_lock);
}
/*
@@ -77,7 +80,9 @@ void sbwdog_set(char __iomem *wdog, unsigned long t)
*/
void sbwdog_pet(char __iomem *wdog)
{
+ spin_lock(&sbwd_lock);
__raw_writeb(__raw_readb(wdog) | 1, wdog);
+ spin_unlock(&sbwd_lock);
}
static unsigned long sbwdog_gate; /* keeps it to one thread only */
@@ -86,8 +91,9 @@ static char __iomem *user_dog = (char __iomem *)(IO_BASE + (A_SCD_WDOG_CFG_1));
static unsigned long timeout = 0x7fffffUL; /* useconds: 8.3ish secs. */
static int expect_close;
-static struct watchdog_info ident = {
- .options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
+static const struct watchdog_info ident = {
+ .options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT |
+ WDIOF_KEEPALIVEPING,
.identity = "SiByte Watchdog",
};
@@ -97,9 +103,8 @@ static struct watchdog_info ident = {
static int sbwdog_open(struct inode *inode, struct file *file)
{
nonseekable_open(inode, file);
- if (test_and_set_bit(0, &sbwdog_gate)) {
+ if (test_and_set_bit(0, &sbwdog_gate))
return -EBUSY;
- }
__module_get(THIS_MODULE);
/*
@@ -120,8 +125,9 @@ static int sbwdog_release(struct inode *inode, struct file *file)
__raw_writeb(0, user_dog);
module_put(THIS_MODULE);
} else {
- printk(KERN_CRIT "%s: Unexpected close, not stopping watchdog!\n",
- ident.identity);
+ printk(KERN_CRIT
+ "%s: Unexpected close, not stopping watchdog!\n",
+ ident.identity);
sbwdog_pet(user_dog);
}
clear_bit(0, &sbwdog_gate);
@@ -147,12 +153,10 @@ static ssize_t sbwdog_write(struct file *file, const char __user *data,
for (i = 0; i != len; i++) {
char c;
- if (get_user(c, data + i)) {
+ if (get_user(c, data + i))
return -EFAULT;
- }
- if (c == 'V') {
+ if (c == 'V')
expect_close = 42;
- }
}
sbwdog_pet(user_dog);
}
@@ -160,8 +164,8 @@ static ssize_t sbwdog_write(struct file *file, const char __user *data,
return len;
}
-static int sbwdog_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long sbwdog_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int ret = -ENOTTY;
unsigned long time;
@@ -180,9 +184,8 @@ static int sbwdog_ioctl(struct inode *inode, struct file *file,
case WDIOC_SETTIMEOUT:
ret = get_user(time, p);
- if (ret) {
+ if (ret)
break;
- }
time *= 1000000;
if (time > 0x7fffffUL) {
@@ -226,18 +229,16 @@ sbwdog_notify_sys(struct notifier_block *this, unsigned long code, void *erf)
return NOTIFY_DONE;
}
-static const struct file_operations sbwdog_fops =
-{
+static const struct file_operations sbwdog_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = sbwdog_write,
- .ioctl = sbwdog_ioctl,
+ .unlocked_ioctl = sbwdog_ioctl,
.open = sbwdog_open,
.release = sbwdog_release,
};
-static struct miscdevice sbwdog_miscdev =
-{
+static struct miscdevice sbwdog_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &sbwdog_fops,
@@ -267,13 +268,12 @@ irqreturn_t sbwdog_interrupt(int irq, void *addr)
/*
* if it's the second watchdog timer, it's for those users
*/
- if (wd_cfg_reg == user_dog) {
+ if (wd_cfg_reg == user_dog)
printk(KERN_CRIT
"%s in danger of initiating system reset in %ld.%01ld seconds\n",
ident.identity, wd_init / 1000000, (wd_init / 100000) % 10);
- } else {
+ else
cfg |= 1;
- }
__raw_writeb(cfg, wd_cfg_reg);
@@ -289,28 +289,31 @@ static int __init sbwdog_init(void)
*/
ret = register_reboot_notifier(&sbwdog_notifier);
if (ret) {
- printk (KERN_ERR "%s: cannot register reboot notifier (err=%d)\n",
- ident.identity, ret);
+ printk(KERN_ERR
+ "%s: cannot register reboot notifier (err=%d)\n",
+ ident.identity, ret);
return ret;
}
/*
* get the resources
*/
- ret = misc_register(&sbwdog_miscdev);
- if (ret == 0) {
- printk(KERN_INFO "%s: timeout is %ld.%ld secs\n", ident.identity,
- timeout / 1000000, (timeout / 100000) % 10);
- }
ret = request_irq(1, sbwdog_interrupt, IRQF_DISABLED | IRQF_SHARED,
ident.identity, (void *)user_dog);
if (ret) {
- printk(KERN_ERR "%s: failed to request irq 1 - %d\n", ident.identity,
- ret);
- misc_deregister(&sbwdog_miscdev);
+ printk(KERN_ERR "%s: failed to request irq 1 - %d\n",
+ ident.identity, ret);
+ return ret;
}
+ ret = misc_register(&sbwdog_miscdev);
+ if (ret == 0) {
+ printk(KERN_INFO "%s: timeout is %ld.%ld secs\n",
+ ident.identity,
+ timeout / 1000000, (timeout / 100000) % 10);
+ } else
+ free_irq(1, (void *)user_dog);
return ret;
}
@@ -327,7 +330,7 @@ MODULE_DESCRIPTION("SiByte Watchdog");
module_param(timeout, ulong, 0);
MODULE_PARM_DESC(timeout,
- "Watchdog timeout in microseconds (max/default 8388607 or 8.3ish secs)");
+ "Watchdog timeout in microseconds (max/default 8388607 or 8.3ish secs)");
MODULE_LICENSE("GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
@@ -336,16 +339,15 @@ MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
* example code that can be put in a platform code area to utilize the
* first watchdog timer for the kernels own purpose.
- void
-platform_wd_setup(void)
+void platform_wd_setup(void)
{
int ret;
- ret = request_irq(0, sbwdog_interrupt, IRQF_DISABLED | IRQF_SHARED,
+ ret = request_irq(1, sbwdog_interrupt, IRQF_DISABLED | IRQF_SHARED,
"Kernel Watchdog", IOADDR(A_SCD_WDOG_CFG_0));
if (ret) {
- printk(KERN_CRIT "Watchdog IRQ zero(0) failed to be requested - %d\n",
- ret);
+ printk(KERN_CRIT
+ "Watchdog IRQ zero(0) failed to be requested - %d\n", ret);
}
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 42/57] sc1200_wdt: clean up, fix locking and use unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (40 preceding siblings ...)
2008-05-19 13:08 ` [PATCH 41/57] sb_wdog: Clean up and " Alan Cox
@ 2008-05-19 13:08 ` Alan Cox
2008-05-19 13:08 ` [PATCH 43/57] sc520_wdt: Clean up and switch to unlocked_ioctl Alan Cox
` (15 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:08 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/sc1200wdt.c | 203 ++++++++++++++++++++++++------------------
1 files changed, 114 insertions(+), 89 deletions(-)
diff --git a/drivers/watchdog/sc1200wdt.c b/drivers/watchdog/sc1200wdt.c
index 35cddff..7e5c9cc 100644
--- a/drivers/watchdog/sc1200wdt.c
+++ b/drivers/watchdog/sc1200wdt.c
@@ -15,14 +15,18 @@
*
* Changelog:
* 20020220 Zwane Mwaikambo Code based on datasheet, no hardware.
- * 20020221 Zwane Mwaikambo Cleanups as suggested by Jeff Garzik and Alan Cox.
+ * 20020221 Zwane Mwaikambo Cleanups as suggested by Jeff Garzik
+ * and Alan Cox.
* 20020222 Zwane Mwaikambo Added probing.
* 20020225 Zwane Mwaikambo Added ISAPNP support.
* 20020412 Rob Radez Broke out start/stop functions
- * <rob@osinvestor.com> Return proper status instead of temperature warning
- * Add WDIOC_GETBOOTSTATUS and WDIOC_SETOPTIONS ioctls
+ * <rob@osinvestor.com> Return proper status instead of
+ * temperature warning
+ * Add WDIOC_GETBOOTSTATUS and
+ * WDIOC_SETOPTIONS ioctls
* Fix CONFIG_WATCHDOG_NOWAYOUT
- * 20020530 Joel Becker Add Matt Domsch's nowayout module option
+ * 20020530 Joel Becker Add Matt Domsch's nowayout module
+ * option
* 20030116 Adam Belay Updated to the latest pnp code
*
*/
@@ -39,9 +43,8 @@
#include <linux/pnp.h>
#include <linux/fs.h>
#include <linux/semaphore.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
#define SC1200_MODULE_VER "build 20020303"
#define SC1200_MODULE_NAME "sc1200wdt"
@@ -72,7 +75,7 @@ static char banner[] __initdata = KERN_INFO PFX SC1200_MODULE_VER;
static int timeout = 1;
static int io = -1;
static int io_len = 2; /* for non plug and play */
-static struct semaphore open_sem;
+static unsigned long open_flag;
static char expect_close;
static DEFINE_SPINLOCK(sc1200wdt_lock); /* io port access serialisation */
@@ -81,7 +84,8 @@ static int isapnp = 1;
static struct pnp_dev *wdt_dev;
module_param(isapnp, int, 0);
-MODULE_PARM_DESC(isapnp, "When set to 0 driver ISA PnP support will be disabled");
+MODULE_PARM_DESC(isapnp,
+ "When set to 0 driver ISA PnP support will be disabled");
#endif
module_param(io, int, 0);
@@ -91,26 +95,40 @@ MODULE_PARM_DESC(timeout, "range is 0-255 minutes, default is 1");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/* Read from Data Register */
-static inline void sc1200wdt_read_data(unsigned char index, unsigned char *data)
+static inline void __sc1200wdt_read_data(unsigned char index,
+ unsigned char *data)
{
- spin_lock(&sc1200wdt_lock);
outb_p(index, PMIR);
*data = inb(PMDR);
- spin_unlock(&sc1200wdt_lock);
}
+static void sc1200wdt_read_data(unsigned char index, unsigned char *data)
+{
+ spin_lock(&sc1200wdt_lock);
+ __sc1200wdt_read_data(index, data);
+ spin_unlock(&sc1200wdt_lock);
+}
/* Write to Data Register */
-static inline void sc1200wdt_write_data(unsigned char index, unsigned char data)
+static inline void __sc1200wdt_write_data(unsigned char index,
+ unsigned char data)
{
- spin_lock(&sc1200wdt_lock);
outb_p(index, PMIR);
outb(data, PMDR);
+}
+
+static inline void sc1200wdt_write_data(unsigned char index,
+ unsigned char data)
+{
+ spin_lock(&sc1200wdt_lock);
+ __sc1200wdt_write_data(index, data);
spin_unlock(&sc1200wdt_lock);
}
@@ -118,13 +136,16 @@ static inline void sc1200wdt_write_data(unsigned char index, unsigned char data)
static void sc1200wdt_start(void)
{
unsigned char reg;
+ spin_lock(&sc1200wdt_lock);
- sc1200wdt_read_data(WDCF, ®);
+ __sc1200wdt_read_data(WDCF, ®);
/* assert WDO when any of the following interrupts are triggered too */
reg |= (KBC_IRQ | MSE_IRQ | UART1_IRQ | UART2_IRQ);
- sc1200wdt_write_data(WDCF, reg);
+ __sc1200wdt_write_data(WDCF, reg);
/* set the timeout and get the ball rolling */
- sc1200wdt_write_data(WDTO, timeout);
+ __sc1200wdt_write_data(WDTO, timeout);
+
+ spin_unlock(&sc1200wdt_lock);
}
@@ -144,14 +165,15 @@ static inline int sc1200wdt_status(void)
* KEEPALIVEPING which is a bit of a kludge because there's nothing
* else for enabled/disabled status
*/
- return (ret & 0x01) ? 0 : WDIOF_KEEPALIVEPING; /* bits 1 - 7 are undefined */
+ return (ret & 0x01) ? 0 : WDIOF_KEEPALIVEPING;
+ /* bits 1 - 7 are undefined */
}
static int sc1200wdt_open(struct inode *inode, struct file *file)
{
/* allow one at a time */
- if (down_trylock(&open_sem))
+ if (test_and_set_bit(0, &open_flag))
return -EBUSY;
if (timeout > MAX_TIMEOUT)
@@ -164,71 +186,71 @@ static int sc1200wdt_open(struct inode *inode, struct file *file)
}
-static int sc1200wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+static long sc1200wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int new_timeout;
void __user *argp = (void __user *)arg;
int __user *p = argp;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ static const struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE,
.firmware_version = 0,
.identity = "PC87307/PC97307",
};
switch (cmd) {
- default:
- return -ENOTTY;
-
- case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof ident))
- return -EFAULT;
- return 0;
- case WDIOC_GETSTATUS:
- return put_user(sc1200wdt_status(), p);
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &ident, sizeof ident))
+ return -EFAULT;
+ return 0;
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
+ case WDIOC_GETSTATUS:
+ return put_user(sc1200wdt_status(), p);
- case WDIOC_KEEPALIVE:
- sc1200wdt_write_data(WDTO, timeout);
- return 0;
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
- case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, p))
- return -EFAULT;
-
- /* the API states this is given in secs */
- new_timeout /= 60;
- if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
- return -EINVAL;
-
- timeout = new_timeout;
- sc1200wdt_write_data(WDTO, timeout);
- /* fall through and return the new timeout */
-
- case WDIOC_GETTIMEOUT:
- return put_user(timeout * 60, p);
+ case WDIOC_KEEPALIVE:
+ sc1200wdt_write_data(WDTO, timeout);
+ return 0;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+ /* the API states this is given in secs */
+ new_timeout /= 60;
+ if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
+ return -EINVAL;
+ timeout = new_timeout;
+ sc1200wdt_write_data(WDTO, timeout);
+ /* fall through and return the new timeout */
- case WDIOC_SETOPTIONS:
- {
- int options, retval = -EINVAL;
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout * 60, p);
- if (get_user(options, p))
- return -EFAULT;
+ case WDIOC_SETOPTIONS:
+ {
+ int options, retval = -EINVAL;
- if (options & WDIOS_DISABLECARD) {
- sc1200wdt_stop();
- retval = 0;
- }
+ if (get_user(options, p))
+ return -EFAULT;
- if (options & WDIOS_ENABLECARD) {
- sc1200wdt_start();
- retval = 0;
- }
+ if (options & WDIOS_DISABLECARD) {
+ sc1200wdt_stop();
+ retval = 0;
+ }
- return retval;
+ if (options & WDIOS_ENABLECARD) {
+ sc1200wdt_start();
+ retval = 0;
}
+
+ return retval;
+ }
+ default:
+ return -ENOTTY;
}
}
@@ -240,16 +262,18 @@ static int sc1200wdt_release(struct inode *inode, struct file *file)
printk(KERN_INFO PFX "Watchdog disabled\n");
} else {
sc1200wdt_write_data(WDTO, timeout);
- printk(KERN_CRIT PFX "Unexpected close!, timeout = %d min(s)\n", timeout);
+ printk(KERN_CRIT PFX
+ "Unexpected close!, timeout = %d min(s)\n", timeout);
}
- up(&open_sem);
+ clear_bit(0, &open_flag);
expect_close = 0;
return 0;
}
-static ssize_t sc1200wdt_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
+static ssize_t sc1200wdt_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
{
if (len) {
if (!nowayout) {
@@ -275,7 +299,8 @@ static ssize_t sc1200wdt_write(struct file *file, const char __user *data, size_
}
-static int sc1200wdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
+static int sc1200wdt_notify_sys(struct notifier_block *this,
+ unsigned long code, void *unused)
{
if (code == SYS_DOWN || code == SYS_HALT)
sc1200wdt_stop();
@@ -284,23 +309,20 @@ static int sc1200wdt_notify_sys(struct notifier_block *this, unsigned long code,
}
-static struct notifier_block sc1200wdt_notifier =
-{
+static struct notifier_block sc1200wdt_notifier = {
.notifier_call = sc1200wdt_notify_sys,
};
-static const struct file_operations sc1200wdt_fops =
-{
+static const struct file_operations sc1200wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = sc1200wdt_write,
- .ioctl = sc1200wdt_ioctl,
+ .unlocked_ioctl = sc1200wdt_ioctl,
.open = sc1200wdt_open,
.release = sc1200wdt_release,
};
-static struct miscdevice sc1200wdt_miscdev =
-{
+static struct miscdevice sc1200wdt_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &sc1200wdt_fops,
@@ -312,14 +334,14 @@ static int __init sc1200wdt_probe(void)
/* The probe works by reading the PMC3 register's default value of 0x0e
* there is one caveat, if the device disables the parallel port or any
* of the UARTs we won't be able to detect it.
- * Nb. This could be done with accuracy by reading the SID registers, but
- * we don't have access to those io regions.
+ * NB. This could be done with accuracy by reading the SID registers,
+ * but we don't have access to those io regions.
*/
unsigned char reg;
sc1200wdt_read_data(PMC3, ®);
- reg &= 0x0f; /* we don't want the UART busy bits */
+ reg &= 0x0f; /* we don't want the UART busy bits */
return (reg == 0x0e) ? 0 : -ENODEV;
}
@@ -332,7 +354,8 @@ static struct pnp_device_id scl200wdt_pnp_devices[] = {
{.id = ""},
};
-static int scl200wdt_pnp_probe(struct pnp_dev * dev, const struct pnp_device_id *dev_id)
+static int scl200wdt_pnp_probe(struct pnp_dev *dev,
+ const struct pnp_device_id *dev_id)
{
/* this driver only supports one card at a time */
if (wdt_dev || !isapnp)
@@ -347,13 +370,14 @@ static int scl200wdt_pnp_probe(struct pnp_dev * dev, const struct pnp_device_id
return -EBUSY;
}
- printk(KERN_INFO "scl200wdt: PnP device found at io port %#x/%d\n", io, io_len);
+ printk(KERN_INFO "scl200wdt: PnP device found at io port %#x/%d\n",
+ io, io_len);
return 0;
}
-static void scl200wdt_pnp_remove(struct pnp_dev * dev)
+static void scl200wdt_pnp_remove(struct pnp_dev *dev)
{
- if (wdt_dev){
+ if (wdt_dev) {
release_region(io, io_len);
wdt_dev = NULL;
}
@@ -375,8 +399,6 @@ static int __init sc1200wdt_init(void)
printk("%s\n", banner);
- sema_init(&open_sem, 1);
-
#if defined CONFIG_PNP
if (isapnp) {
ret = pnp_register_driver(&scl200wdt_pnp_driver);
@@ -410,13 +432,16 @@ static int __init sc1200wdt_init(void)
ret = register_reboot_notifier(&sc1200wdt_notifier);
if (ret) {
- printk(KERN_ERR PFX "Unable to register reboot notifier err = %d\n", ret);
+ printk(KERN_ERR PFX
+ "Unable to register reboot notifier err = %d\n", ret);
goto out_io;
}
ret = misc_register(&sc1200wdt_miscdev);
if (ret) {
- printk(KERN_ERR PFX "Unable to register miscdev on minor %d\n", WATCHDOG_MINOR);
+ printk(KERN_ERR PFX
+ "Unable to register miscdev on minor %d\n",
+ WATCHDOG_MINOR);
goto out_rbt;
}
@@ -446,7 +471,7 @@ static void __exit sc1200wdt_exit(void)
unregister_reboot_notifier(&sc1200wdt_notifier);
#if defined CONFIG_PNP
- if(isapnp)
+ if (isapnp)
pnp_unregister_driver(&scl200wdt_pnp_driver);
else
#endif
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 43/57] sc520_wdt: Clean up and switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (41 preceding siblings ...)
2008-05-19 13:08 ` [PATCH 42/57] sc1200_wdt: clean up, fix locking and use unlocked_ioctl Alan Cox
@ 2008-05-19 13:08 ` Alan Cox
2008-05-19 13:08 ` [PATCH 44/57] scx200_wdt: clean " Alan Cox
` (14 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:08 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/sc520_wdt.c | 161 ++++++++++++++++++++++--------------------
1 files changed, 86 insertions(+), 75 deletions(-)
diff --git a/drivers/watchdog/sc520_wdt.c b/drivers/watchdog/sc520_wdt.c
index 2847324..525555a 100644
--- a/drivers/watchdog/sc520_wdt.c
+++ b/drivers/watchdog/sc520_wdt.c
@@ -64,9 +64,9 @@
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/jiffies.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
#define OUR_NAME "sc520_wdt"
@@ -91,13 +91,18 @@
*/
#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */
-static int timeout = WATCHDOG_TIMEOUT; /* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
+/* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
+static int timeout = WATCHDOG_TIMEOUT;
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds. (1 <= timeout <= 3600, default="
+ __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* AMD Elan SC520 - Watchdog Timer Registers
@@ -136,8 +141,7 @@ static void wdt_timer_ping(unsigned long data)
/* If we got a heartbeat pulse within the WDT_US_INTERVAL
* we agree to ping the WDT
*/
- if(time_before(jiffies, next_heartbeat))
- {
+ if (time_before(jiffies, next_heartbeat)) {
/* Ping the WDT */
spin_lock(&wdt_spinlock);
writew(0xAAAA, wdtmrctl);
@@ -146,9 +150,9 @@ static void wdt_timer_ping(unsigned long data)
/* Re-set the timer interval */
mod_timer(&timer, jiffies + WDT_INTERVAL);
- } else {
- printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
- }
+ } else
+ printk(KERN_WARNING PFX
+ "Heartbeat lost! Will not ping the watchdog\n");
}
/*
@@ -162,7 +166,7 @@ static void wdt_config(int writeval)
/* buy some time (ping) */
spin_lock_irqsave(&wdt_spinlock, flags);
- dummy=readw(wdtmrctl); /* ensure write synchronization */
+ dummy = readw(wdtmrctl); /* ensure write synchronization */
writew(0xAAAA, wdtmrctl);
writew(0x5555, wdtmrctl);
/* unlock WDT = make WDT configuration register writable one time */
@@ -219,10 +223,11 @@ static int wdt_set_heartbeat(int t)
* /dev/watchdog handling
*/
-static ssize_t fop_write(struct file * file, const char __user * buf, size_t count, loff_t * ppos)
+static ssize_t fop_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
/* See if we got the magic character 'V' and reload the timer */
- if(count) {
+ if (count) {
if (!nowayout) {
size_t ofs;
@@ -231,25 +236,26 @@ static ssize_t fop_write(struct file * file, const char __user * buf, size_t cou
wdt_expect_close = 0;
/* now scan */
- for(ofs = 0; ofs != count; ofs++) {
+ for (ofs = 0; ofs != count; ofs++) {
char c;
if (get_user(c, buf + ofs))
return -EFAULT;
- if(c == 'V')
+ if (c == 'V')
wdt_expect_close = 42;
}
}
- /* Well, anyhow someone wrote to us, we should return that favour */
+ /* Well, anyhow someone wrote to us, we should
+ return that favour */
wdt_keepalive();
}
return count;
}
-static int fop_open(struct inode * inode, struct file * file)
+static int fop_open(struct inode *inode, struct file *file)
{
/* Just in case we're already talking to someone... */
- if(test_and_set_bit(0, &wdt_is_open))
+ if (test_and_set_bit(0, &wdt_is_open))
return -EBUSY;
if (nowayout)
__module_get(THIS_MODULE);
@@ -259,12 +265,13 @@ static int fop_open(struct inode * inode, struct file * file)
return nonseekable_open(inode, file);
}
-static int fop_close(struct inode * inode, struct file * file)
+static int fop_close(struct inode *inode, struct file *file)
{
- if(wdt_expect_close == 42) {
+ if (wdt_expect_close == 42)
wdt_turnoff();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ else {
+ printk(KERN_CRIT PFX
+ "Unexpected close, not stopping watchdog!\n");
wdt_keepalive();
}
clear_bit(0, &wdt_is_open);
@@ -272,63 +279,63 @@ static int fop_close(struct inode * inode, struct file * file)
return 0;
}
-static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static int fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ static const struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT
+ | WDIOF_MAGICCLOSE,
.firmware_version = 1,
.identity = "SC520",
};
- switch(cmd)
+ switch (cmd)
{
- default:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- wdt_keepalive();
- return 0;
- case WDIOC_SETOPTIONS:
- {
- int new_options, retval = -EINVAL;
-
- if(get_user(new_options, p))
- return -EFAULT;
-
- if(new_options & WDIOS_DISABLECARD) {
- wdt_turnoff();
- retval = 0;
- }
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ wdt_keepalive();
+ return 0;
+ case WDIOC_SETOPTIONS:
+ {
+ int new_options, retval = -EINVAL;
- if(new_options & WDIOS_ENABLECARD) {
- wdt_startup();
- retval = 0;
- }
+ if (get_user(new_options, p))
+ return -EFAULT;
+
+ if (new_options & WDIOS_DISABLECARD) {
+ wdt_turnoff();
+ retval = 0;
+ }
- return retval;
+ if (new_options & WDIOS_ENABLECARD) {
+ wdt_startup();
+ retval = 0;
}
- case WDIOC_SETTIMEOUT:
- {
- int new_timeout;
- if(get_user(new_timeout, p))
- return -EFAULT;
+ return retval;
+ }
+ case WDIOC_SETTIMEOUT:
+ {
+ int new_timeout;
- if(wdt_set_heartbeat(new_timeout))
- return -EINVAL;
+ if (get_user(new_timeout, p))
+ return -EFAULT;
- wdt_keepalive();
- /* Fall through */
- }
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
+ if (wdt_set_heartbeat(new_timeout))
+ return -EINVAL;
+
+ wdt_keepalive();
+ /* Fall through */
+ }
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
}
}
@@ -354,7 +361,7 @@ static struct miscdevice wdt_miscdev = {
static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
- if(code==SYS_DOWN || code==SYS_HALT)
+ if (code == SYS_DOWN || code == SYS_HALT)
wdt_turnoff();
return NOTIFY_DONE;
}
@@ -383,11 +390,13 @@ static int __init sc520_wdt_init(void)
{
int rc = -EBUSY;
- /* Check that the timeout value is within it's range ; if not reset to the default */
+ /* Check that the timeout value is within it's range ;
+ if not reset to the default */
if (wdt_set_heartbeat(timeout)) {
wdt_set_heartbeat(WATCHDOG_TIMEOUT);
- printk(KERN_INFO PFX "timeout value must be 1<=timeout<=3600, using %d\n",
- WATCHDOG_TIMEOUT);
+ printk(KERN_INFO PFX
+ "timeout value must be 1 <= timeout <= 3600, using %d\n",
+ WATCHDOG_TIMEOUT);
}
wdtmrctl = ioremap((unsigned long)(MMCR_BASE + OFFS_WDTMRCTL), 2);
@@ -399,20 +408,22 @@ static int __init sc520_wdt_init(void)
rc = register_reboot_notifier(&wdt_notifier);
if (rc) {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", rc);
goto err_out_ioremap;
}
rc = misc_register(&wdt_miscdev);
if (rc) {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, rc);
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, rc);
goto err_out_notifier;
}
- printk(KERN_INFO PFX "WDT driver for SC520 initialised. timeout=%d sec (nowayout=%d)\n",
- timeout,nowayout);
+ printk(KERN_INFO PFX
+ "WDT driver for SC520 initialised. timeout=%d sec (nowayout=%d)\n",
+ timeout, nowayout);
return 0;
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 44/57] scx200_wdt: clean up and switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (42 preceding siblings ...)
2008-05-19 13:08 ` [PATCH 43/57] sc520_wdt: Clean up and switch to unlocked_ioctl Alan Cox
@ 2008-05-19 13:08 ` Alan Cox
2008-05-19 13:08 ` [PATCH 45/57] shwdt: coding style, cleanup, " Alan Cox
` (13 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:08 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/sc520_wdt.c | 4 +--
drivers/watchdog/scx200_wdt.c | 59 +++++++++++++++++++++--------------------
2 files changed, 32 insertions(+), 31 deletions(-)
diff --git a/drivers/watchdog/sc520_wdt.c b/drivers/watchdog/sc520_wdt.c
index 525555a..01de239 100644
--- a/drivers/watchdog/sc520_wdt.c
+++ b/drivers/watchdog/sc520_wdt.c
@@ -279,7 +279,7 @@ static int fop_close(struct inode *inode, struct file *file)
return 0;
}
-static int fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+static long fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
@@ -345,7 +345,7 @@ static const struct file_operations wdt_fops = {
.write = fop_write,
.open = fop_open,
.release = fop_close,
- .ioctl = fop_ioctl,
+ .unlocked_ioctl = fop_ioctl,
};
static struct miscdevice wdt_miscdev = {
diff --git a/drivers/watchdog/scx200_wdt.c b/drivers/watchdog/scx200_wdt.c
index d55882b..7c1de94 100644
--- a/drivers/watchdog/scx200_wdt.c
+++ b/drivers/watchdog/scx200_wdt.c
@@ -27,9 +27,8 @@
#include <linux/fs.h>
#include <linux/ioport.h>
#include <linux/scx200.h>
-
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
#define NAME "scx200_wdt"
@@ -47,8 +46,9 @@ module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout, "Disable watchdog shutdown on close");
static u16 wdto_restart;
-static struct semaphore open_semaphore;
static char expect_close;
+static unsigned long open_lock;
+static DEFINE_SPINLOCK(scx_lock);
/* Bits of the WDCNFG register */
#define W_ENABLE 0x00fa /* Enable watchdog */
@@ -59,7 +59,9 @@ static char expect_close;
static void scx200_wdt_ping(void)
{
+ spin_lock(&scx_lock);
outw(wdto_restart, scx200_cb_base + SCx200_WDT_WDTO);
+ spin_unlock(&scx_lock);
}
static void scx200_wdt_update_margin(void)
@@ -73,9 +75,11 @@ static void scx200_wdt_enable(void)
printk(KERN_DEBUG NAME ": enabling watchdog timer, wdto_restart = %d\n",
wdto_restart);
+ spin_lock(&scx_lock);
outw(0, scx200_cb_base + SCx200_WDT_WDTO);
outb(SCx200_WDT_WDSTS_WDOVF, scx200_cb_base + SCx200_WDT_WDSTS);
outw(W_ENABLE, scx200_cb_base + SCx200_WDT_WDCNFG);
+ spin_unlock(&scx_lock);
scx200_wdt_ping();
}
@@ -84,15 +88,17 @@ static void scx200_wdt_disable(void)
{
printk(KERN_DEBUG NAME ": disabling watchdog timer\n");
+ spin_lock(&scx_lock);
outw(0, scx200_cb_base + SCx200_WDT_WDTO);
outb(SCx200_WDT_WDSTS_WDOVF, scx200_cb_base + SCx200_WDT_WDSTS);
outw(W_DISABLE, scx200_cb_base + SCx200_WDT_WDCNFG);
+ spin_unlock(&scx_lock);
}
static int scx200_wdt_open(struct inode *inode, struct file *file)
{
/* only allow one at a time */
- if (down_trylock(&open_semaphore))
+ if (test_and_set_bit(0, &open_lock))
return -EBUSY;
scx200_wdt_enable();
@@ -101,13 +107,12 @@ static int scx200_wdt_open(struct inode *inode, struct file *file)
static int scx200_wdt_release(struct inode *inode, struct file *file)
{
- if (expect_close != 42) {
+ if (expect_close != 42)
printk(KERN_WARNING NAME ": watchdog device closed unexpectedly, will not disable the watchdog timer\n");
- } else if (!nowayout) {
+ else if (!nowayout)
scx200_wdt_disable();
- }
expect_close = 0;
- up(&open_semaphore);
+ clear_bit(0, &open_lock);
return 0;
}
@@ -122,8 +127,7 @@ static int scx200_wdt_notify_sys(struct notifier_block *this,
return NOTIFY_DONE;
}
-static struct notifier_block scx200_wdt_notifier =
-{
+static struct notifier_block scx200_wdt_notifier = {
.notifier_call = scx200_wdt_notify_sys,
};
@@ -131,8 +135,7 @@ static ssize_t scx200_wdt_write(struct file *file, const char __user *data,
size_t len, loff_t *ppos)
{
/* check for a magic close character */
- if (len)
- {
+ if (len) {
size_t i;
scx200_wdt_ping();
@@ -152,15 +155,15 @@ static ssize_t scx200_wdt_write(struct file *file, const char __user *data,
return 0;
}
-static int scx200_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long scx200_wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
- static struct watchdog_info ident = {
+ static const struct watchdog_info ident = {
.identity = "NatSemi SCx200 Watchdog",
.firmware_version = 1,
- .options = (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING),
+ .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
};
int new_margin;
@@ -168,7 +171,7 @@ static int scx200_wdt_ioctl(struct inode *inode, struct file *file,
default:
return -ENOTTY;
case WDIOC_GETSUPPORT:
- if(copy_to_user(argp, &ident, sizeof(ident)))
+ if (copy_to_user(argp, &ident, sizeof(ident)))
return -EFAULT;
return 0;
case WDIOC_GETSTATUS:
@@ -195,18 +198,18 @@ static int scx200_wdt_ioctl(struct inode *inode, struct file *file,
}
static const struct file_operations scx200_wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = scx200_wdt_write,
- .ioctl = scx200_wdt_ioctl,
- .open = scx200_wdt_open,
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = scx200_wdt_write,
+ .unlocked_ioctl = scx200_wdt_ioctl,
+ .open = scx200_wdt_open,
.release = scx200_wdt_release,
};
static struct miscdevice scx200_wdt_miscdev = {
.minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &scx200_wdt_fops,
+ .name = "watchdog",
+ .fops = &scx200_wdt_fops,
};
static int __init scx200_wdt_init(void)
@@ -229,8 +232,6 @@ static int __init scx200_wdt_init(void)
scx200_wdt_update_margin();
scx200_wdt_disable();
- sema_init(&open_semaphore, 1);
-
r = register_reboot_notifier(&scx200_wdt_notifier);
if (r) {
printk(KERN_ERR NAME ": unable to register reboot notifier");
@@ -263,7 +264,7 @@ module_exit(scx200_wdt_cleanup);
/*
Local variables:
- compile-command: "make -k -C ../.. SUBDIRS=drivers/char modules"
- c-basic-offset: 8
+ compile-command: "make -k -C ../.. SUBDIRS=drivers/char modules"
+ c-basic-offset: 8
End:
*/
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 45/57] shwdt: coding style, cleanup, switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (43 preceding siblings ...)
2008-05-19 13:08 ` [PATCH 44/57] scx200_wdt: clean " Alan Cox
@ 2008-05-19 13:08 ` Alan Cox
2008-05-19 13:09 ` [PATCH 46/57] smsc37b787_wdt: coding style, " Alan Cox
` (12 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:08 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/shwdt.c | 139 +++++++++++++++++++++++++++-------------------
1 files changed, 82 insertions(+), 57 deletions(-)
diff --git a/drivers/watchdog/shwdt.c b/drivers/watchdog/shwdt.c
index 1277f7e..60f0036 100644
--- a/drivers/watchdog/shwdt.c
+++ b/drivers/watchdog/shwdt.c
@@ -28,9 +28,9 @@
#include <linux/ioport.h>
#include <linux/fs.h>
#include <linux/mm.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/watchdog.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <linux/watchdog.h>
#define PFX "shwdt: "
@@ -72,6 +72,7 @@ static struct watchdog_info sh_wdt_info;
static char shwdt_expect_close;
static DEFINE_TIMER(timer, sh_wdt_ping, 0, 0);
static unsigned long next_heartbeat;
+static DEFINE_SPINLOCK(shwdt_lock);
#define WATCHDOG_HEARTBEAT 30 /* 30 sec default heartbeat */
static int heartbeat = WATCHDOG_HEARTBEAT; /* in seconds */
@@ -86,6 +87,9 @@ static int nowayout = WATCHDOG_NOWAYOUT;
static void sh_wdt_start(void)
{
__u8 csr;
+ unsigned long flags;
+
+ spin_lock_irqsave(&wdt_lock, flags);
next_heartbeat = jiffies + (heartbeat * HZ);
mod_timer(&timer, next_ping_period(clock_division_ratio));
@@ -123,6 +127,7 @@ static void sh_wdt_start(void)
csr &= ~RSTCSR_RSTS;
sh_wdt_write_rstcsr(csr);
#endif
+ spin_unlock_irqrestore(&wdt_lock, flags);
}
/**
@@ -132,12 +137,16 @@ static void sh_wdt_start(void)
static void sh_wdt_stop(void)
{
__u8 csr;
+ unsigned long flags;
+
+ spin_lock_irqsave(&wdt_lock, flags);
del_timer(&timer);
csr = sh_wdt_read_csr();
csr &= ~WTCSR_TME;
sh_wdt_write_csr(csr);
+ spin_unlock_irqrestore(&wdt_lock, flags);
}
/**
@@ -146,7 +155,11 @@ static void sh_wdt_stop(void)
*/
static inline void sh_wdt_keepalive(void)
{
+ unsigned long flags;
+
+ spin_lock_irqsave(&wdt_lock, flags);
next_heartbeat = jiffies + (heartbeat * HZ);
+ spin_unlock_irqrestore(&wdt_lock, flags);
}
/**
@@ -155,10 +168,14 @@ static inline void sh_wdt_keepalive(void)
*/
static int sh_wdt_set_heartbeat(int t)
{
- if (unlikely((t < 1) || (t > 3600))) /* arbitrary upper limit */
+ unsigned long flags;
+
+ if (unlikely(t < 1 || t > 3600)) /* arbitrary upper limit */
return -EINVAL;
+ spin_lock_irqsave(&wdt_lock, flags);
heartbeat = t;
+ spin_unlock_irqrestore(&wdt_lock, flags);
return 0;
}
@@ -170,6 +187,9 @@ static int sh_wdt_set_heartbeat(int t)
*/
static void sh_wdt_ping(unsigned long data)
{
+ unsigned long flags;
+
+ spin_lock_irqsave(&wdt_lock, flags);
if (time_before(jiffies, next_heartbeat)) {
__u8 csr;
@@ -183,6 +203,7 @@ static void sh_wdt_ping(unsigned long data)
} else
printk(KERN_WARNING PFX "Heartbeat lost! Will not ping "
"the watchdog\n");
+ spin_unlock_irqrestore(&wdt_lock, flags);
}
/**
@@ -310,7 +331,6 @@ static int sh_wdt_mmap(struct file *file, struct vm_area_struct *vma)
/**
* sh_wdt_ioctl - Query Device
- * @inode: inode of device
* @file: file handle of device
* @cmd: watchdog command
* @arg: argument
@@ -318,53 +338,51 @@ static int sh_wdt_mmap(struct file *file, struct vm_area_struct *vma)
* Query basic information from the device or ping it, as outlined by the
* watchdog API.
*/
-static int sh_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long sh_wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int new_heartbeat;
int options, retval = -EINVAL;
switch (cmd) {
- case WDIOC_GETSUPPORT:
- return copy_to_user((struct watchdog_info *)arg,
- &sh_wdt_info,
- sizeof(sh_wdt_info)) ? -EFAULT : 0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, (int *)arg);
- case WDIOC_KEEPALIVE:
- sh_wdt_keepalive();
- return 0;
- case WDIOC_SETTIMEOUT:
- if (get_user(new_heartbeat, (int *)arg))
- return -EFAULT;
-
- if (sh_wdt_set_heartbeat(new_heartbeat))
- return -EINVAL;
-
- sh_wdt_keepalive();
- /* Fall */
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, (int *)arg);
- case WDIOC_SETOPTIONS:
- if (get_user(options, (int *)arg))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- sh_wdt_stop();
- retval = 0;
- }
+ case WDIOC_GETSUPPORT:
+ return copy_to_user((struct watchdog_info *)arg,
+ &sh_wdt_info, sizeof(sh_wdt_info)) ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, (int *)arg);
+ case WDIOC_KEEPALIVE:
+ sh_wdt_keepalive();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_heartbeat, (int *)arg))
+ return -EFAULT;
- if (options & WDIOS_ENABLECARD) {
- sh_wdt_start();
- retval = 0;
- }
+ if (sh_wdt_set_heartbeat(new_heartbeat))
+ return -EINVAL;
- return retval;
- default:
- return -ENOTTY;
- }
+ sh_wdt_keepalive();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(heartbeat, (int *)arg);
+ case WDIOC_SETOPTIONS:
+ if (get_user(options, (int *)arg))
+ return -EFAULT;
+
+ if (options & WDIOS_DISABLECARD) {
+ sh_wdt_stop();
+ retval = 0;
+ }
+
+ if (options & WDIOS_ENABLECARD) {
+ sh_wdt_start();
+ retval = 0;
+ }
+ return retval;
+ default:
+ return -ENOTTY;
+ }
return 0;
}
@@ -390,13 +408,13 @@ static const struct file_operations sh_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = sh_wdt_write,
- .ioctl = sh_wdt_ioctl,
+ .unlocked_ioctl = sh_wdt_ioctl,
.open = sh_wdt_open,
.release = sh_wdt_close,
.mmap = sh_wdt_mmap,
};
-static struct watchdog_info sh_wdt_info = {
+static const struct watchdog_info sh_wdt_info = {
.options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
WDIOF_MAGICCLOSE,
.firmware_version = 1,
@@ -422,30 +440,33 @@ static int __init sh_wdt_init(void)
{
int rc;
- if ((clock_division_ratio < 0x5) || (clock_division_ratio > 0x7)) {
+ if (clock_division_ratio < 0x5 || clock_division_ratio > 0x7) {
clock_division_ratio = WTCSR_CKS_4096;
- printk(KERN_INFO PFX "clock_division_ratio value must "
- "be 0x5<=x<=0x7, using %d\n", clock_division_ratio);
+ printk(KERN_INFO PFX
+ "clock_division_ratio value must be 0x5<=x<=0x7, using %d\n",
+ clock_division_ratio);
}
rc = sh_wdt_set_heartbeat(heartbeat);
if (unlikely(rc)) {
heartbeat = WATCHDOG_HEARTBEAT;
- printk(KERN_INFO PFX "heartbeat value must "
- "be 1<=x<=3600, using %d\n", heartbeat);
+ printk(KERN_INFO PFX
+ "heartbeat value must be 1<=x<=3600, using %d\n",
+ heartbeat);
}
rc = register_reboot_notifier(&sh_wdt_notifier);
if (unlikely(rc)) {
- printk(KERN_ERR PFX "Can't register reboot notifier (err=%d)\n",
- rc);
+ printk(KERN_ERR PFX
+ "Can't register reboot notifier (err=%d)\n", rc);
return rc;
}
rc = misc_register(&sh_wdt_miscdev);
if (unlikely(rc)) {
- printk(KERN_ERR PFX "Can't register miscdev on "
- "minor=%d (err=%d)\n", sh_wdt_miscdev.minor, rc);
+ printk(KERN_ERR PFX
+ "Can't register miscdev on minor=%d (err=%d)\n",
+ sh_wdt_miscdev.minor, rc);
unregister_reboot_notifier(&sh_wdt_notifier);
return rc;
}
@@ -476,10 +497,14 @@ module_param(clock_division_ratio, int, 0);
MODULE_PARM_DESC(clock_division_ratio, "Clock division ratio. Valid ranges are from 0x5 (1.31ms) to 0x7 (5.25ms). (default=" __MODULE_STRING(clock_division_ratio) ")");
module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (1<=heartbeat<=3600, default=" __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
+MODULE_PARM_DESC(heartbeat,
+ "Watchdog heartbeat in seconds. (1 <= heartbeat <= 3600, default="
+ __MODULE_STRING(WATCHDOG_HEARTBEAT) ")");
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
module_init(sh_wdt_init);
module_exit(sh_wdt_exit);
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 46/57] smsc37b787_wdt: coding style, switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (44 preceding siblings ...)
2008-05-19 13:08 ` [PATCH 45/57] shwdt: coding style, cleanup, " Alan Cox
@ 2008-05-19 13:09 ` Alan Cox
2008-05-19 13:09 ` [PATCH 47/57] softdog: clean up, coding style and " Alan Cox
` (11 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:09 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/smsc37b787_wdt.c | 442 +++++++++++++++++++------------------
1 files changed, 222 insertions(+), 220 deletions(-)
diff --git a/drivers/watchdog/smsc37b787_wdt.c b/drivers/watchdog/smsc37b787_wdt.c
index 5d2b5ba..b7c6394 100644
--- a/drivers/watchdog/smsc37b787_wdt.c
+++ b/drivers/watchdog/smsc37b787_wdt.c
@@ -18,7 +18,7 @@
* History:
* 2003 - Created version 1.0 for Linux 2.4.x.
* 2006 - Ported to Linux 2.6, added nowayout and MAGICCLOSE
- * features. Released version 1.1
+ * features. Released version 1.1
*
* Theory of operation:
*
@@ -55,9 +55,9 @@
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
/* enable support for minutes as units? */
@@ -71,15 +71,15 @@
#define UNIT_MINUTE 1
#define MODNAME "smsc37b787_wdt: "
-#define VERSION "1.1"
+#define VERSION "1.1"
-#define IOPORT 0x3F0
+#define IOPORT 0x3F0
#define IOPORT_SIZE 2
-#define IODEV_NO 8
+#define IODEV_NO 8
-static int unit = UNIT_SECOND; /* timer's unit */
-static int timeout = 60; /* timeout value: default is 60 "units" */
-static unsigned long timer_enabled = 0; /* is the timer enabled? */
+static int unit = UNIT_SECOND; /* timer's unit */
+static int timeout = 60; /* timeout value: default is 60 "units" */
+static unsigned long timer_enabled; /* is the timer enabled? */
static char expect_close; /* is the close expected? */
@@ -93,114 +93,121 @@ static int nowayout = WATCHDOG_NOWAYOUT;
static inline void open_io_config(void)
{
- outb(0x55, IOPORT);
+ outb(0x55, IOPORT);
mdelay(1);
- outb(0x55, IOPORT);
+ outb(0x55, IOPORT);
}
/* lock the IO chip */
static inline void close_io_config(void)
{
- outb(0xAA, IOPORT);
+ outb(0xAA, IOPORT);
}
/* select the IO device */
static inline void select_io_device(unsigned char devno)
{
- outb(0x07, IOPORT);
- outb(devno, IOPORT+1);
+ outb(0x07, IOPORT);
+ outb(devno, IOPORT+1);
}
/* write to the control register */
static inline void write_io_cr(unsigned char reg, unsigned char data)
{
- outb(reg, IOPORT);
- outb(data, IOPORT+1);
+ outb(reg, IOPORT);
+ outb(data, IOPORT+1);
}
/* read from the control register */
static inline char read_io_cr(unsigned char reg)
{
- outb(reg, IOPORT);
- return inb(IOPORT+1);
+ outb(reg, IOPORT);
+ return inb(IOPORT+1);
}
/* -- Medium level functions ------------------------------------*/
static inline void gpio_bit12(unsigned char reg)
{
- // -- General Purpose I/O Bit 1.2 --
- // Bit 0, In/Out: 0 = Output, 1 = Input
- // Bit 1, Polarity: 0 = No Invert, 1 = Invert
- // Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable
- // Bit 3/4, Function select: 00 = GPI/O, 01 = WDT, 10 = P17,
- // 11 = Either Edge Triggered Intr. 2
- // Bit 5/6 (Reserved)
- // Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain
- write_io_cr(0xE2, reg);
+ /* -- General Purpose I/O Bit 1.2 --
+ * Bit 0, In/Out: 0 = Output, 1 = Input
+ * Bit 1, Polarity: 0 = No Invert, 1 = Invert
+ * Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable
+ * Bit 3/4, Function select: 00 = GPI/O, 01 = WDT, 10 = P17,
+ * 11 = Either Edge Triggered Intr. 2
+ * Bit 5/6 (Reserved)
+ * Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain
+ */
+ write_io_cr(0xE2, reg);
}
static inline void gpio_bit13(unsigned char reg)
{
- // -- General Purpose I/O Bit 1.3 --
- // Bit 0, In/Out: 0 = Output, 1 = Input
- // Bit 1, Polarity: 0 = No Invert, 1 = Invert
- // Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable
- // Bit 3, Function select: 0 = GPI/O, 1 = LED
- // Bit 4-6 (Reserved)
- // Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain
- write_io_cr(0xE3, reg);
+ /* -- General Purpose I/O Bit 1.3 --
+ * Bit 0, In/Out: 0 = Output, 1 = Input
+ * Bit 1, Polarity: 0 = No Invert, 1 = Invert
+ * Bit 2, Group Enable Intr.: 0 = Disable, 1 = Enable
+ * Bit 3, Function select: 0 = GPI/O, 1 = LED
+ * Bit 4-6 (Reserved)
+ * Bit 7, Output Type: 0 = Push Pull Bit, 1 = Open Drain
+ */
+ write_io_cr(0xE3, reg);
}
static inline void wdt_timer_units(unsigned char new_units)
{
- // -- Watchdog timer units --
- // Bit 0-6 (Reserved)
- // Bit 7, WDT Time-out Value Units Select
- // (0 = Minutes, 1 = Seconds)
- write_io_cr(0xF1, new_units);
+ /* -- Watchdog timer units --
+ * Bit 0-6 (Reserved)
+ * Bit 7, WDT Time-out Value Units Select
+ * (0 = Minutes, 1 = Seconds)
+ */
+ write_io_cr(0xF1, new_units);
}
static inline void wdt_timeout_value(unsigned char new_timeout)
{
- // -- Watchdog Timer Time-out Value --
- // Bit 0-7 Binary coded units (0=Disabled, 1..255)
- write_io_cr(0xF2, new_timeout);
+ /* -- Watchdog Timer Time-out Value --
+ * Bit 0-7 Binary coded units (0=Disabled, 1..255)
+ */
+ write_io_cr(0xF2, new_timeout);
}
static inline void wdt_timer_conf(unsigned char conf)
{
- // -- Watchdog timer configuration --
- // Bit 0 Joystick enable: 0* = No Reset, 1 = Reset WDT upon Gameport I/O
- // Bit 1 Keyboard enable: 0* = No Reset, 1 = Reset WDT upon KBD Intr.
- // Bit 2 Mouse enable: 0* = No Reset, 1 = Reset WDT upon Mouse Intr.
- // Bit 3 Reset the timer
- // (Wrong in SMsC documentation? Given as: PowerLED Timout Enabled)
- // Bit 4-7 WDT Interrupt Mapping: (0000* = Disabled,
- // 0001=IRQ1, 0010=(Invalid), 0011=IRQ3 to 1111=IRQ15)
- write_io_cr(0xF3, conf);
+ /* -- Watchdog timer configuration --
+ * Bit 0 Joystick enable: 0* = No Reset, 1 = Reset WDT upon
+ * Gameport I/O
+ * Bit 1 Keyboard enable: 0* = No Reset, 1 = Reset WDT upon KBD Intr.
+ * Bit 2 Mouse enable: 0* = No Reset, 1 = Reset WDT upon Mouse Intr
+ * Bit 3 Reset the timer
+ * (Wrong in SMsC documentation? Given as: PowerLED Timout
+ * Enabled)
+ * Bit 4-7 WDT Interrupt Mapping: (0000* = Disabled,
+ * 0001=IRQ1, 0010=(Invalid), 0011=IRQ3 to 1111=IRQ15)
+ */
+ write_io_cr(0xF3, conf);
}
static inline void wdt_timer_ctrl(unsigned char reg)
{
- // -- Watchdog timer control --
- // Bit 0 Status Bit: 0 = Timer counting, 1 = Timeout occured
- // Bit 1 Power LED Toggle: 0 = Disable Toggle, 1 = Toggle at 1 Hz
- // Bit 2 Force Timeout: 1 = Forces WD timeout event (self-cleaning)
- // Bit 3 P20 Force Timeout enabled:
- // 0 = P20 activity does not generate the WD timeout event
- // 1 = P20 Allows rising edge of P20, from the keyboard
- // controller, to force the WD timeout event.
- // Bit 4 (Reserved)
- // -- Soft power management --
- // Bit 5 Stop Counter: 1 = Stop software power down counter
- // set via register 0xB8, (self-cleaning)
- // (Upon read: 0 = Counter running, 1 = Counter stopped)
- // Bit 6 Restart Counter: 1 = Restart software power down counter
- // set via register 0xB8, (self-cleaning)
- // Bit 7 SPOFF: 1 = Force software power down (self-cleaning)
-
- write_io_cr(0xF4, reg);
+ /* -- Watchdog timer control --
+ * Bit 0 Status Bit: 0 = Timer counting, 1 = Timeout occured
+ * Bit 1 Power LED Toggle: 0 = Disable Toggle, 1 = Toggle at 1 Hz
+ * Bit 2 Force Timeout: 1 = Forces WD timeout event (self-cleaning)
+ * Bit 3 P20 Force Timeout enabled:
+ * 0 = P20 activity does not generate the WD timeout event
+ * 1 = P20 Allows rising edge of P20, from the keyboard
+ * controller, to force the WD timeout event.
+ * Bit 4 (Reserved)
+ * -- Soft power management --
+ * Bit 5 Stop Counter: 1 = Stop software power down counter
+ * set via register 0xB8, (self-cleaning)
+ * (Upon read: 0 = Counter running, 1 = Counter stopped)
+ * Bit 6 Restart Counter: 1 = Restart software power down counter
+ * set via register 0xB8, (self-cleaning)
+ * Bit 7 SPOFF: 1 = Force software power down (self-cleaning)
+ */
+ write_io_cr(0xF4, reg);
}
/* -- Higher level functions ------------------------------------*/
@@ -209,33 +216,34 @@ static inline void wdt_timer_ctrl(unsigned char reg)
static void wb_smsc_wdt_initialize(void)
{
- unsigned char old;
+ unsigned char old;
spin_lock(&io_lock);
- open_io_config();
- select_io_device(IODEV_NO);
+ open_io_config();
+ select_io_device(IODEV_NO);
- // enable the watchdog
- gpio_bit13(0x08); // Select pin 80 = LED not GPIO
- gpio_bit12(0x0A); // Set pin 79 = WDT not GPIO/Output/Polarity=Invert
+ /* enable the watchdog */
+ gpio_bit13(0x08); /* Select pin 80 = LED not GPIO */
+ gpio_bit12(0x0A); /* Set pin 79 = WDT not
+ GPIO/Output/Polarity=Invert */
+ /* disable the timeout */
+ wdt_timeout_value(0);
- // disable the timeout
- wdt_timeout_value(0);
+ /* reset control register */
+ wdt_timer_ctrl(0x00);
- // reset control register
- wdt_timer_ctrl(0x00);
-
- // reset configuration register
+ /* reset configuration register */
wdt_timer_conf(0x00);
- // read old (timer units) register
- old = read_io_cr(0xF1) & 0x7F;
- if (unit == UNIT_SECOND) old |= 0x80; // set to seconds
+ /* read old (timer units) register */
+ old = read_io_cr(0xF1) & 0x7F;
+ if (unit == UNIT_SECOND)
+ old |= 0x80; /* set to seconds */
- // set the watchdog timer units
- wdt_timer_units(old);
+ /* set the watchdog timer units */
+ wdt_timer_units(old);
- close_io_config();
+ close_io_config();
spin_unlock(&io_lock);
}
@@ -244,23 +252,23 @@ static void wb_smsc_wdt_initialize(void)
static void wb_smsc_wdt_shutdown(void)
{
spin_lock(&io_lock);
- open_io_config();
- select_io_device(IODEV_NO);
+ open_io_config();
+ select_io_device(IODEV_NO);
- // disable the watchdog
- gpio_bit13(0x09);
- gpio_bit12(0x09);
+ /* disable the watchdog */
+ gpio_bit13(0x09);
+ gpio_bit12(0x09);
- // reset watchdog config register
+ /* reset watchdog config register */
wdt_timer_conf(0x00);
- // reset watchdog control register
- wdt_timer_ctrl(0x00);
+ /* reset watchdog control register */
+ wdt_timer_ctrl(0x00);
- // disable timeout
- wdt_timeout_value(0x00);
+ /* disable timeout */
+ wdt_timeout_value(0x00);
- close_io_config();
+ close_io_config();
spin_unlock(&io_lock);
}
@@ -269,16 +277,16 @@ static void wb_smsc_wdt_shutdown(void)
static void wb_smsc_wdt_set_timeout(unsigned char new_timeout)
{
spin_lock(&io_lock);
- open_io_config();
- select_io_device(IODEV_NO);
+ open_io_config();
+ select_io_device(IODEV_NO);
- // set Power LED to blink, if we enable the timeout
- wdt_timer_ctrl((new_timeout == 0) ? 0x00 : 0x02);
+ /* set Power LED to blink, if we enable the timeout */
+ wdt_timer_ctrl((new_timeout == 0) ? 0x00 : 0x02);
- // set timeout value
- wdt_timeout_value(new_timeout);
+ /* set timeout value */
+ wdt_timeout_value(new_timeout);
- close_io_config();
+ close_io_config();
spin_unlock(&io_lock);
}
@@ -286,32 +294,32 @@ static void wb_smsc_wdt_set_timeout(unsigned char new_timeout)
static unsigned char wb_smsc_wdt_get_timeout(void)
{
- unsigned char set_timeout;
+ unsigned char set_timeout;
spin_lock(&io_lock);
- open_io_config();
- select_io_device(IODEV_NO);
- set_timeout = read_io_cr(0xF2);
- close_io_config();
+ open_io_config();
+ select_io_device(IODEV_NO);
+ set_timeout = read_io_cr(0xF2);
+ close_io_config();
spin_unlock(&io_lock);
- return set_timeout;
+ return set_timeout;
}
/* disable watchdog */
static void wb_smsc_wdt_disable(void)
{
- // set the timeout to 0 to disable the watchdog
- wb_smsc_wdt_set_timeout(0);
+ /* set the timeout to 0 to disable the watchdog */
+ wb_smsc_wdt_set_timeout(0);
}
/* enable watchdog by setting the current timeout */
static void wb_smsc_wdt_enable(void)
{
- // set the current timeout...
- wb_smsc_wdt_set_timeout(timeout);
+ /* set the current timeout... */
+ wb_smsc_wdt_set_timeout(timeout);
}
/* reset the timer */
@@ -319,14 +327,14 @@ static void wb_smsc_wdt_enable(void)
static void wb_smsc_wdt_reset_timer(void)
{
spin_lock(&io_lock);
- open_io_config();
- select_io_device(IODEV_NO);
+ open_io_config();
+ select_io_device(IODEV_NO);
- // reset the timer
+ /* reset the timer */
wdt_timeout_value(timeout);
wdt_timer_conf(0x08);
- close_io_config();
+ close_io_config();
spin_unlock(&io_lock);
}
@@ -355,7 +363,9 @@ static int wb_smsc_wdt_open(struct inode *inode, struct file *file)
/* Reload and activate timer */
wb_smsc_wdt_enable();
- printk(KERN_INFO MODNAME "Watchdog enabled. Timeout set to %d %s.\n", timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)");
+ printk(KERN_INFO MODNAME
+ "Watchdog enabled. Timeout set to %d %s.\n",
+ timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)");
return nonseekable_open(inode, file);
}
@@ -367,10 +377,12 @@ static int wb_smsc_wdt_release(struct inode *inode, struct file *file)
/* Shut off the timer. */
if (expect_close == 42) {
- wb_smsc_wdt_disable();
- printk(KERN_INFO MODNAME "Watchdog disabled, sleeping again...\n");
+ wb_smsc_wdt_disable();
+ printk(KERN_INFO MODNAME
+ "Watchdog disabled, sleeping again...\n");
} else {
- printk(KERN_CRIT MODNAME "Unexpected close, not stopping watchdog!\n");
+ printk(KERN_CRIT MODNAME
+ "Unexpected close, not stopping watchdog!\n");
wb_smsc_wdt_reset_timer();
}
@@ -392,7 +404,8 @@ static ssize_t wb_smsc_wdt_write(struct file *file, const char __user *data,
/* reset expect flag */
expect_close = 0;
- /* scan to see whether or not we got the magic character */
+ /* scan to see whether or not we got the
+ magic character */
for (i = 0; i != len; i++) {
char c;
if (get_user(c, data+i))
@@ -410,8 +423,8 @@ static ssize_t wb_smsc_wdt_write(struct file *file, const char __user *data,
/* ioctl => control interface */
-static int wb_smsc_wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long wb_smsc_wdt_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
{
int new_timeout;
@@ -420,9 +433,9 @@ static int wb_smsc_wdt_ioctl(struct inode *inode, struct file *file,
int __user *i;
} uarg;
- static struct watchdog_info ident = {
+ static const struct watchdog_info ident = {
.options = WDIOF_KEEPALIVEPING |
- WDIOF_SETTIMEOUT |
+ WDIOF_SETTIMEOUT |
WDIOF_MAGICCLOSE,
.firmware_version = 0,
.identity = "SMsC 37B787 Watchdog"
@@ -431,78 +444,62 @@ static int wb_smsc_wdt_ioctl(struct inode *inode, struct file *file,
uarg.i = (int __user *)arg;
switch (cmd) {
- default:
- return -ENOTTY;
-
- case WDIOC_GETSUPPORT:
- return copy_to_user(uarg.ident, &ident,
- sizeof(ident)) ? -EFAULT : 0;
-
- case WDIOC_GETSTATUS:
- return put_user(wb_smsc_wdt_status(), uarg.i);
-
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, uarg.i);
-
- case WDIOC_KEEPALIVE:
- wb_smsc_wdt_reset_timer();
- return 0;
-
- case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, uarg.i))
- return -EFAULT;
-
- // the API states this is given in secs
- if (unit == UNIT_MINUTE)
- new_timeout /= 60;
-
- if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
- return -EINVAL;
-
- timeout = new_timeout;
- wb_smsc_wdt_set_timeout(timeout);
-
- // fall through and return the new timeout...
-
- case WDIOC_GETTIMEOUT:
-
- new_timeout = timeout;
-
- if (unit == UNIT_MINUTE)
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(uarg.ident, &ident, sizeof(ident))
+ ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ return put_user(wb_smsc_wdt_status(), uarg.i);
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, uarg.i);
+ case WDIOC_KEEPALIVE:
+ wb_smsc_wdt_reset_timer();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_timeout, uarg.i))
+ return -EFAULT;
+ /* the API states this is given in secs */
+ if (unit == UNIT_MINUTE)
+ new_timeout /= 60;
+ if (new_timeout < 0 || new_timeout > MAX_TIMEOUT)
+ return -EINVAL;
+ timeout = new_timeout;
+ wb_smsc_wdt_set_timeout(timeout);
+ /* fall through and return the new timeout... */
+ case WDIOC_GETTIMEOUT:
+ new_timeout = timeout;
+ if (unit == UNIT_MINUTE)
new_timeout *= 60;
+ return put_user(new_timeout, uarg.i);
+ case WDIOC_SETOPTIONS:
+ {
+ int options, retval = -EINVAL;
- return put_user(new_timeout, uarg.i);
-
- case WDIOC_SETOPTIONS:
- {
- int options, retval = -EINVAL;
-
- if (get_user(options, uarg.i))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- wb_smsc_wdt_disable();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- wb_smsc_wdt_enable();
- retval = 0;
- }
+ if (get_user(options, uarg.i))
+ return -EFAULT;
- return retval;
+ if (options & WDIOS_DISABLECARD) {
+ wb_smsc_wdt_disable();
+ retval = 0;
}
+ if (options & WDIOS_ENABLECARD) {
+ wb_smsc_wdt_enable();
+ retval = 0;
+ }
+ return retval;
+ }
+ default:
+ return -ENOTTY;
}
}
/* -- Notifier funtions -----------------------------------------*/
-static int wb_smsc_wdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
+static int wb_smsc_wdt_notify_sys(struct notifier_block *this,
+ unsigned long code, void *unused)
{
- if (code == SYS_DOWN || code == SYS_HALT)
- {
- // set timeout to 0, to avoid possible race-condition
- timeout = 0;
+ if (code == SYS_DOWN || code == SYS_HALT) {
+ /* set timeout to 0, to avoid possible race-condition */
+ timeout = 0;
wb_smsc_wdt_disable();
}
return NOTIFY_DONE;
@@ -510,23 +507,20 @@ static int wb_smsc_wdt_notify_sys(struct notifier_block *this, unsigned long cod
/* -- Module's structures ---------------------------------------*/
-static const struct file_operations wb_smsc_wdt_fops =
-{
- .owner = THIS_MODULE,
+static const struct file_operations wb_smsc_wdt_fops = {
+ .owner = THIS_MODULE,
.llseek = no_llseek,
.write = wb_smsc_wdt_write,
- .ioctl = wb_smsc_wdt_ioctl,
+ .unlocked_ioctl = wb_smsc_wdt_ioctl,
.open = wb_smsc_wdt_open,
.release = wb_smsc_wdt_release,
};
-static struct notifier_block wb_smsc_wdt_notifier =
-{
+static struct notifier_block wb_smsc_wdt_notifier = {
.notifier_call = wb_smsc_wdt_notify_sys,
};
-static struct miscdevice wb_smsc_wdt_miscdev =
-{
+static struct miscdevice wb_smsc_wdt_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &wb_smsc_wdt_fops,
@@ -540,39 +534,44 @@ static int __init wb_smsc_wdt_init(void)
{
int ret;
- printk("SMsC 37B787 watchdog component driver " VERSION " initialising...\n");
+ printk(KERN_INFO "SMsC 37B787 watchdog component driver "
+ VERSION " initialising...\n");
if (!request_region(IOPORT, IOPORT_SIZE, "SMsC 37B787 watchdog")) {
- printk(KERN_ERR MODNAME "Unable to register IO port %#x\n", IOPORT);
+ printk(KERN_ERR MODNAME "Unable to register IO port %#x\n",
+ IOPORT);
ret = -EBUSY;
goto out_pnp;
}
- // set new maximum, if it's too big
- if (timeout > MAX_TIMEOUT)
- timeout = MAX_TIMEOUT;
+ /* set new maximum, if it's too big */
+ if (timeout > MAX_TIMEOUT)
+ timeout = MAX_TIMEOUT;
- // init the watchdog timer
- wb_smsc_wdt_initialize();
+ /* init the watchdog timer */
+ wb_smsc_wdt_initialize();
ret = register_reboot_notifier(&wb_smsc_wdt_notifier);
if (ret) {
- printk(KERN_ERR MODNAME "Unable to register reboot notifier err = %d\n", ret);
+ printk(KERN_ERR MODNAME
+ "Unable to register reboot notifier err = %d\n", ret);
goto out_io;
}
ret = misc_register(&wb_smsc_wdt_miscdev);
if (ret) {
- printk(KERN_ERR MODNAME "Unable to register miscdev on minor %d\n", WATCHDOG_MINOR);
+ printk(KERN_ERR MODNAME
+ "Unable to register miscdev on minor %d\n",
+ WATCHDOG_MINOR);
goto out_rbt;
}
- // output info
- printk(KERN_INFO MODNAME "Timeout set to %d %s.\n", timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)");
- printk(KERN_INFO MODNAME "Watchdog initialized and sleeping (nowayout=%d)...\n", nowayout);
-
- // ret = 0
-
+ /* output info */
+ printk(KERN_INFO MODNAME "Timeout set to %d %s.\n",
+ timeout, (unit == UNIT_SECOND) ? "second(s)" : "minute(s)");
+ printk(KERN_INFO MODNAME
+ "Watchdog initialized and sleeping (nowayout=%d)...\n",
+ nowayout);
out_clean:
return ret;
@@ -591,8 +590,7 @@ out_pnp:
static void __exit wb_smsc_wdt_exit(void)
{
/* Stop the timer before we leave */
- if (!nowayout)
- {
+ if (!nowayout) {
wb_smsc_wdt_shutdown();
printk(KERN_INFO MODNAME "Watchdog disabled.\n");
}
@@ -601,25 +599,29 @@ static void __exit wb_smsc_wdt_exit(void)
unregister_reboot_notifier(&wb_smsc_wdt_notifier);
release_region(IOPORT, IOPORT_SIZE);
- printk("SMsC 37B787 watchdog component driver removed.\n");
+ printk(KERN_INFO "SMsC 37B787 watchdog component driver removed.\n");
}
module_init(wb_smsc_wdt_init);
module_exit(wb_smsc_wdt_exit);
MODULE_AUTHOR("Sven Anders <anders@anduras.de>");
-MODULE_DESCRIPTION("Driver for SMsC 37B787 watchdog component (Version " VERSION ")");
+MODULE_DESCRIPTION("Driver for SMsC 37B787 watchdog component (Version "
+ VERSION ")");
MODULE_LICENSE("GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
#ifdef SMSC_SUPPORT_MINUTES
module_param(unit, int, 0);
-MODULE_PARM_DESC(unit, "set unit to use, 0=seconds or 1=minutes, default is 0");
+MODULE_PARM_DESC(unit,
+ "set unit to use, 0=seconds or 1=minutes, default is 0");
#endif
module_param(timeout, int, 0);
MODULE_PARM_DESC(timeout, "range is 1-255 units, default is 60");
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 47/57] softdog: clean up, coding style and switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (45 preceding siblings ...)
2008-05-19 13:09 ` [PATCH 46/57] smsc37b787_wdt: coding style, " Alan Cox
@ 2008-05-19 13:09 ` Alan Cox
2008-05-19 13:09 ` [PATCH 48/57] txx9: Fix locking, " Alan Cox
` (10 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:09 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/softdog.c | 87 +++++++++++++++++++++++---------------------
1 files changed, 46 insertions(+), 41 deletions(-)
diff --git a/drivers/watchdog/softdog.c b/drivers/watchdog/softdog.c
index 9c36949..bb3c75e 100644
--- a/drivers/watchdog/softdog.c
+++ b/drivers/watchdog/softdog.c
@@ -47,19 +47,22 @@
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/jiffies.h>
-
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#define PFX "SoftDog: "
#define TIMER_MARGIN 60 /* Default is 60 seconds */
static int soft_margin = TIMER_MARGIN; /* in seconds */
module_param(soft_margin, int, 0);
-MODULE_PARM_DESC(soft_margin, "Watchdog soft_margin in seconds. (0<soft_margin<65536, default=" __MODULE_STRING(TIMER_MARGIN) ")");
+MODULE_PARM_DESC(soft_margin,
+ "Watchdog soft_margin in seconds. (0 < soft_margin < 65536, default="
+ __MODULE_STRING(TIMER_MARGIN) ")");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
#ifdef ONLY_TESTING
static int soft_noboot = 1;
@@ -93,8 +96,7 @@ static void watchdog_fire(unsigned long data)
if (soft_noboot)
printk(KERN_CRIT PFX "Triggered - Reboot ignored.\n");
- else
- {
+ else {
printk(KERN_CRIT PFX "Initiating system reboot.\n");
emergency_restart();
printk(KERN_CRIT PFX "Reboot didn't ?????\n");
@@ -153,7 +155,8 @@ static int softdog_release(struct inode *inode, struct file *file)
softdog_stop();
module_put(THIS_MODULE);
} else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ printk(KERN_CRIT PFX
+ "Unexpected close, not stopping watchdog!\n");
set_bit(0, &orphan_timer);
softdog_keepalive();
}
@@ -162,12 +165,13 @@ static int softdog_release(struct inode *inode, struct file *file)
return 0;
}
-static ssize_t softdog_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
+static ssize_t softdog_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos)
{
/*
* Refresh the timer.
*/
- if(len) {
+ if (len) {
if (!nowayout) {
size_t i;
@@ -188,13 +192,13 @@ static ssize_t softdog_write(struct file *file, const char __user *data, size_t
return len;
}
-static int softdog_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long softdog_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
int new_margin;
- static struct watchdog_info ident = {
+ static const struct watchdog_info ident = {
.options = WDIOF_SETTIMEOUT |
WDIOF_KEEPALIVEPING |
WDIOF_MAGICCLOSE,
@@ -202,26 +206,25 @@ static int softdog_ioctl(struct inode *inode, struct file *file,
.identity = "Software Watchdog",
};
switch (cmd) {
- default:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident,
- sizeof(ident)) ? -EFAULT : 0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- softdog_keepalive();
- return 0;
- case WDIOC_SETTIMEOUT:
- if (get_user(new_margin, p))
- return -EFAULT;
- if (softdog_set_heartbeat(new_margin))
- return -EINVAL;
- softdog_keepalive();
- /* Fall */
- case WDIOC_GETTIMEOUT:
- return put_user(soft_margin, p);
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ softdog_keepalive();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_margin, p))
+ return -EFAULT;
+ if (softdog_set_heartbeat(new_margin))
+ return -EINVAL;
+ softdog_keepalive();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(soft_margin, p);
}
}
@@ -232,10 +235,9 @@ static int softdog_ioctl(struct inode *inode, struct file *file,
static int softdog_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
- if(code==SYS_DOWN || code==SYS_HALT) {
+ if (code == SYS_DOWN || code == SYS_HALT)
/* Turn the WDT off */
softdog_stop();
- }
return NOTIFY_DONE;
}
@@ -247,7 +249,7 @@ static const struct file_operations softdog_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = softdog_write,
- .ioctl = softdog_ioctl,
+ .unlocked_ioctl = softdog_ioctl,
.open = softdog_open,
.release = softdog_release,
};
@@ -268,24 +270,27 @@ static int __init watchdog_init(void)
{
int ret;
- /* Check that the soft_margin value is within it's range ; if not reset to the default */
+ /* Check that the soft_margin value is within it's range;
+ if not reset to the default */
if (softdog_set_heartbeat(soft_margin)) {
softdog_set_heartbeat(TIMER_MARGIN);
- printk(KERN_INFO PFX "soft_margin value must be 0<soft_margin<65536, using %d\n",
+ printk(KERN_INFO PFX
+ "soft_margin must be 0 < soft_margin < 65536, using %d\n",
TIMER_MARGIN);
}
ret = register_reboot_notifier(&softdog_notifier);
if (ret) {
- printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", ret);
return ret;
}
ret = misc_register(&softdog_miscdev);
if (ret) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
unregister_reboot_notifier(&softdog_notifier);
return ret;
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 48/57] txx9: Fix locking, switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (46 preceding siblings ...)
2008-05-19 13:09 ` [PATCH 47/57] softdog: clean up, coding style and " Alan Cox
@ 2008-05-19 13:09 ` Alan Cox
2008-05-19 13:09 ` [PATCH 49/57] w83627hf: coding style, clean up and " Alan Cox
` (9 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:09 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/txx9wdt.c | 31 +++++++++++++++++++------------
1 files changed, 19 insertions(+), 12 deletions(-)
diff --git a/drivers/watchdog/txx9wdt.c b/drivers/watchdog/txx9wdt.c
index 57cefef..b729cc4 100644
--- a/drivers/watchdog/txx9wdt.c
+++ b/drivers/watchdog/txx9wdt.c
@@ -45,27 +45,34 @@ static unsigned long txx9wdt_alive;
static int expect_close;
static struct txx9_tmr_reg __iomem *txx9wdt_reg;
static struct clk *txx9_imclk;
+static DECLARE_LOCK(txx9_lock);
static void txx9wdt_ping(void)
{
+ spin_lock(&txx9_lock);
__raw_writel(TXx9_TMWTMR_TWIE | TXx9_TMWTMR_TWC, &txx9wdt_reg->wtmr);
+ spin_unlock(&txx9_lock);
}
static void txx9wdt_start(void)
{
+ spin_lock(&txx9_lock);
__raw_writel(WD_TIMER_CLK * timeout, &txx9wdt_reg->cpra);
__raw_writel(WD_TIMER_CCD, &txx9wdt_reg->ccdr);
__raw_writel(0, &txx9wdt_reg->tisr); /* clear pending interrupt */
__raw_writel(TXx9_TMTCR_TCE | TXx9_TMTCR_CCDE | TXx9_TMTCR_TMODE_WDOG,
&txx9wdt_reg->tcr);
__raw_writel(TXx9_TMWTMR_TWIE | TXx9_TMWTMR_TWC, &txx9wdt_reg->wtmr);
+ spin_unlock(&txx9_lock);
}
static void txx9wdt_stop(void)
{
+ spin_lock(&txx9_lock);
__raw_writel(TXx9_TMWTMR_WDIS, &txx9wdt_reg->wtmr);
__raw_writel(__raw_readl(&txx9wdt_reg->tcr) & ~TXx9_TMTCR_TCE,
&txx9wdt_reg->tcr);
+ spin_unlock(&txx9_lock);
}
static int txx9wdt_open(struct inode *inode, struct file *file)
@@ -120,13 +127,13 @@ static ssize_t txx9wdt_write(struct file *file, const char __user *data,
return len;
}
-static int txx9wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long txx9wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
int new_timeout;
- static struct watchdog_info ident = {
+ static const struct watchdog_info ident = {
.options = WDIOF_SETTIMEOUT |
WDIOF_KEEPALIVEPING |
WDIOF_MAGICCLOSE,
@@ -168,18 +175,18 @@ static int txx9wdt_notify_sys(struct notifier_block *this, unsigned long code,
}
static const struct file_operations txx9wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = txx9wdt_write,
- .ioctl = txx9wdt_ioctl,
- .open = txx9wdt_open,
- .release = txx9wdt_release,
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = txx9wdt_write,
+ .unlocked_ioctl = txx9wdt_ioctl,
+ .open = txx9wdt_open,
+ .release = txx9wdt_release,
};
static struct miscdevice txx9wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &txx9wdt_fops,
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &txx9wdt_fops,
};
static struct notifier_block txx9wdt_notifier = {
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 49/57] w83627hf: coding style, clean up and switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (47 preceding siblings ...)
2008-05-19 13:09 ` [PATCH 48/57] txx9: Fix locking, " Alan Cox
@ 2008-05-19 13:09 ` Alan Cox
2008-05-19 13:09 ` [PATCH 50/57] w83697hf_wdt: cleanup, coding style " Alan Cox
` (8 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:09 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/w83627hf_wdt.c | 175 ++++++++++++++++++---------------------
1 files changed, 83 insertions(+), 92 deletions(-)
diff --git a/drivers/watchdog/w83627hf_wdt.c b/drivers/watchdog/w83627hf_wdt.c
index 3864928..70c843f 100644
--- a/drivers/watchdog/w83627hf_wdt.c
+++ b/drivers/watchdog/w83627hf_wdt.c
@@ -37,9 +37,9 @@
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
#define WATCHDOG_NAME "w83627hf/thf/hg WDT"
@@ -57,22 +57,26 @@ MODULE_PARM_DESC(wdt_io, "w83627hf/thf WDT io port (default 0x2E)");
static int timeout = WATCHDOG_TIMEOUT; /* in seconds */
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds. 1 <= timeout <= 255, default="
+ __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* Kernel methods.
*/
#define WDT_EFER (wdt_io+0) /* Extended Function Enable Registers */
-#define WDT_EFIR (wdt_io+0) /* Extended Function Index Register (same as EFER) */
+#define WDT_EFIR (wdt_io+0) /* Extended Function Index Register
+ (same as EFER) */
#define WDT_EFDR (WDT_EFIR+1) /* Extended Function Data Register */
-static void
-w83627hf_select_wd_register(void)
+static void w83627hf_select_wd_register(void)
{
unsigned char c;
outb_p(0x87, WDT_EFER); /* Enter extended function mode */
@@ -93,43 +97,45 @@ w83627hf_select_wd_register(void)
outb_p(0x01, WDT_EFDR); /* set bit 0 to activate GPIO2 */
}
-static void
-w83627hf_unselect_wd_register(void)
+static void w83627hf_unselect_wd_register(void)
{
outb_p(0xAA, WDT_EFER); /* Leave extended function mode */
}
/* tyan motherboards seem to set F5 to 0x4C ?
* So explicitly init to appropriate value. */
-static void
-w83627hf_init(void)
+
+static void w83627hf_init(void)
{
unsigned char t;
w83627hf_select_wd_register();
outb_p(0xF6, WDT_EFER); /* Select CRF6 */
- t=inb_p(WDT_EFDR); /* read CRF6 */
+ t = inb_p(WDT_EFDR); /* read CRF6 */
if (t != 0) {
- printk (KERN_INFO PFX "Watchdog already running. Resetting timeout to %d sec\n", timeout);
+ printk(KERN_INFO PFX
+ "Watchdog already running. Resetting timeout to %d sec\n",
+ timeout);
outb_p(timeout, WDT_EFDR); /* Write back to CRF6 */
}
outb_p(0xF5, WDT_EFER); /* Select CRF5 */
- t=inb_p(WDT_EFDR); /* read CRF5 */
- t&=~0x0C; /* set second mode & disable keyboard turning off watchdog */
+ t = inb_p(WDT_EFDR); /* read CRF5 */
+ t &= ~0x0C; /* set second mode & disable keyboard
+ turning off watchdog */
outb_p(t, WDT_EFDR); /* Write back to CRF5 */
outb_p(0xF7, WDT_EFER); /* Select CRF7 */
- t=inb_p(WDT_EFDR); /* read CRF7 */
- t&=~0xC0; /* disable keyboard & mouse turning off watchdog */
+ t = inb_p(WDT_EFDR); /* read CRF7 */
+ t &= ~0xC0; /* disable keyboard & mouse turning off
+ watchdog */
outb_p(t, WDT_EFDR); /* Write back to CRF7 */
w83627hf_unselect_wd_register();
}
-static void
-wdt_ctrl(int timeout)
+static void wdt_ctrl(int timeout)
{
spin_lock(&io_lock);
@@ -143,32 +149,28 @@ wdt_ctrl(int timeout)
spin_unlock(&io_lock);
}
-static int
-wdt_ping(void)
+static int wdt_ping(void)
{
wdt_ctrl(timeout);
return 0;
}
-static int
-wdt_disable(void)
+static int wdt_disable(void)
{
wdt_ctrl(0);
return 0;
}
-static int
-wdt_set_heartbeat(int t)
+static int wdt_set_heartbeat(int t)
{
- if ((t < 1) || (t > 255))
+ if (t < 1 || t > 255)
return -EINVAL;
-
timeout = t;
return 0;
}
-static ssize_t
-wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+static ssize_t wdt_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
if (count) {
if (!nowayout) {
@@ -189,72 +191,61 @@ wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
return count;
}
-static int
-wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
int new_timeout;
static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE,
.firmware_version = 1,
.identity = "W83627HF WDT",
};
switch (cmd) {
case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof(ident)))
- return -EFAULT;
- break;
-
+ if (copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ break;
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
-
+ return put_user(0, p);
case WDIOC_KEEPALIVE:
- wdt_ping();
- break;
-
+ wdt_ping();
+ break;
case WDIOC_SETTIMEOUT:
- if (get_user(new_timeout, p))
- return -EFAULT;
- if (wdt_set_heartbeat(new_timeout))
- return -EINVAL;
- wdt_ping();
- /* Fall */
-
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+ if (wdt_set_heartbeat(new_timeout))
+ return -EINVAL;
+ wdt_ping();
+ /* Fall */
case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
-
+ return put_user(timeout, p);
case WDIOC_SETOPTIONS:
{
- int options, retval = -EINVAL;
-
- if (get_user(options, p))
- return -EFAULT;
-
- if (options & WDIOS_DISABLECARD) {
- wdt_disable();
- retval = 0;
- }
-
- if (options & WDIOS_ENABLECARD) {
- wdt_ping();
- retval = 0;
- }
+ int options, retval = -EINVAL;
- return retval;
+ if (get_user(options, p))
+ return -EFAULT;
+ if (options & WDIOS_DISABLECARD) {
+ wdt_disable();
+ retval = 0;
+ }
+ if (options & WDIOS_ENABLECARD) {
+ wdt_ping();
+ retval = 0;
+ }
+ return retval;
}
-
default:
- return -ENOTTY;
+ return -ENOTTY;
}
return 0;
}
-static int
-wdt_open(struct inode *inode, struct file *file)
+static int wdt_open(struct inode *inode, struct file *file)
{
if (test_and_set_bit(0, &wdt_is_open))
return -EBUSY;
@@ -266,13 +257,13 @@ wdt_open(struct inode *inode, struct file *file)
return nonseekable_open(inode, file);
}
-static int
-wdt_close(struct inode *inode, struct file *file)
+static int wdt_close(struct inode *inode, struct file *file)
{
- if (expect_close == 42) {
+ if (expect_close == 42)
wdt_disable();
- } else {
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ else {
+ printk(KERN_CRIT PFX
+ "Unexpected close, not stopping watchdog!\n");
wdt_ping();
}
expect_close = 0;
@@ -284,8 +275,7 @@ wdt_close(struct inode *inode, struct file *file)
* Notifier for system down
*/
-static int
-wdt_notify_sys(struct notifier_block *this, unsigned long code,
+static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
if (code == SYS_DOWN || code == SYS_HALT) {
@@ -303,7 +293,7 @@ static const struct file_operations wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = wdt_write,
- .ioctl = wdt_ioctl,
+ .unlocked_ioctl = wdt_ioctl,
.open = wdt_open,
.release = wdt_close,
};
@@ -323,8 +313,7 @@ static struct notifier_block wdt_notifier = {
.notifier_call = wdt_notify_sys,
};
-static int __init
-wdt_init(void)
+static int __init wdt_init(void)
{
int ret;
@@ -332,12 +321,13 @@ wdt_init(void)
if (wdt_set_heartbeat(timeout)) {
wdt_set_heartbeat(WATCHDOG_TIMEOUT);
- printk (KERN_INFO PFX "timeout value must be 1<=timeout<=255, using %d\n",
- WATCHDOG_TIMEOUT);
+ printk(KERN_INFO PFX
+ "timeout value must be 1 <= timeout <= 255, using %d\n",
+ WATCHDOG_TIMEOUT);
}
if (!request_region(wdt_io, 1, WATCHDOG_NAME)) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
wdt_io);
ret = -EIO;
goto out;
@@ -347,20 +337,22 @@ wdt_init(void)
ret = register_reboot_notifier(&wdt_notifier);
if (ret != 0) {
- printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", ret);
goto unreg_regions;
}
ret = misc_register(&wdt_miscdev);
if (ret != 0) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
goto unreg_reboot;
}
- printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
- timeout, nowayout);
+ printk(KERN_INFO PFX
+ "initialized. timeout=%d sec (nowayout=%d)\n",
+ timeout, nowayout);
out:
return ret;
@@ -371,12 +363,11 @@ unreg_regions:
goto out;
}
-static void __exit
-wdt_exit(void)
+static void __exit wdt_exit(void)
{
misc_deregister(&wdt_miscdev);
unregister_reboot_notifier(&wdt_notifier);
- release_region(wdt_io,1);
+ release_region(wdt_io, 1);
}
module_init(wdt_init);
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 50/57] w83697hf_wdt: cleanup, coding style and switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (48 preceding siblings ...)
2008-05-19 13:09 ` [PATCH 49/57] w83627hf: coding style, clean up and " Alan Cox
@ 2008-05-19 13:09 ` Alan Cox
2008-05-19 13:09 ` [PATCH 51/57] w83877f_wdt: clean up code, coding style, " Alan Cox
` (7 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:09 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/w83697hf_wdt.c | 141 +++++++++++++++++++--------------------
1 files changed, 69 insertions(+), 72 deletions(-)
diff --git a/drivers/watchdog/w83697hf_wdt.c b/drivers/watchdog/w83697hf_wdt.c
index c622a0e..cb14644 100644
--- a/drivers/watchdog/w83697hf_wdt.c
+++ b/drivers/watchdog/w83697hf_wdt.c
@@ -36,9 +36,9 @@
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/spinlock.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
#define WATCHDOG_NAME "w83697hf/hg WDT"
@@ -52,33 +52,37 @@ static DEFINE_SPINLOCK(io_lock);
/* You must set this - there is no sane way to probe for this board. */
static int wdt_io = 0x2e;
module_param(wdt_io, int, 0);
-MODULE_PARM_DESC(wdt_io, "w83697hf/hg WDT io port (default 0x2e, 0 = autodetect)");
+MODULE_PARM_DESC(wdt_io,
+ "w83697hf/hg WDT io port (default 0x2e, 0 = autodetect)");
static int timeout = WATCHDOG_TIMEOUT; /* in seconds */
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds. 1<= timeout <=255, default="
+ __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* Kernel methods.
*/
-#define W83697HF_EFER (wdt_io+0) /* Extended Function Enable Register */
-#define W83697HF_EFIR (wdt_io+0) /* Extended Function Index Register (same as EFER) */
-#define W83697HF_EFDR (wdt_io+1) /* Extended Function Data Register */
+#define W83697HF_EFER (wdt_io + 0) /* Extended Function Enable Register */
+#define W83697HF_EFIR (wdt_io + 0) /* Extended Function Index Register
+ (same as EFER) */
+#define W83697HF_EFDR (wdt_io + 1) /* Extended Function Data Register */
-static inline void
-w83697hf_unlock(void)
+static inline void w83697hf_unlock(void)
{
outb_p(0x87, W83697HF_EFER); /* Enter extended function mode */
outb_p(0x87, W83697HF_EFER); /* Again according to manual */
}
-static inline void
-w83697hf_lock(void)
+static inline void w83697hf_lock(void)
{
outb_p(0xAA, W83697HF_EFER); /* Leave extended function mode */
}
@@ -88,41 +92,36 @@ w83697hf_lock(void)
* w83697hf_write_timeout() must be called with the device unlocked.
*/
-static unsigned char
-w83697hf_get_reg(unsigned char reg)
+static unsigned char w83697hf_get_reg(unsigned char reg)
{
outb_p(reg, W83697HF_EFIR);
return inb_p(W83697HF_EFDR);
}
-static void
-w83697hf_set_reg(unsigned char reg, unsigned char data)
+static void w83697hf_set_reg(unsigned char reg, unsigned char data)
{
outb_p(reg, W83697HF_EFIR);
outb_p(data, W83697HF_EFDR);
}
-static void
-w83697hf_write_timeout(int timeout)
+static void w83697hf_write_timeout(int timeout)
{
- w83697hf_set_reg(0xF4, timeout); /* Write Timeout counter to CRF4 */
+ /* Write Timeout counter to CRF4 */
+ w83697hf_set_reg(0xF4, timeout);
}
-static void
-w83697hf_select_wdt(void)
+static void w83697hf_select_wdt(void)
{
w83697hf_unlock();
w83697hf_set_reg(0x07, 0x08); /* Switch to logic device 8 (GPIO2) */
}
-static inline void
-w83697hf_deselect_wdt(void)
+static inline void w83697hf_deselect_wdt(void)
{
w83697hf_lock();
}
-static void
-w83697hf_init(void)
+static void w83697hf_init(void)
{
unsigned char bbuf;
@@ -131,7 +130,9 @@ w83697hf_init(void)
bbuf = w83697hf_get_reg(0x29);
bbuf &= ~0x60;
bbuf |= 0x20;
- w83697hf_set_reg(0x29, bbuf); /* Set pin 119 to WDTO# mode (= CR29, WDT0) */
+
+ /* Set pin 119 to WDTO# mode (= CR29, WDT0) */
+ w83697hf_set_reg(0x29, bbuf);
bbuf = w83697hf_get_reg(0xF3);
bbuf &= ~0x04;
@@ -140,8 +141,7 @@ w83697hf_init(void)
w83697hf_deselect_wdt();
}
-static int
-wdt_ping(void)
+static int wdt_ping(void)
{
spin_lock(&io_lock);
w83697hf_select_wdt();
@@ -153,8 +153,7 @@ wdt_ping(void)
return 0;
}
-static int
-wdt_enable(void)
+static int wdt_enable(void)
{
spin_lock(&io_lock);
w83697hf_select_wdt();
@@ -167,8 +166,7 @@ wdt_enable(void)
return 0;
}
-static int
-wdt_disable(void)
+static int wdt_disable(void)
{
spin_lock(&io_lock);
w83697hf_select_wdt();
@@ -181,18 +179,17 @@ wdt_disable(void)
return 0;
}
-static int
-wdt_set_heartbeat(int t)
+static int wdt_set_heartbeat(int t)
{
- if ((t < 1) || (t > 255))
+ if (t < 1 || t > 255)
return -EINVAL;
timeout = t;
return 0;
}
-static ssize_t
-wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+static ssize_t wdt_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
if (count) {
if (!nowayout) {
@@ -213,15 +210,14 @@ wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
return count;
}
-static int
-wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
int new_timeout;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ static const struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT
+ | WDIOF_MAGICCLOSE,
.firmware_version = 1,
.identity = "W83697HF WDT",
};
@@ -277,8 +273,7 @@ wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
return 0;
}
-static int
-wdt_open(struct inode *inode, struct file *file)
+static int wdt_open(struct inode *inode, struct file *file)
{
if (test_and_set_bit(0, &wdt_is_open))
return -EBUSY;
@@ -290,13 +285,13 @@ wdt_open(struct inode *inode, struct file *file)
return nonseekable_open(inode, file);
}
-static int
-wdt_close(struct inode *inode, struct file *file)
+static int wdt_close(struct inode *inode, struct file *file)
{
- if (expect_close == 42) {
+ if (expect_close == 42)
wdt_disable();
- } else {
- printk (KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ else {
+ printk(KERN_CRIT PFX
+ "Unexpected close, not stopping watchdog!\n");
wdt_ping();
}
expect_close = 0;
@@ -308,8 +303,7 @@ wdt_close(struct inode *inode, struct file *file)
* Notifier for system down
*/
-static int
-wdt_notify_sys(struct notifier_block *this, unsigned long code,
+static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
if (code == SYS_DOWN || code == SYS_HALT) {
@@ -327,7 +321,7 @@ static const struct file_operations wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = wdt_write,
- .ioctl = wdt_ioctl,
+ .unlocked_ioctl = wdt_ioctl,
.open = wdt_open,
.release = wdt_close,
};
@@ -347,36 +341,38 @@ static struct notifier_block wdt_notifier = {
.notifier_call = wdt_notify_sys,
};
-static int
-w83697hf_check_wdt(void)
+static int w83697hf_check_wdt(void)
{
if (!request_region(wdt_io, 2, WATCHDOG_NAME)) {
- printk (KERN_ERR PFX "I/O address 0x%x already in use\n", wdt_io);
+ printk(KERN_ERR PFX
+ "I/O address 0x%x already in use\n", wdt_io);
return -EIO;
}
- printk (KERN_DEBUG PFX "Looking for watchdog at address 0x%x\n", wdt_io);
+ printk(KERN_DEBUG PFX
+ "Looking for watchdog at address 0x%x\n", wdt_io);
w83697hf_unlock();
if (w83697hf_get_reg(0x20) == 0x60) {
- printk (KERN_INFO PFX "watchdog found at address 0x%x\n", wdt_io);
+ printk(KERN_INFO PFX
+ "watchdog found at address 0x%x\n", wdt_io);
w83697hf_lock();
return 0;
}
- w83697hf_lock(); /* Reprotect in case it was a compatible device */
+ /* Reprotect in case it was a compatible device */
+ w83697hf_lock();
- printk (KERN_INFO PFX "watchdog not found at address 0x%x\n", wdt_io);
+ printk(KERN_INFO PFX "watchdog not found at address 0x%x\n", wdt_io);
release_region(wdt_io, 2);
return -EIO;
}
static int w83697hf_ioports[] = { 0x2e, 0x4e, 0x00 };
-static int __init
-wdt_init(void)
+static int __init wdt_init(void)
{
int ret, i, found = 0;
- printk (KERN_INFO PFX "WDT driver for W83697HF/HG initializing\n");
+ printk(KERN_INFO PFX "WDT driver for W83697HF/HG initializing\n");
if (wdt_io == 0) {
/* we will autodetect the W83697HF/HG watchdog */
@@ -391,7 +387,7 @@ wdt_init(void)
}
if (!found) {
- printk (KERN_ERR PFX "No W83697HF/HG could be found\n");
+ printk(KERN_ERR PFX "No W83697HF/HG could be found\n");
ret = -EIO;
goto out;
}
@@ -401,25 +397,27 @@ wdt_init(void)
if (wdt_set_heartbeat(timeout)) {
wdt_set_heartbeat(WATCHDOG_TIMEOUT);
- printk (KERN_INFO PFX "timeout value must be 1<=timeout<=255, using %d\n",
- WATCHDOG_TIMEOUT);
+ printk(KERN_INFO PFX
+ "timeout value must be 1 <= timeout <= 255, using %d\n",
+ WATCHDOG_TIMEOUT);
}
ret = register_reboot_notifier(&wdt_notifier);
if (ret != 0) {
- printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", ret);
goto unreg_regions;
}
ret = misc_register(&wdt_miscdev);
if (ret != 0) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
goto unreg_reboot;
}
- printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
+ printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
timeout, nowayout);
out:
@@ -431,8 +429,7 @@ unreg_regions:
goto out;
}
-static void __exit
-wdt_exit(void)
+static void __exit wdt_exit(void)
{
misc_deregister(&wdt_miscdev);
unregister_reboot_notifier(&wdt_notifier);
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 51/57] w83877f_wdt: clean up code, coding style, switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (49 preceding siblings ...)
2008-05-19 13:09 ` [PATCH 50/57] w83697hf_wdt: cleanup, coding style " Alan Cox
@ 2008-05-19 13:09 ` Alan Cox
2008-05-19 13:09 ` [PATCH 52/57] w83977f_wdt: clean up, coding style and " Alan Cox
` (6 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:09 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/w83877f_wdt.c | 199 ++++++++++++++++++++--------------------
1 files changed, 101 insertions(+), 98 deletions(-)
diff --git a/drivers/watchdog/w83877f_wdt.c b/drivers/watchdog/w83877f_wdt.c
index f510a3a..75b546d 100644
--- a/drivers/watchdog/w83877f_wdt.c
+++ b/drivers/watchdog/w83877f_wdt.c
@@ -23,13 +23,16 @@
* Added KERN_* tags to printks
* add CONFIG_WATCHDOG_NOWAYOUT support
* fix possible wdt_is_open race
- * changed watchdog_info to correctly reflect what the driver offers
- * added WDIOC_GETSTATUS, WDIOC_GETBOOTSTATUS, WDIOC_SETTIMEOUT,
+ * changed watchdog_info to correctly reflect what
+ * the driver offers
+ * added WDIOC_GETSTATUS, WDIOC_GETBOOTSTATUS,
+ * WDIOC_SETTIMEOUT,
* WDIOC_GETTIMEOUT, and WDIOC_SETOPTIONS ioctls
* 09/8 - 2003 [wim@iguana.be] cleanup of trailing spaces
* added extra printk's for startup problems
* use module_param
- * made timeout (the emulated heartbeat) a module_param
+ * made timeout (the emulated heartbeat) a
+ * module_param
* made the keepalive ping an internal subroutine
*
* This WDT driver is different from most other Linux WDT
@@ -51,8 +54,8 @@
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/init.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
#include <asm/system.h>
#define OUR_NAME "w83877f_wdt"
@@ -80,14 +83,19 @@
*/
#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */
-static int timeout = WATCHDOG_TIMEOUT; /* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
+/* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
+static int timeout = WATCHDOG_TIMEOUT;
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds. (1<=timeout<=3600, default="
+ __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
static void wdt_timer_ping(unsigned long);
static DEFINE_TIMER(timer, wdt_timer_ping, 0, 0);
@@ -105,8 +113,7 @@ static void wdt_timer_ping(unsigned long data)
/* If we got a heartbeat pulse within the WDT_US_INTERVAL
* we agree to ping the WDT
*/
- if(time_before(jiffies, next_heartbeat))
- {
+ if (time_before(jiffies, next_heartbeat)) {
/* Ping the WDT */
spin_lock(&wdt_spinlock);
@@ -118,9 +125,9 @@ static void wdt_timer_ping(unsigned long data)
spin_unlock(&wdt_spinlock);
- } else {
- printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
- }
+ } else
+ printk(KERN_WARNING PFX
+ "Heartbeat lost! Will not ping the watchdog\n");
}
/*
@@ -181,22 +188,21 @@ static void wdt_keepalive(void)
* /dev/watchdog handling
*/
-static ssize_t fop_write(struct file * file, const char __user * buf, size_t count, loff_t * ppos)
+static ssize_t fop_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
/* See if we got the magic character 'V' and reload the timer */
- if(count)
- {
- if (!nowayout)
- {
+ if (count) {
+ if (!nowayout) {
size_t ofs;
- /* note: just in case someone wrote the magic character
- * five months ago... */
+ /* note: just in case someone wrote the magic
+ character five months ago... */
wdt_expect_close = 0;
- /* scan to see whether or not we got the magic character */
- for(ofs = 0; ofs != count; ofs++)
- {
+ /* scan to see whether or not we got the
+ magic character */
+ for (ofs = 0; ofs != count; ofs++) {
char c;
if (get_user(c, buf + ofs))
return -EFAULT;
@@ -211,10 +217,10 @@ static ssize_t fop_write(struct file * file, const char __user * buf, size_t cou
return count;
}
-static int fop_open(struct inode * inode, struct file * file)
+static int fop_open(struct inode *inode, struct file *file)
{
/* Just in case we're already talking to someone... */
- if(test_and_set_bit(0, &wdt_is_open))
+ if (test_and_set_bit(0, &wdt_is_open))
return -EBUSY;
/* Good, fire up the show */
@@ -222,78 +228,78 @@ static int fop_open(struct inode * inode, struct file * file)
return nonseekable_open(inode, file);
}
-static int fop_close(struct inode * inode, struct file * file)
+static int fop_close(struct inode *inode, struct file *file)
{
- if(wdt_expect_close == 42)
+ if (wdt_expect_close == 42)
wdt_turnoff();
else {
del_timer(&timer);
- printk(KERN_CRIT PFX "device file closed unexpectedly. Will not stop the WDT!\n");
+ printk(KERN_CRIT PFX
+ "device file closed unexpectedly. Will not stop the WDT!\n");
}
clear_bit(0, &wdt_is_open);
wdt_expect_close = 0;
return 0;
}
-static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
- static struct watchdog_info ident=
- {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ static const struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT
+ | WDIOF_MAGICCLOSE,
.firmware_version = 1,
.identity = "W83877F",
};
- switch(cmd)
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ wdt_keepalive();
+ return 0;
+ case WDIOC_SETOPTIONS:
{
- default:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- wdt_keepalive();
- return 0;
- case WDIOC_SETOPTIONS:
- {
- int new_options, retval = -EINVAL;
-
- if(get_user(new_options, p))
- return -EFAULT;
-
- if(new_options & WDIOS_DISABLECARD) {
- wdt_turnoff();
- retval = 0;
- }
+ int new_options, retval = -EINVAL;
- if(new_options & WDIOS_ENABLECARD) {
- wdt_startup();
- retval = 0;
- }
+ if (get_user(new_options, p))
+ return -EFAULT;
- return retval;
+ if (new_options & WDIOS_DISABLECARD) {
+ wdt_turnoff();
+ retval = 0;
}
- case WDIOC_SETTIMEOUT:
- {
- int new_timeout;
- if(get_user(new_timeout, p))
- return -EFAULT;
+ if (new_options & WDIOS_ENABLECARD) {
+ wdt_startup();
+ retval = 0;
+ }
- if(new_timeout < 1 || new_timeout > 3600) /* arbitrary upper limit */
- return -EINVAL;
+ return retval;
+ }
+ case WDIOC_SETTIMEOUT:
+ {
+ int new_timeout;
- timeout = new_timeout;
- wdt_keepalive();
- /* Fall through */
- }
- case WDIOC_GETTIMEOUT:
- return put_user(timeout, p);
+ if (get_user(new_timeout, p))
+ return -EFAULT;
+
+ /* arbitrary upper limit */
+ if (new_timeout < 1 || new_timeout > 3600)
+ return -EINVAL;
+
+ timeout = new_timeout;
+ wdt_keepalive();
+ /* Fall through */
+ }
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, p);
}
}
@@ -303,7 +309,7 @@ static const struct file_operations wdt_fops = {
.write = fop_write,
.open = fop_open,
.release = fop_close,
- .ioctl = fop_ioctl,
+ .unlocked_ioctl = fop_ioctl,
};
static struct miscdevice wdt_miscdev = {
@@ -319,7 +325,7 @@ static struct miscdevice wdt_miscdev = {
static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
- if(code==SYS_DOWN || code==SYS_HALT)
+ if (code == SYS_DOWN || code == SYS_HALT)
wdt_turnoff();
return NOTIFY_DONE;
}
@@ -329,8 +335,7 @@ static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
* turn the timebomb registers off.
*/
-static struct notifier_block wdt_notifier=
-{
+static struct notifier_block wdt_notifier = {
.notifier_call = wdt_notify_sys,
};
@@ -342,31 +347,29 @@ static void __exit w83877f_wdt_unload(void)
misc_deregister(&wdt_miscdev);
unregister_reboot_notifier(&wdt_notifier);
- release_region(WDT_PING,1);
- release_region(ENABLE_W83877F_PORT,2);
+ release_region(WDT_PING, 1);
+ release_region(ENABLE_W83877F_PORT, 2);
}
static int __init w83877f_wdt_init(void)
{
int rc = -EBUSY;
- if(timeout < 1 || timeout > 3600) /* arbitrary upper limit */
- {
+ if (timeout < 1 || timeout > 3600) { /* arbitrary upper limit */
timeout = WATCHDOG_TIMEOUT;
- printk(KERN_INFO PFX "timeout value must be 1<=x<=3600, using %d\n",
- timeout);
+ printk(KERN_INFO PFX
+ "timeout value must be 1 <= x <= 3600, using %d\n",
+ timeout);
}
- if (!request_region(ENABLE_W83877F_PORT, 2, "W83877F WDT"))
- {
+ if (!request_region(ENABLE_W83877F_PORT, 2, "W83877F WDT")) {
printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
ENABLE_W83877F_PORT);
rc = -EIO;
goto err_out;
}
- if (!request_region(WDT_PING, 1, "W8387FF WDT"))
- {
+ if (!request_region(WDT_PING, 1, "W8387FF WDT")) {
printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
WDT_PING);
rc = -EIO;
@@ -374,22 +377,22 @@ static int __init w83877f_wdt_init(void)
}
rc = register_reboot_notifier(&wdt_notifier);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
+ if (rc) {
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", rc);
goto err_out_region2;
}
rc = misc_register(&wdt_miscdev);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- wdt_miscdev.minor, rc);
+ if (rc) {
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt_miscdev.minor, rc);
goto err_out_reboot;
}
- printk(KERN_INFO PFX "WDT driver for W83877F initialised. timeout=%d sec (nowayout=%d)\n",
+ printk(KERN_INFO PFX
+ "WDT driver for W83877F initialised. timeout=%d sec (nowayout=%d)\n",
timeout, nowayout);
return 0;
@@ -397,9 +400,9 @@ static int __init w83877f_wdt_init(void)
err_out_reboot:
unregister_reboot_notifier(&wdt_notifier);
err_out_region2:
- release_region(WDT_PING,1);
+ release_region(WDT_PING, 1);
err_out_region1:
- release_region(ENABLE_W83877F_PORT,2);
+ release_region(ENABLE_W83877F_PORT, 2);
err_out:
return rc;
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 52/57] w83977f_wdt: clean up, coding style and switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (50 preceding siblings ...)
2008-05-19 13:09 ` [PATCH 51/57] w83877f_wdt: clean up code, coding style, " Alan Cox
@ 2008-05-19 13:09 ` Alan Cox
2008-05-19 13:09 ` [PATCH 53/57] wafer5823wdt: Clean up, coding style, " Alan Cox
` (5 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:09 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/w83977f_wdt.c | 225 ++++++++++++++++++++--------------------
1 files changed, 111 insertions(+), 114 deletions(-)
diff --git a/drivers/watchdog/w83977f_wdt.c b/drivers/watchdog/w83977f_wdt.c
index b209bcd..6860a13 100644
--- a/drivers/watchdog/w83977f_wdt.c
+++ b/drivers/watchdog/w83977f_wdt.c
@@ -26,10 +26,10 @@
#include <linux/watchdog.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
-#include <asm/io.h>
#include <asm/system.h>
-#include <asm/uaccess.h>
#define WATCHDOG_VERSION "1.00"
#define WATCHDOG_NAME "W83977F WDT"
@@ -53,13 +53,17 @@ static char expect_close;
static DEFINE_SPINLOCK(spinlock);
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout,"Watchdog timeout in seconds (15..7635), default=" __MODULE_STRING(DEFAULT_TIMEOUT) ")");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds (15..7635), default="
+ __MODULE_STRING(DEFAULT_TIMEOUT) ")");
module_param(testmode, int, 0);
-MODULE_PARM_DESC(testmode,"Watchdog testmode (1 = no reboot), default=0");
+MODULE_PARM_DESC(testmode, "Watchdog testmode (1 = no reboot), default=0");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* Start the watchdog
@@ -72,8 +76,8 @@ static int wdt_start(void)
spin_lock_irqsave(&spinlock, flags);
/* Unlock the SuperIO chip */
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
/*
* Select device Aux2 (device=8) to set watchdog regs F2, F3 and F4.
@@ -81,50 +85,49 @@ static int wdt_start(void)
* F3 is set to enable watchdog LED blink at timeout.
* F4 is used to just clear the TIMEOUT'ed state (bit 0).
*/
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
- outb_p(0xF2,IO_INDEX_PORT);
- outb_p(timeoutW,IO_DATA_PORT);
- outb_p(0xF3,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
- outb_p(0xF4,IO_INDEX_PORT);
- outb_p(0x00,IO_DATA_PORT);
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF2, IO_INDEX_PORT);
+ outb_p(timeoutW, IO_DATA_PORT);
+ outb_p(0xF3, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF4, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT);
/* Set device Aux2 active */
- outb_p(0x30,IO_INDEX_PORT);
- outb_p(0x01,IO_DATA_PORT);
+ outb_p(0x30, IO_INDEX_PORT);
+ outb_p(0x01, IO_DATA_PORT);
- /*
+ /*
* Select device Aux1 (dev=7) to set GP16 as the watchdog output
* (in reg E6) and GP13 as the watchdog LED output (in reg E3).
* Map GP16 at pin 119.
* In test mode watch the bit 0 on F4 to indicate "triggered" or
* check watchdog LED on SBC.
*/
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x07,IO_DATA_PORT);
- if (!testmode)
- {
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x07, IO_DATA_PORT);
+ if (!testmode) {
unsigned pin_map;
- outb_p(0xE6,IO_INDEX_PORT);
- outb_p(0x0A,IO_DATA_PORT);
- outb_p(0x2C,IO_INDEX_PORT);
+ outb_p(0xE6, IO_INDEX_PORT);
+ outb_p(0x0A, IO_DATA_PORT);
+ outb_p(0x2C, IO_INDEX_PORT);
pin_map = inb_p(IO_DATA_PORT);
pin_map |= 0x10;
pin_map &= ~(0x20);
- outb_p(0x2C,IO_INDEX_PORT);
- outb_p(pin_map,IO_DATA_PORT);
+ outb_p(0x2C, IO_INDEX_PORT);
+ outb_p(pin_map, IO_DATA_PORT);
}
- outb_p(0xE3,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
+ outb_p(0xE3, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
/* Set device Aux1 active */
- outb_p(0x30,IO_INDEX_PORT);
- outb_p(0x01,IO_DATA_PORT);
+ outb_p(0x30, IO_INDEX_PORT);
+ outb_p(0x01, IO_DATA_PORT);
/* Lock the SuperIO chip */
- outb_p(LOCK_DATA,IO_INDEX_PORT);
+ outb_p(LOCK_DATA, IO_INDEX_PORT);
spin_unlock_irqrestore(&spinlock, flags);
@@ -144,42 +147,41 @@ static int wdt_stop(void)
spin_lock_irqsave(&spinlock, flags);
/* Unlock the SuperIO chip */
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
- /*
+ /*
* Select device Aux2 (device=8) to set watchdog regs F2, F3 and F4.
* F2 is reset to its default value (watchdog timer disabled).
* F3 is reset to its default state.
* F4 clears the TIMEOUT'ed state (bit 0) - back to default.
*/
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
- outb_p(0xF2,IO_INDEX_PORT);
- outb_p(0xFF,IO_DATA_PORT);
- outb_p(0xF3,IO_INDEX_PORT);
- outb_p(0x00,IO_DATA_PORT);
- outb_p(0xF4,IO_INDEX_PORT);
- outb_p(0x00,IO_DATA_PORT);
- outb_p(0xF2,IO_INDEX_PORT);
- outb_p(0x00,IO_DATA_PORT);
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF2, IO_INDEX_PORT);
+ outb_p(0xFF, IO_DATA_PORT);
+ outb_p(0xF3, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT);
+ outb_p(0xF4, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT);
+ outb_p(0xF2, IO_INDEX_PORT);
+ outb_p(0x00, IO_DATA_PORT);
/*
- * Select device Aux1 (dev=7) to set GP16 (in reg E6) and
+ * Select device Aux1 (dev=7) to set GP16 (in reg E6) and
* Gp13 (in reg E3) as inputs.
*/
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x07,IO_DATA_PORT);
- if (!testmode)
- {
- outb_p(0xE6,IO_INDEX_PORT);
- outb_p(0x01,IO_DATA_PORT);
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x07, IO_DATA_PORT);
+ if (!testmode) {
+ outb_p(0xE6, IO_INDEX_PORT);
+ outb_p(0x01, IO_DATA_PORT);
}
- outb_p(0xE3,IO_INDEX_PORT);
- outb_p(0x01,IO_DATA_PORT);
+ outb_p(0xE3, IO_INDEX_PORT);
+ outb_p(0x01, IO_DATA_PORT);
/* Lock the SuperIO chip */
- outb_p(LOCK_DATA,IO_INDEX_PORT);
+ outb_p(LOCK_DATA, IO_INDEX_PORT);
spin_unlock_irqrestore(&spinlock, flags);
@@ -200,17 +202,17 @@ static int wdt_keepalive(void)
spin_lock_irqsave(&spinlock, flags);
/* Unlock the SuperIO chip */
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
/* Select device Aux2 (device=8) to kick watchdog reg F2 */
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
- outb_p(0xF2,IO_INDEX_PORT);
- outb_p(timeoutW,IO_DATA_PORT);
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF2, IO_INDEX_PORT);
+ outb_p(timeoutW, IO_DATA_PORT);
/* Lock the SuperIO chip */
- outb_p(LOCK_DATA,IO_INDEX_PORT);
+ outb_p(LOCK_DATA, IO_INDEX_PORT);
spin_unlock_irqrestore(&spinlock, flags);
@@ -227,7 +229,7 @@ static int wdt_set_timeout(int t)
/*
* Convert seconds to watchdog counter time units, rounding up.
- * On PCM-5335 watchdog units are 30 seconds/step with 15 sec startup
+ * On PCM-5335 watchdog units are 30 seconds/step with 15 sec startup
* value. This information is supplied in the PCM-5335 manual and was
* checked by me on a real board. This is a bit strange because W83977f
* datasheet says counter unit is in minutes!
@@ -241,7 +243,7 @@ static int wdt_set_timeout(int t)
return -EINVAL;
/*
- * timeout is the timeout in seconds,
+ * timeout is the timeout in seconds,
* timeoutW is the timeout in watchdog counter units.
*/
timeoutW = tmrval;
@@ -261,17 +263,17 @@ static int wdt_get_status(int *status)
spin_lock_irqsave(&spinlock, flags);
/* Unlock the SuperIO chip */
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
- outb_p(UNLOCK_DATA,IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
+ outb_p(UNLOCK_DATA, IO_INDEX_PORT);
/* Select device Aux2 (device=8) to read watchdog reg F4 */
- outb_p(DEVICE_REGISTER,IO_INDEX_PORT);
- outb_p(0x08,IO_DATA_PORT);
- outb_p(0xF4,IO_INDEX_PORT);
+ outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
+ outb_p(0x08, IO_DATA_PORT);
+ outb_p(0xF4, IO_INDEX_PORT);
new_status = inb_p(IO_DATA_PORT);
/* Lock the SuperIO chip */
- outb_p(LOCK_DATA,IO_INDEX_PORT);
+ outb_p(LOCK_DATA, IO_INDEX_PORT);
spin_unlock_irqrestore(&spinlock, flags);
@@ -290,7 +292,7 @@ static int wdt_get_status(int *status)
static int wdt_open(struct inode *inode, struct file *file)
{
/* If the watchdog is alive we don't need to start it again */
- if( test_and_set_bit(0, &timer_alive) )
+ if (test_and_set_bit(0, &timer_alive))
return -EBUSY;
if (nowayout)
@@ -306,13 +308,13 @@ static int wdt_release(struct inode *inode, struct file *file)
* Shut off the timer.
* Lock it in if it's a module and we set nowayout
*/
- if (expect_close == 42)
- {
+ if (expect_close == 42) {
wdt_stop();
clear_bit(0, &timer_alive);
} else {
wdt_keepalive();
- printk(KERN_CRIT PFX "unexpected close, not stopping watchdog!\n");
+ printk(KERN_CRIT PFX
+ "unexpected close, not stopping watchdog!\n");
}
expect_close = 0;
return 0;
@@ -333,24 +335,22 @@ static ssize_t wdt_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
/* See if we got the magic character 'V' and reload the timer */
- if(count)
- {
- if (!nowayout)
- {
+ if (count) {
+ if (!nowayout) {
size_t ofs;
- /* note: just in case someone wrote the magic character long ago */
+ /* note: just in case someone wrote the
+ magic character long ago */
expect_close = 0;
- /* scan to see whether or not we got the magic character */
- for(ofs = 0; ofs != count; ofs++)
- {
+ /* scan to see whether or not we got the
+ magic character */
+ for (ofs = 0; ofs != count; ofs++) {
char c;
if (get_user(c, buf + ofs))
return -EFAULT;
- if (c == 'V') {
+ if (c == 'V')
expect_close = 42;
- }
}
}
@@ -377,8 +377,7 @@ static struct watchdog_info ident = {
.identity = WATCHDOG_NAME,
};
-static int wdt_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
int status;
int new_options, retval = -EINVAL;
@@ -390,13 +389,13 @@ static int wdt_ioctl(struct inode *inode, struct file *file,
uarg.i = (int __user *)arg;
- switch(cmd)
- {
+ switch (cmd) {
default:
return -ENOTTY;
case WDIOC_GETSUPPORT:
- return copy_to_user(uarg.ident, &ident, sizeof(ident)) ? -EFAULT : 0;
+ return copy_to_user(uarg.ident, &ident,
+ sizeof(ident)) ? -EFAULT : 0;
case WDIOC_GETSTATUS:
wdt_get_status(&status);
@@ -410,7 +409,7 @@ static int wdt_ioctl(struct inode *inode, struct file *file,
return 0;
case WDIOC_SETOPTIONS:
- if (get_user (new_options, uarg.i))
+ if (get_user(new_options, uarg.i))
return -EFAULT;
if (new_options & WDIOS_DISABLECARD) {
@@ -444,23 +443,21 @@ static int wdt_ioctl(struct inode *inode, struct file *file,
static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
- if (code==SYS_DOWN || code==SYS_HALT)
+ if (code == SYS_DOWN || code == SYS_HALT)
wdt_stop();
return NOTIFY_DONE;
}
-static const struct file_operations wdt_fops=
-{
+static const struct file_operations wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = wdt_write,
- .ioctl = wdt_ioctl,
+ .unlocked_ioctl = wdt_ioctl,
.open = wdt_open,
.release = wdt_release,
};
-static struct miscdevice wdt_miscdev=
-{
+static struct miscdevice wdt_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &wdt_fops,
@@ -474,20 +471,20 @@ static int __init w83977f_wdt_init(void)
{
int rc;
- printk(KERN_INFO PFX DRIVER_VERSION);
+ printk(KERN_INFO PFX DRIVER_VERSION);
/*
- * Check that the timeout value is within it's range ;
+ * Check that the timeout value is within it's range;
* if not reset to the default
*/
if (wdt_set_timeout(timeout)) {
wdt_set_timeout(DEFAULT_TIMEOUT);
- printk(KERN_INFO PFX "timeout value must be 15<=timeout<=7635, using %d\n",
- DEFAULT_TIMEOUT);
+ printk(KERN_INFO PFX
+ "timeout value must be 15 <= timeout <= 7635, using %d\n",
+ DEFAULT_TIMEOUT);
}
- if (!request_region(IO_INDEX_PORT, 2, WATCHDOG_NAME))
- {
+ if (!request_region(IO_INDEX_PORT, 2, WATCHDOG_NAME)) {
printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
IO_INDEX_PORT);
rc = -EIO;
@@ -495,30 +492,30 @@ static int __init w83977f_wdt_init(void)
}
rc = register_reboot_notifier(&wdt_notifier);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
+ if (rc) {
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", rc);
goto err_out_region;
}
rc = misc_register(&wdt_miscdev);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- wdt_miscdev.minor, rc);
+ if (rc) {
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt_miscdev.minor, rc);
goto err_out_reboot;
}
- printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d testmode=%d)\n",
- timeout, nowayout, testmode);
+ printk(KERN_INFO PFX
+ "initialized. timeout=%d sec (nowayout=%d testmode=%d)\n",
+ timeout, nowayout, testmode);
return 0;
err_out_reboot:
unregister_reboot_notifier(&wdt_notifier);
err_out_region:
- release_region(IO_INDEX_PORT,2);
+ release_region(IO_INDEX_PORT, 2);
err_out:
return rc;
}
@@ -528,7 +525,7 @@ static void __exit w83977f_wdt_exit(void)
wdt_stop();
misc_deregister(&wdt_miscdev);
unregister_reboot_notifier(&wdt_notifier);
- release_region(IO_INDEX_PORT,2);
+ release_region(IO_INDEX_PORT, 2);
}
module_init(w83977f_wdt_init);
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 53/57] wafer5823wdt: Clean up, coding style, switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (51 preceding siblings ...)
2008-05-19 13:09 ` [PATCH 52/57] w83977f_wdt: clean up, coding style and " Alan Cox
@ 2008-05-19 13:09 ` Alan Cox
2008-05-19 13:09 ` [PATCH 54/57] wdrtas: clean " Alan Cox
` (4 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:09 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/wafer5823wdt.c | 80 ++++++++++++++++++++++-----------------
1 files changed, 46 insertions(+), 34 deletions(-)
diff --git a/drivers/watchdog/wafer5823wdt.c b/drivers/watchdog/wafer5823wdt.c
index 9e36809..886cbbc 100644
--- a/drivers/watchdog/wafer5823wdt.c
+++ b/drivers/watchdog/wafer5823wdt.c
@@ -36,8 +36,8 @@
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/spinlock.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
#define WATCHDOG_NAME "Wafer 5823 WDT"
#define PFX WATCHDOG_NAME ": "
@@ -61,11 +61,15 @@ static int wdt_start = 0x443;
static int timeout = WD_TIMO; /* in seconds */
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WD_TIMO) ".");
+MODULE_PARM_DESC(timeout,
+ "Watchdog timeout in seconds. 1 <= timeout <= 255, default="
+ __MODULE_STRING(WD_TIMO) ".");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
static void wafwdt_ping(void)
{
@@ -90,7 +94,8 @@ wafwdt_stop(void)
inb_p(wdt_stop);
}
-static ssize_t wafwdt_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
+static ssize_t wafwdt_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
/* See if we got the magic character 'V' and reload the timer */
if (count) {
@@ -100,7 +105,8 @@ static ssize_t wafwdt_write(struct file *file, const char __user *buf, size_t co
/* In case it was set long ago */
expect_close = 0;
- /* scan to see whether or not we got the magic character */
+ /* scan to see whether or not we got the magic
+ character */
for (i = 0; i != count; i++) {
char c;
if (get_user(c, buf + i))
@@ -109,27 +115,29 @@ static ssize_t wafwdt_write(struct file *file, const char __user *buf, size_t co
expect_close = 42;
}
}
- /* Well, anyhow someone wrote to us, we should return that favour */
+ /* Well, anyhow someone wrote to us, we should
+ return that favour */
wafwdt_ping();
}
return count;
}
-static int wafwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long wafwdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int new_timeout;
void __user *argp = (void __user *)arg;
int __user *p = argp;
- static struct watchdog_info ident = {
- .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ static const struct watchdog_info ident = {
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE,
.firmware_version = 1,
.identity = "Wafer 5823 WDT",
};
switch (cmd) {
case WDIOC_GETSUPPORT:
- if (copy_to_user(argp, &ident, sizeof (ident)))
+ if (copy_to_user(argp, &ident, sizeof(ident)))
return -EFAULT;
break;
@@ -194,10 +202,11 @@ static int wafwdt_open(struct inode *inode, struct file *file)
static int
wafwdt_close(struct inode *inode, struct file *file)
{
- if (expect_close == 42) {
+ if (expect_close == 42)
wafwdt_stop();
- } else {
- printk(KERN_CRIT PFX "WDT device closed unexpectedly. WDT will not stop!\n");
+ else {
+ printk(KERN_CRIT PFX
+ "WDT device closed unexpectedly. WDT will not stop!\n");
wafwdt_ping();
}
clear_bit(0, &wafwdt_is_open);
@@ -209,12 +218,11 @@ wafwdt_close(struct inode *inode, struct file *file)
* Notifier for system down
*/
-static int wafwdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused)
+static int wafwdt_notify_sys(struct notifier_block *this, unsigned long code,
+ void *unused)
{
- if (code == SYS_DOWN || code == SYS_HALT) {
- /* Turn the WDT off */
+ if (code == SYS_DOWN || code == SYS_HALT)
wafwdt_stop();
- }
return NOTIFY_DONE;
}
@@ -226,7 +234,7 @@ static const struct file_operations wafwdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = wafwdt_write,
- .ioctl = wafwdt_ioctl,
+ .unlocked_ioctl = wafwdt_ioctl,
.open = wafwdt_open,
.release = wafwdt_close,
};
@@ -250,25 +258,28 @@ static int __init wafwdt_init(void)
{
int ret;
- printk(KERN_INFO "WDT driver for Wafer 5823 single board computer initialising.\n");
+ printk(KERN_INFO
+ "WDT driver for Wafer 5823 single board computer initialising.\n");
if (timeout < 1 || timeout > 255) {
timeout = WD_TIMO;
- printk (KERN_INFO PFX "timeout value must be 1<=x<=255, using %d\n",
- timeout);
+ printk(KERN_INFO PFX
+ "timeout value must be 1 <= x <= 255, using %d\n",
+ timeout);
}
if (wdt_stop != wdt_start) {
- if(!request_region(wdt_stop, 1, "Wafer 5823 WDT")) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
- wdt_stop);
+ if (!request_region(wdt_stop, 1, "Wafer 5823 WDT")) {
+ printk(KERN_ERR PFX
+ "I/O address 0x%04x already in use\n",
+ wdt_stop);
ret = -EIO;
goto error;
}
}
- if(!request_region(wdt_start, 1, "Wafer 5823 WDT")) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ if (!request_region(wdt_start, 1, "Wafer 5823 WDT")) {
+ printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
wdt_start);
ret = -EIO;
goto error2;
@@ -276,19 +287,20 @@ static int __init wafwdt_init(void)
ret = register_reboot_notifier(&wafwdt_notifier);
if (ret != 0) {
- printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- ret);
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", ret);
goto error3;
}
ret = misc_register(&wafwdt_miscdev);
if (ret != 0) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
goto error4;
}
- printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
+ printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
timeout, nowayout);
return ret;
@@ -307,7 +319,7 @@ static void __exit wafwdt_exit(void)
{
misc_deregister(&wafwdt_miscdev);
unregister_reboot_notifier(&wafwdt_notifier);
- if(wdt_stop != wdt_start)
+ if (wdt_stop != wdt_start)
release_region(wdt_stop, 1);
release_region(wdt_start, 1);
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 54/57] wdrtas: clean up, coding style, switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (52 preceding siblings ...)
2008-05-19 13:09 ` [PATCH 53/57] wafer5823wdt: Clean up, coding style, " Alan Cox
@ 2008-05-19 13:09 ` Alan Cox
2008-05-19 13:09 ` [PATCH 55/57] wdt285: switch to unlocked_ioctl and tidy up oddments of coding style Alan Cox
` (3 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:09 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/wdrtas.c | 103 ++++++++++++++++++---------------------------
1 files changed, 41 insertions(+), 62 deletions(-)
diff --git a/drivers/watchdog/wdrtas.c b/drivers/watchdog/wdrtas.c
index 1d64e27..20fd671 100644
--- a/drivers/watchdog/wdrtas.c
+++ b/drivers/watchdog/wdrtas.c
@@ -35,9 +35,9 @@
#include <linux/reboot.h>
#include <linux/types.h>
#include <linux/watchdog.h>
+#include <linux/uaccess.h>
#include <asm/rtas.h>
-#include <asm/uaccess.h>
#define WDRTAS_MAGIC_CHAR 42
#define WDRTAS_SUPPORTED_MASK (WDIOF_SETTIMEOUT | \
@@ -56,7 +56,7 @@ static int wdrtas_nowayout = 0;
#endif
static atomic_t wdrtas_miscdev_open = ATOMIC_INIT(0);
-static char wdrtas_expect_close = 0;
+static char wdrtas_expect_close;
static int wdrtas_interval;
@@ -86,8 +86,8 @@ static char wdrtas_logbuffer[WDRTAS_LOGBUFFER_LEN];
* RTAS function set-indicator (surveillance). The unit of interval is
* seconds.
*/
-static int
-wdrtas_set_interval(int interval)
+
+static int wdrtas_set_interval(int interval)
{
long result;
static int print_msg = 10;
@@ -97,7 +97,7 @@ wdrtas_set_interval(int interval)
result = rtas_call(wdrtas_token_set_indicator, 3, 1, NULL,
WDRTAS_SURVEILLANCE_IND, 0, interval);
- if ( (result < 0) && (print_msg) ) {
+ if (result < 0 && print_msg) {
printk(KERN_ERR "wdrtas: setting the watchdog to %i "
"timeout failed: %li\n", interval, result);
print_msg--;
@@ -116,16 +116,14 @@ wdrtas_set_interval(int interval)
* as reported by the RTAS function ibm,get-system-parameter. The unit
* of the return value is seconds.
*/
-static int
-wdrtas_get_interval(int fallback_value)
+static int wdrtas_get_interval(int fallback_value)
{
long result;
char value[4];
result = rtas_call(wdrtas_token_get_sp, 3, 1, NULL,
WDRTAS_SP_SPI, (void *)__pa(&value), 4);
- if ( (value[0] != 0) || (value[1] != 2) || (value[3] != 0) ||
- (result < 0) ) {
+ if (value[0] != 0 || value[1] != 2 || value[3] != 0 || result < 0) {
printk(KERN_WARNING "wdrtas: could not get sp_spi watchdog "
"timeout (%li). Continuing\n", result);
return fallback_value;
@@ -141,8 +139,7 @@ wdrtas_get_interval(int fallback_value)
* wdrtas_timer_start starts the watchdog by calling the RTAS function
* set-interval (surveillance)
*/
-static void
-wdrtas_timer_start(void)
+static void wdrtas_timer_start(void)
{
wdrtas_set_interval(wdrtas_interval);
}
@@ -153,8 +150,7 @@ wdrtas_timer_start(void)
* wdrtas_timer_stop stops the watchdog timer by calling the RTAS function
* set-interval (surveillance)
*/
-static void
-wdrtas_timer_stop(void)
+static void wdrtas_timer_stop(void)
{
wdrtas_set_interval(0);
}
@@ -165,8 +161,7 @@ wdrtas_timer_stop(void)
* wdrtas_log_scanned_event prints a message to the log buffer dumping
* the results of the last event-scan call
*/
-static void
-wdrtas_log_scanned_event(void)
+static void wdrtas_log_scanned_event(void)
{
int i;
@@ -175,13 +170,13 @@ wdrtas_log_scanned_event(void)
"%02x %02x %02x %02x %02x %02x %02x %02x "
"%02x %02x %02x %02x %02x %02x %02x %02x\n",
(i / 16) + 1, (WDRTAS_LOGBUFFER_LEN / 16),
- wdrtas_logbuffer[i + 0], wdrtas_logbuffer[i + 1],
- wdrtas_logbuffer[i + 2], wdrtas_logbuffer[i + 3],
- wdrtas_logbuffer[i + 4], wdrtas_logbuffer[i + 5],
- wdrtas_logbuffer[i + 6], wdrtas_logbuffer[i + 7],
- wdrtas_logbuffer[i + 8], wdrtas_logbuffer[i + 9],
- wdrtas_logbuffer[i + 10], wdrtas_logbuffer[i + 11],
- wdrtas_logbuffer[i + 12], wdrtas_logbuffer[i + 13],
+ wdrtas_logbuffer[i + 0], wdrtas_logbuffer[i + 1],
+ wdrtas_logbuffer[i + 2], wdrtas_logbuffer[i + 3],
+ wdrtas_logbuffer[i + 4], wdrtas_logbuffer[i + 5],
+ wdrtas_logbuffer[i + 6], wdrtas_logbuffer[i + 7],
+ wdrtas_logbuffer[i + 8], wdrtas_logbuffer[i + 9],
+ wdrtas_logbuffer[i + 10], wdrtas_logbuffer[i + 11],
+ wdrtas_logbuffer[i + 12], wdrtas_logbuffer[i + 13],
wdrtas_logbuffer[i + 14], wdrtas_logbuffer[i + 15]);
}
@@ -192,8 +187,7 @@ wdrtas_log_scanned_event(void)
* RTAS function event-scan and repeats these calls as long as there are
* events available. All events will be dumped.
*/
-static void
-wdrtas_timer_keepalive(void)
+static void wdrtas_timer_keepalive(void)
{
long result;
@@ -218,8 +212,7 @@ wdrtas_timer_keepalive(void)
* wdrtas_get_temperature returns the current temperature in Fahrenheit. It
* uses the RTAS call get-sensor-state, token 3 to do so
*/
-static int
-wdrtas_get_temperature(void)
+static int wdrtas_get_temperature(void)
{
long result;
int temperature = 0;
@@ -243,8 +236,7 @@ wdrtas_get_temperature(void)
* returns a bitmask of defines WDIOF_... as defined in
* include/linux/watchdog.h
*/
-static int
-wdrtas_get_status(void)
+static int wdrtas_get_status(void)
{
return 0; /* TODO */
}
@@ -255,8 +247,7 @@ wdrtas_get_status(void)
* returns a bitmask of defines WDIOF_... as defined in
* include/linux/watchdog.h, indicating why the watchdog rebooted the system
*/
-static int
-wdrtas_get_boot_status(void)
+static int wdrtas_get_boot_status(void)
{
return 0; /* TODO */
}
@@ -276,8 +267,7 @@ wdrtas_get_boot_status(void)
* character 'V'. This character allows the watchdog device to be closed
* properly.
*/
-static ssize_t
-wdrtas_write(struct file *file, const char __user *buf,
+static ssize_t wdrtas_write(struct file *file, const char __user *buf,
size_t len, loff_t *ppos)
{
int i;
@@ -306,7 +296,6 @@ out:
/**
* wdrtas_ioctl - ioctl function for the watchdog device
- * @inode: inode structure
* @file: file structure
* @cmd: command for ioctl
* @arg: argument pointer
@@ -315,9 +304,9 @@ out:
*
* wdrtas_ioctl implements the watchdog API ioctls
*/
-static int
-wdrtas_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+
+static long wdrtas_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int __user *argp = (void __user *)arg;
int i;
@@ -357,9 +346,9 @@ wdrtas_ioctl(struct inode *inode, struct file *file,
wdrtas_timer_keepalive();
wdrtas_timer_start();
}
+ /* not implemented. Done by H8
if (i & WDIOS_TEMPPANIC) {
- /* not implemented. Done by H8 */
- }
+ } */
return 0;
case WDIOC_KEEPALIVE:
@@ -399,8 +388,7 @@ wdrtas_ioctl(struct inode *inode, struct file *file,
*
* function called when watchdog device is opened
*/
-static int
-wdrtas_open(struct inode *inode, struct file *file)
+static int wdrtas_open(struct inode *inode, struct file *file)
{
/* only open once */
if (atomic_inc_return(&wdrtas_miscdev_open) > 1) {
@@ -423,8 +411,7 @@ wdrtas_open(struct inode *inode, struct file *file)
*
* close function. Always succeeds
*/
-static int
-wdrtas_close(struct inode *inode, struct file *file)
+static int wdrtas_close(struct inode *inode, struct file *file)
{
/* only stop watchdog, if this was announced using 'V' before */
if (wdrtas_expect_close == WDRTAS_MAGIC_CHAR)
@@ -453,8 +440,7 @@ wdrtas_close(struct inode *inode, struct file *file)
* wdrtas_temp_read gives the temperature to the users by copying this
* value as one byte into the user space buffer. The unit is Fahrenheit...
*/
-static ssize_t
-wdrtas_temp_read(struct file *file, char __user *buf,
+static ssize_t wdrtas_temp_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
int temperature = 0;
@@ -478,8 +464,7 @@ wdrtas_temp_read(struct file *file, char __user *buf,
*
* function called when temperature device is opened
*/
-static int
-wdrtas_temp_open(struct inode *inode, struct file *file)
+static int wdrtas_temp_open(struct inode *inode, struct file *file)
{
return nonseekable_open(inode, file);
}
@@ -493,8 +478,7 @@ wdrtas_temp_open(struct inode *inode, struct file *file)
*
* close function. Always succeeds
*/
-static int
-wdrtas_temp_close(struct inode *inode, struct file *file)
+static int wdrtas_temp_close(struct inode *inode, struct file *file)
{
return 0;
}
@@ -509,10 +493,10 @@ wdrtas_temp_close(struct inode *inode, struct file *file)
*
* wdrtas_reboot stops the watchdog in case of a reboot
*/
-static int
-wdrtas_reboot(struct notifier_block *this, unsigned long code, void *ptr)
+static int wdrtas_reboot(struct notifier_block *this,
+ unsigned long code, void *ptr)
{
- if ( (code==SYS_DOWN) || (code==SYS_HALT) )
+ if (code == SYS_DOWN || code == SYS_HALT)
wdrtas_timer_stop();
return NOTIFY_DONE;
@@ -524,7 +508,7 @@ static const struct file_operations wdrtas_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = wdrtas_write,
- .ioctl = wdrtas_ioctl,
+ .unlocked_ioctl = wdrtas_ioctl,
.open = wdrtas_open,
.release = wdrtas_close,
};
@@ -562,8 +546,7 @@ static struct notifier_block wdrtas_notifier = {
* this watchdog driver. It tolerates, if "get-sensor-state" and
* "ibm,get-system-parameter" are not available.
*/
-static int
-wdrtas_get_tokens(void)
+static int wdrtas_get_tokens(void)
{
wdrtas_token_get_sensor_state = rtas_token("get-sensor-state");
if (wdrtas_token_get_sensor_state == RTAS_UNKNOWN_SERVICE) {
@@ -603,8 +586,7 @@ wdrtas_get_tokens(void)
* wdrtas_register_devs unregisters the watchdog and temperature watchdog
* misc devs
*/
-static void
-wdrtas_unregister_devs(void)
+static void wdrtas_unregister_devs(void)
{
misc_deregister(&wdrtas_miscdev);
if (wdrtas_token_get_sensor_state != RTAS_UNKNOWN_SERVICE)
@@ -619,8 +601,7 @@ wdrtas_unregister_devs(void)
* wdrtas_register_devs registers the watchdog and temperature watchdog
* misc devs
*/
-static int
-wdrtas_register_devs(void)
+static int wdrtas_register_devs(void)
{
int result;
@@ -651,8 +632,7 @@ wdrtas_register_devs(void)
*
* registers the file handlers and the reboot notifier
*/
-static int __init
-wdrtas_init(void)
+static int __init wdrtas_init(void)
{
if (wdrtas_get_tokens())
return -ENODEV;
@@ -680,8 +660,7 @@ wdrtas_init(void)
*
* unregisters the file handlers and the reboot notifier
*/
-static void __exit
-wdrtas_exit(void)
+static void __exit wdrtas_exit(void)
{
if (!wdrtas_nowayout)
wdrtas_timer_stop();
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 55/57] wdt285: switch to unlocked_ioctl and tidy up oddments of coding style
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (53 preceding siblings ...)
2008-05-19 13:09 ` [PATCH 54/57] wdrtas: clean " Alan Cox
@ 2008-05-19 13:09 ` Alan Cox
2008-05-19 13:09 ` [PATCH 56/57] wdt977: clean up, coding style and switch to unlocked_ioctl Alan Cox
` (2 subsequent siblings)
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:09 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/wdt285.c | 31 ++++++++++++++++---------------
1 files changed, 16 insertions(+), 15 deletions(-)
diff --git a/drivers/watchdog/wdt285.c b/drivers/watchdog/wdt285.c
index e4cf661..fea398a 100644
--- a/drivers/watchdog/wdt285.c
+++ b/drivers/watchdog/wdt285.c
@@ -26,9 +26,9 @@
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/interrupt.h>
+#include <linux/uaccess.h>
+#include <linux/irq.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
#include <asm/hardware.h>
#include <asm/mach-types.h>
#include <asm/hardware/dec21285.h>
@@ -115,8 +115,8 @@ static int watchdog_release(struct inode *inode, struct file *file)
return 0;
}
-static ssize_t
-watchdog_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+static ssize_t watchdog_write(struct file *file, const char *data,
+ size_t len, loff_t *ppos)
{
/*
* Refresh the timer.
@@ -127,19 +127,18 @@ watchdog_write(struct file *file, const char *data, size_t len, loff_t *ppos)
return len;
}
-static struct watchdog_info ident = {
+static const struct watchdog_info ident = {
.options = WDIOF_SETTIMEOUT,
.identity = "Footbridge Watchdog",
};
-static int
-watchdog_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long watchdog_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
unsigned int new_margin;
int ret = -ENOTTY;
- switch(cmd) {
+ switch (cmd) {
case WDIOC_GETSUPPORT:
ret = 0;
if (copy_to_user((void *)arg, &ident, sizeof(ident)))
@@ -148,7 +147,7 @@ watchdog_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
case WDIOC_GETSTATUS:
case WDIOC_GETBOOTSTATUS:
- ret = put_user(0,(int *)arg);
+ ret = put_user(0, (int *)arg);
break;
case WDIOC_KEEPALIVE:
@@ -182,7 +181,7 @@ static const struct file_operations watchdog_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = watchdog_write,
- .ioctl = watchdog_ioctl,
+ .unlocked_ioctl = watchdog_ioctl,
.open = watchdog_open,
.release = watchdog_release,
};
@@ -204,11 +203,13 @@ static int __init footbridge_watchdog_init(void)
if (retval < 0)
return retval;
- printk("Footbridge Watchdog Timer: 0.01, timer margin: %d sec\n",
- soft_margin);
+ printk(KERN_INFO
+ "Footbridge Watchdog Timer: 0.01, timer margin: %d sec\n",
+ soft_margin);
if (machine_is_cats())
- printk("Warning: Watchdog reset may not work on this machine.\n");
+ printk(KERN_WARN
+ "Warning: Watchdog reset may not work on this machine.\n");
return 0;
}
@@ -223,7 +224,7 @@ MODULE_LICENSE("GPL");
MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
module_param(soft_margin, int, 0);
-MODULE_PARM_DESC(soft_margin,"Watchdog timeout in seconds");
+MODULE_PARM_DESC(soft_margin, "Watchdog timeout in seconds");
module_init(footbridge_watchdog_init);
module_exit(footbridge_watchdog_exit);
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 56/57] wdt977: clean up, coding style and switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (54 preceding siblings ...)
2008-05-19 13:09 ` [PATCH 55/57] wdt285: switch to unlocked_ioctl and tidy up oddments of coding style Alan Cox
@ 2008-05-19 13:09 ` Alan Cox
2008-05-19 13:10 ` [PATCH 57/57] wdt501/pci: Clean " Alan Cox
2008-05-19 18:21 ` [PATCH 00/57] watchdog: Giant scrub Andrew Morton
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:09 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/wdt977.c | 148 +++++++++++++++++++++++----------------------
1 files changed, 74 insertions(+), 74 deletions(-)
diff --git a/drivers/watchdog/wdt977.c b/drivers/watchdog/wdt977.c
index fb4b876..bdc28e5 100644
--- a/drivers/watchdog/wdt977.c
+++ b/drivers/watchdog/wdt977.c
@@ -19,7 +19,8 @@
* 07-Jul-2003 Daniele Bellucci: Audit return code of misc_register in
* nwwatchdog_init.
* 25-Oct-2005 Woody Suwalski: Convert addresses to #defs, add spinlocks
- * remove limitiation to be used on Netwinders only
+ * remove limitiation to be used on
+ * Netwinders only
*/
#include <linux/module.h>
@@ -33,11 +34,11 @@
#include <linux/watchdog.h>
#include <linux/notifier.h>
#include <linux/reboot.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
-#include <asm/io.h>
#include <asm/system.h>
#include <asm/mach-types.h>
-#include <asm/uaccess.h>
#define WATCHDOG_VERSION "0.04"
#define WATCHDOG_NAME "Wdt977"
@@ -45,7 +46,7 @@
#define DRIVER_VERSION WATCHDOG_NAME " driver, v" WATCHDOG_VERSION "\n"
#define IO_INDEX_PORT 0x370 /* on some systems it can be 0x3F0 */
-#define IO_DATA_PORT (IO_INDEX_PORT+1)
+#define IO_DATA_PORT (IO_INDEX_PORT + 1)
#define UNLOCK_DATA 0x87
#define LOCK_DATA 0xAA
@@ -62,13 +63,16 @@ static char expect_close;
static DEFINE_SPINLOCK(spinlock);
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout,"Watchdog timeout in seconds (60..15300), default=" __MODULE_STRING(DEFAULT_TIMEOUT) ")");
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds (60..15300), default="
+ __MODULE_STRING(DEFAULT_TIMEOUT) ")");
module_param(testmode, int, 0);
-MODULE_PARM_DESC(testmode,"Watchdog testmode (1 = no reboot), default=0");
+MODULE_PARM_DESC(testmode, "Watchdog testmode (1 = no reboot), default=0");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* Start the watchdog
@@ -95,14 +99,16 @@ static int wdt977_start(void)
outb_p(0xF2, IO_INDEX_PORT);
outb_p(timeoutM, IO_DATA_PORT);
outb_p(0xF3, IO_INDEX_PORT);
- outb_p(0x00, IO_DATA_PORT); /* another setting is 0E for kbd/mouse/LED */
+ outb_p(0x00, IO_DATA_PORT); /* another setting is 0E for
+ kbd/mouse/LED */
outb_p(0xF4, IO_INDEX_PORT);
outb_p(0x00, IO_DATA_PORT);
- /* at last select device Aux1 (dev=7) and set GP16 as a watchdog output */
- /* in test mode watch the bit 1 on F4 to indicate "triggered" */
- if (!testmode)
- {
+ /* At last select device Aux1 (dev=7) and set GP16 as a
+ * watchdog output. In test mode watch the bit 1 on F4 to
+ * indicate "triggered"
+ */
+ if (!testmode) {
outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
outb_p(0x07, IO_DATA_PORT);
outb_p(0xE6, IO_INDEX_PORT);
@@ -147,7 +153,8 @@ static int wdt977_stop(void)
outb_p(0xF2, IO_INDEX_PORT);
outb_p(0x00, IO_DATA_PORT);
- /* at last select device Aux1 (dev=7) and set GP16 as a watchdog output */
+ /* at last select device Aux1 (dev=7) and set
+ GP16 as a watchdog output */
outb_p(DEVICE_REGISTER, IO_INDEX_PORT);
outb_p(0x07, IO_DATA_PORT);
outb_p(0xE6, IO_INDEX_PORT);
@@ -202,16 +209,18 @@ static int wdt977_set_timeout(int t)
tmrval = (t + 59) / 60;
if (machine_is_netwinder()) {
- /* we have a hw bug somewhere, so each 977 minute is actually only 30sec
- * this limits the max timeout to half of device max of 255 minutes...
+ /* we have a hw bug somewhere, so each 977 minute is actually
+ * only 30sec. This limits the max timeout to half of device
+ * max of 255 minutes...
*/
tmrval += tmrval;
}
- if ((tmrval < 1) || (tmrval > 255))
+ if (tmrval < 1 || tmrval > 255)
return -EINVAL;
- /* timeout is the timeout in seconds, timeoutM is the timeout in minutes) */
+ /* timeout is the timeout in seconds, timeoutM is
+ the timeout in minutes) */
timeout = t;
timeoutM = tmrval;
return 0;
@@ -243,7 +252,7 @@ static int wdt977_get_status(int *status)
spin_unlock_irqrestore(&spinlock, flags);
- *status=0;
+ *status = 0;
if (new_status & 1)
*status |= WDIOF_CARDRESET;
@@ -258,7 +267,7 @@ static int wdt977_get_status(int *status)
static int wdt977_open(struct inode *inode, struct file *file)
{
/* If the watchdog is alive we don't need to start it again */
- if( test_and_set_bit(0,&timer_alive) )
+ if (test_and_set_bit(0, &timer_alive))
return -EBUSY;
if (nowayout)
@@ -274,13 +283,13 @@ static int wdt977_release(struct inode *inode, struct file *file)
* Shut off the timer.
* Lock it in if it's a module and we set nowayout
*/
- if (expect_close == 42)
- {
+ if (expect_close == 42) {
wdt977_stop();
- clear_bit(0,&timer_alive);
+ clear_bit(0, &timer_alive);
} else {
wdt977_keepalive();
- printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
+ printk(KERN_CRIT PFX
+ "Unexpected close, not stopping watchdog!\n");
}
expect_close = 0;
return 0;
@@ -301,17 +310,14 @@ static int wdt977_release(struct inode *inode, struct file *file)
static ssize_t wdt977_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
- if (count)
- {
- if (!nowayout)
- {
+ if (count) {
+ if (!nowayout) {
size_t i;
/* In case it was set long ago */
expect_close = 0;
- for (i = 0; i != count; i++)
- {
+ for (i = 0; i != count; i++) {
char c;
if (get_user(c, buf + i))
return -EFAULT;
@@ -326,6 +332,14 @@ static ssize_t wdt977_write(struct file *file, const char __user *buf,
return count;
}
+static const struct watchdog_info ident = {
+ .options = WDIOF_SETTIMEOUT |
+ WDIOF_MAGICCLOSE |
+ WDIOF_KEEPALIVEPING,
+ .firmware_version = 1,
+ .identity = WATCHDOG_NAME,
+};
+
/*
* wdt977_ioctl:
* @inode: inode of the device
@@ -337,16 +351,8 @@ static ssize_t wdt977_write(struct file *file, const char __user *buf,
* according to their available features.
*/
-static struct watchdog_info ident = {
- .options = WDIOF_SETTIMEOUT |
- WDIOF_MAGICCLOSE |
- WDIOF_KEEPALIVEPING,
- .firmware_version = 1,
- .identity = WATCHDOG_NAME,
-};
-
-static int wdt977_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long wdt977_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int status;
int new_options, retval = -EINVAL;
@@ -358,8 +364,7 @@ static int wdt977_ioctl(struct inode *inode, struct file *file,
uarg.i = (int __user *)arg;
- switch(cmd)
- {
+ switch (cmd) {
default:
return -ENOTTY;
@@ -379,7 +384,7 @@ static int wdt977_ioctl(struct inode *inode, struct file *file,
return 0;
case WDIOC_SETOPTIONS:
- if (get_user (new_options, uarg.i))
+ if (get_user(new_options, uarg.i))
return -EFAULT;
if (new_options & WDIOS_DISABLECARD) {
@@ -413,23 +418,21 @@ static int wdt977_ioctl(struct inode *inode, struct file *file,
static int wdt977_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
- if(code==SYS_DOWN || code==SYS_HALT)
+ if (code == SYS_DOWN || code == SYS_HALT)
wdt977_stop();
return NOTIFY_DONE;
}
-static const struct file_operations wdt977_fops=
-{
+static const struct file_operations wdt977_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = wdt977_write,
- .ioctl = wdt977_ioctl,
+ .unlocked_ioctl = wdt977_ioctl,
.open = wdt977_open,
.release = wdt977_release,
};
-static struct miscdevice wdt977_miscdev=
-{
+static struct miscdevice wdt977_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &wdt977_fops,
@@ -443,51 +446,48 @@ static int __init wd977_init(void)
{
int rc;
- //if (!machine_is_netwinder())
- // return -ENODEV;
-
printk(KERN_INFO PFX DRIVER_VERSION);
- /* Check that the timeout value is within it's range ; if not reset to the default */
- if (wdt977_set_timeout(timeout))
- {
+ /* Check that the timeout value is within its range;
+ if not reset to the default */
+ if (wdt977_set_timeout(timeout)) {
wdt977_set_timeout(DEFAULT_TIMEOUT);
- printk(KERN_INFO PFX "timeout value must be 60<timeout<15300, using %d\n",
- DEFAULT_TIMEOUT);
+ printk(KERN_INFO PFX
+ "timeout value must be 60 < timeout < 15300, using %d\n",
+ DEFAULT_TIMEOUT);
}
/* on Netwinder the IOports are already reserved by
* arch/arm/mach-footbridge/netwinder-hw.c
*/
- if (!machine_is_netwinder())
- {
- if (!request_region(IO_INDEX_PORT, 2, WATCHDOG_NAME))
- {
- printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
- IO_INDEX_PORT);
+ if (!machine_is_netwinder()) {
+ if (!request_region(IO_INDEX_PORT, 2, WATCHDOG_NAME)) {
+ printk(KERN_ERR PFX
+ "I/O address 0x%04x already in use\n",
+ IO_INDEX_PORT);
rc = -EIO;
goto err_out;
}
}
rc = register_reboot_notifier(&wdt977_notifier);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
- rc);
+ if (rc) {
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", rc);
goto err_out_region;
}
rc = misc_register(&wdt977_miscdev);
- if (rc)
- {
- printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- wdt977_miscdev.minor, rc);
+ if (rc) {
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt977_miscdev.minor, rc);
goto err_out_reboot;
}
- printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d, testmode=%i)\n",
- timeout, nowayout, testmode);
+ printk(KERN_INFO PFX
+ "initialized. timeout=%d sec (nowayout=%d, testmode=%i)\n",
+ timeout, nowayout, testmode);
return 0;
@@ -495,7 +495,7 @@ err_out_reboot:
unregister_reboot_notifier(&wdt977_notifier);
err_out_region:
if (!machine_is_netwinder())
- release_region(IO_INDEX_PORT,2);
+ release_region(IO_INDEX_PORT, 2);
err_out:
return rc;
}
@@ -505,7 +505,7 @@ static void __exit wd977_exit(void)
wdt977_stop();
misc_deregister(&wdt977_miscdev);
unregister_reboot_notifier(&wdt977_notifier);
- release_region(IO_INDEX_PORT,2);
+ release_region(IO_INDEX_PORT, 2);
}
module_init(wd977_init);
^ permalink raw reply related [flat|nested] 72+ messages in thread* [PATCH 57/57] wdt501/pci: Clean up, coding style and switch to unlocked_ioctl
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (55 preceding siblings ...)
2008-05-19 13:09 ` [PATCH 56/57] wdt977: clean up, coding style and switch to unlocked_ioctl Alan Cox
@ 2008-05-19 13:10 ` Alan Cox
2008-05-19 18:21 ` [PATCH 00/57] watchdog: Giant scrub Andrew Morton
57 siblings, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 13:10 UTC (permalink / raw)
To: akpm, linux-kernel, wim
From: Alan Cox <alan@redhat.com>
---
drivers/watchdog/wdt.c | 176 ++++++++++++++------------
drivers/watchdog/wdt_pci.c | 300 +++++++++++++++++++++++++-------------------
2 files changed, 265 insertions(+), 211 deletions(-)
diff --git a/drivers/watchdog/wdt.c b/drivers/watchdog/wdt.c
index 756fb15..53a6b18 100644
--- a/drivers/watchdog/wdt.c
+++ b/drivers/watchdog/wdt.c
@@ -24,9 +24,10 @@
* Matt Crocker).
* Alan Cox : Added wdt= boot option
* Alan Cox : Cleaned up copy/user stuff
- * Tim Hockin : Added insmod parameters, comment cleanup
- * Parameterized timeout
- * Tigran Aivazian : Restructured wdt_init() to handle failures
+ * Tim Hockin : Added insmod parameters, comment
+ * cleanup, parameterized timeout
+ * Tigran Aivazian : Restructured wdt_init() to handle
+ * failures
* Joel Becker : Added WDIOC_GET/SETTIMEOUT
* Matt Domsch : Added nowayout module option
*/
@@ -42,9 +43,9 @@
#include <linux/notifier.h>
#include <linux/reboot.h>
#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
#include "wd501p.h"
@@ -60,15 +61,19 @@ static char expect_close;
static int heartbeat = WD_TIMO;
static int wd_heartbeat;
module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" __MODULE_STRING(WD_TIMO) ")");
+MODULE_PARM_DESC(heartbeat,
+ "Watchdog heartbeat in seconds. (0 < heartbeat < 65536, default="
+ __MODULE_STRING(WD_TIMO) ")");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/* You must set these - there is no sane way to probe for this board. */
-static int io=0x240;
-static int irq=11;
+static int io = 0x240;
+static int irq = 11;
static DEFINE_SPINLOCK(wdt_lock);
@@ -82,7 +87,8 @@ MODULE_PARM_DESC(irq, "WDT irq (default=11)");
static int tachometer;
module_param(tachometer, int, 0);
-MODULE_PARM_DESC(tachometer, "WDT501-P Fan Tachometer support (0=disable, default=0)");
+MODULE_PARM_DESC(tachometer,
+ "WDT501-P Fan Tachometer support (0=disable, default=0)");
#endif /* CONFIG_WDT_501 */
/*
@@ -91,9 +97,9 @@ MODULE_PARM_DESC(tachometer, "WDT501-P Fan Tachometer support (0=disable, defaul
static void wdt_ctr_mode(int ctr, int mode)
{
- ctr<<=6;
- ctr|=0x30;
- ctr|=(mode<<1);
+ ctr <<= 6;
+ ctr |= 0x30;
+ ctr |= (mode << 1);
outb_p(ctr, WDT_CR);
}
@@ -114,12 +120,15 @@ static int wdt_start(void)
unsigned long flags;
spin_lock_irqsave(&wdt_lock, flags);
inb_p(WDT_DC); /* Disable watchdog */
- wdt_ctr_mode(0,3); /* Program CTR0 for Mode 3: Square Wave Generator */
- wdt_ctr_mode(1,2); /* Program CTR1 for Mode 2: Rate Generator */
- wdt_ctr_mode(2,0); /* Program CTR2 for Mode 0: Pulse on Terminal Count */
+ wdt_ctr_mode(0, 3); /* Program CTR0 for Mode 3:
+ Square Wave Generator */
+ wdt_ctr_mode(1, 2); /* Program CTR1 for Mode 2:
+ Rate Generator */
+ wdt_ctr_mode(2, 0); /* Program CTR2 for Mode 0:
+ Pulse on Terminal Count */
wdt_ctr_load(0, 8948); /* Count at 100Hz */
- wdt_ctr_load(1,wd_heartbeat); /* Heartbeat */
- wdt_ctr_load(2,65535); /* Length of reset pulse */
+ wdt_ctr_load(1, wd_heartbeat); /* Heartbeat */
+ wdt_ctr_load(2, 65535); /* Length of reset pulse */
outb_p(0, WDT_DC); /* Enable watchdog */
spin_unlock_irqrestore(&wdt_lock, flags);
return 0;
@@ -131,13 +140,13 @@ static int wdt_start(void)
* Stop the watchdog driver.
*/
-static int wdt_stop (void)
+static int wdt_stop(void)
{
unsigned long flags;
spin_lock_irqsave(&wdt_lock, flags);
/* Turn the card off */
inb_p(WDT_DC); /* Disable watchdog */
- wdt_ctr_load(2,0); /* 0 length reset pulses now */
+ wdt_ctr_load(2, 0); /* 0 length reset pulses now */
spin_unlock_irqrestore(&wdt_lock, flags);
return 0;
}
@@ -145,8 +154,8 @@ static int wdt_stop (void)
/**
* wdt_ping:
*
- * Reload counter one with the watchdog heartbeat. We don't bother reloading
- * the cascade counter.
+ * Reload counter one with the watchdog heartbeat. We don't bother
+ * reloading the cascade counter.
*/
static int wdt_ping(void)
@@ -155,8 +164,9 @@ static int wdt_ping(void)
spin_lock_irqsave(&wdt_lock, flags);
/* Write a watchdog value */
inb_p(WDT_DC); /* Disable watchdog */
- wdt_ctr_mode(1,2); /* Re-Program CTR1 for Mode 2: Rate Generator */
- wdt_ctr_load(1,wd_heartbeat); /* Heartbeat */
+ wdt_ctr_mode(1, 2); /* Re-Program CTR1 for Mode 2:
+ Rate Generator */
+ wdt_ctr_load(1, wd_heartbeat); /* Heartbeat */
outb_p(0, WDT_DC); /* Enable watchdog */
spin_unlock_irqrestore(&wdt_lock, flags);
return 0;
@@ -166,13 +176,14 @@ static int wdt_ping(void)
* wdt_set_heartbeat:
* @t: the new heartbeat value that needs to be set.
*
- * Set a new heartbeat value for the watchdog device. If the heartbeat value is
- * incorrect we keep the old value and return -EINVAL. If successfull we
- * return 0.
+ * Set a new heartbeat value for the watchdog device. If the heartbeat
+ * value is incorrect we keep the old value and return -EINVAL. If
+ * successful we return 0.
*/
+
static int wdt_set_heartbeat(int t)
{
- if ((t < 1) || (t > 65535))
+ if (t < 1 || t > 65535)
return -EINVAL;
heartbeat = t;
@@ -200,7 +211,7 @@ static int wdt_get_status(int *status)
new_status = inb_p(WDT_SR);
spin_unlock_irqrestore(&wdt_lock, flags);
- *status=0;
+ *status = 0;
if (new_status & WDC_SR_ISOI0)
*status |= WDIOF_EXTERN1;
if (new_status & WDC_SR_ISII1)
@@ -266,7 +277,7 @@ static irqreturn_t wdt_interrupt(int irq, void *dev_id)
#ifdef CONFIG_WDT_501
if (!(status & WDC_SR_TGOOD))
- printk(KERN_CRIT "Overheat alarm.(%d)\n",inb_p(WDT_RT));
+ printk(KERN_CRIT "Overheat alarm.(%d)\n", inb_p(WDT_RT));
if (!(status & WDC_SR_PSUOVER))
printk(KERN_CRIT "PSU over voltage.\n");
if (!(status & WDC_SR_PSUUNDR))
@@ -304,9 +315,10 @@ static irqreturn_t wdt_interrupt(int irq, void *dev_id)
* write of data will do, as we we don't define content meaning.
*/
-static ssize_t wdt_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+static ssize_t wdt_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
- if(count) {
+ if (count) {
if (!nowayout) {
size_t i;
@@ -328,7 +340,6 @@ static ssize_t wdt_write(struct file *file, const char __user *buf, size_t count
/**
* wdt_ioctl:
- * @inode: inode of the device
* @file: file handle to the device
* @cmd: watchdog command
* @arg: argument pointer
@@ -338,8 +349,7 @@ static ssize_t wdt_write(struct file *file, const char __user *buf, size_t count
* querying capabilities and current status.
*/
-static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
@@ -362,32 +372,28 @@ static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
ident.options |= WDIOF_FANFAULT;
#endif /* CONFIG_WDT_501 */
- switch(cmd)
- {
- default:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
-
- case WDIOC_GETSTATUS:
- wdt_get_status(&status);
- return put_user(status, p);
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- wdt_ping();
- return 0;
- case WDIOC_SETTIMEOUT:
- if (get_user(new_heartbeat, p))
- return -EFAULT;
-
- if (wdt_set_heartbeat(new_heartbeat))
- return -EINVAL;
-
- wdt_ping();
- /* Fall */
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, p);
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ wdt_get_status(&status);
+ return put_user(status, p);
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ wdt_ping();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_heartbeat, p))
+ return -EFAULT;
+ if (wdt_set_heartbeat(new_heartbeat))
+ return -EINVAL;
+ wdt_ping();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(heartbeat, p);
}
}
@@ -405,7 +411,7 @@ static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
static int wdt_open(struct inode *inode, struct file *file)
{
- if(test_and_set_bit(0, &wdt_is_open))
+ if (test_and_set_bit(0, &wdt_is_open))
return -EBUSY;
/*
* Activate
@@ -432,7 +438,8 @@ static int wdt_release(struct inode *inode, struct file *file)
wdt_stop();
clear_bit(0, &wdt_is_open);
} else {
- printk(KERN_CRIT "wdt: WDT device closed unexpectedly. WDT will not stop!\n");
+ printk(KERN_CRIT
+ "wdt: WDT device closed unexpectedly. WDT will not stop!\n");
wdt_ping();
}
expect_close = 0;
@@ -451,14 +458,15 @@ static int wdt_release(struct inode *inode, struct file *file)
* farenheit. It was designed by an imperial measurement luddite.
*/
-static ssize_t wdt_temp_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
+static ssize_t wdt_temp_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ptr)
{
int temperature;
if (wdt_get_temperature(&temperature))
return -EFAULT;
- if (copy_to_user (buf, &temperature, 1))
+ if (copy_to_user(buf, &temperature, 1))
return -EFAULT;
return 1;
@@ -506,10 +514,8 @@ static int wdt_temp_release(struct inode *inode, struct file *file)
static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
- if(code==SYS_DOWN || code==SYS_HALT) {
- /* Turn the card off */
+ if (code == SYS_DOWN || code == SYS_HALT)
wdt_stop();
- }
return NOTIFY_DONE;
}
@@ -522,7 +528,7 @@ static const struct file_operations wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = wdt_write,
- .ioctl = wdt_ioctl,
+ .unlocked_ioctl = wdt_ioctl,
.open = wdt_open,
.release = wdt_release,
};
@@ -576,7 +582,7 @@ static void __exit wdt_exit(void)
#endif /* CONFIG_WDT_501 */
unregister_reboot_notifier(&wdt_notifier);
free_irq(irq, NULL);
- release_region(io,8);
+ release_region(io, 8);
}
/**
@@ -591,44 +597,49 @@ static int __init wdt_init(void)
{
int ret;
- /* Check that the heartbeat value is within it's range ; if not reset to the default */
+ /* Check that the heartbeat value is within it's range;
+ if not reset to the default */
if (wdt_set_heartbeat(heartbeat)) {
wdt_set_heartbeat(WD_TIMO);
- printk(KERN_INFO "wdt: heartbeat value must be 0<heartbeat<65536, using %d\n",
+ printk(KERN_INFO "wdt: heartbeat value must be 0 < heartbeat < 65536, using %d\n",
WD_TIMO);
}
if (!request_region(io, 8, "wdt501p")) {
- printk(KERN_ERR "wdt: I/O address 0x%04x already in use\n", io);
+ printk(KERN_ERR
+ "wdt: I/O address 0x%04x already in use\n", io);
ret = -EBUSY;
goto out;
}
ret = request_irq(irq, wdt_interrupt, IRQF_DISABLED, "wdt501p", NULL);
- if(ret) {
+ if (ret) {
printk(KERN_ERR "wdt: IRQ %d is not free.\n", irq);
goto outreg;
}
ret = register_reboot_notifier(&wdt_notifier);
- if(ret) {
- printk(KERN_ERR "wdt: cannot register reboot notifier (err=%d)\n", ret);
+ if (ret) {
+ printk(KERN_ERR
+ "wdt: cannot register reboot notifier (err=%d)\n", ret);
goto outirq;
}
#ifdef CONFIG_WDT_501
ret = misc_register(&temp_miscdev);
if (ret) {
- printk(KERN_ERR "wdt: cannot register miscdev on minor=%d (err=%d)\n",
- TEMP_MINOR, ret);
+ printk(KERN_ERR
+ "wdt: cannot register miscdev on minor=%d (err=%d)\n",
+ TEMP_MINOR, ret);
goto outrbt;
}
#endif /* CONFIG_WDT_501 */
ret = misc_register(&wdt_miscdev);
if (ret) {
- printk(KERN_ERR "wdt: cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ printk(KERN_ERR
+ "wdt: cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
goto outmisc;
}
@@ -636,7 +647,8 @@ static int __init wdt_init(void)
printk(KERN_INFO "WDT500/501-P driver 0.10 at 0x%04x (Interrupt %d). heartbeat=%d sec (nowayout=%d)\n",
io, irq, heartbeat, nowayout);
#ifdef CONFIG_WDT_501
- printk(KERN_INFO "wdt: Fan Tachometer is %s\n", (tachometer ? "Enabled" : "Disabled"));
+ printk(KERN_INFO "wdt: Fan Tachometer is %s\n",
+ (tachometer ? "Enabled" : "Disabled"));
#endif /* CONFIG_WDT_501 */
out:
@@ -651,7 +663,7 @@ outrbt:
outirq:
free_irq(irq, NULL);
outreg:
- release_region(io,8);
+ release_region(io, 8);
goto out;
}
diff --git a/drivers/watchdog/wdt_pci.c b/drivers/watchdog/wdt_pci.c
index 1355608..078f37f 100644
--- a/drivers/watchdog/wdt_pci.c
+++ b/drivers/watchdog/wdt_pci.c
@@ -29,9 +29,11 @@
* JP Nollmann : Added support for PCI wdt501p
* Alan Cox : Split ISA and PCI cards into two drivers
* Jeff Garzik : PCI cleanups
- * Tigran Aivazian : Restructured wdtpci_init_one() to handle failures
+ * Tigran Aivazian : Restructured wdtpci_init_one() to handle
+ * failures
* Joel Becker : Added WDIOC_GET/SETTIMEOUT
- * Zwane Mwaikambo : Magic char closing, locking changes, cleanups
+ * Zwane Mwaikambo : Magic char closing, locking changes,
+ * cleanups
* Matt Domsch : nowayout module option
*/
@@ -47,9 +49,9 @@
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/pci.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
#define WDT_IS_PCI
@@ -73,7 +75,7 @@
/* We can only use 1 card due to the /dev/watchdog restriction */
static int dev_count;
-static struct semaphore open_sem;
+static unsigned long open_lock;
static DEFINE_SPINLOCK(wdtpci_lock);
static char expect_close;
@@ -86,18 +88,23 @@ static int irq;
static int heartbeat = WD_TIMO;
static int wd_heartbeat;
module_param(heartbeat, int, 0);
-MODULE_PARM_DESC(heartbeat, "Watchdog heartbeat in seconds. (0<heartbeat<65536, default=" __MODULE_STRING(WD_TIMO) ")");
+MODULE_PARM_DESC(heartbeat,
+ "Watchdog heartbeat in seconds. (0<heartbeat<65536, default="
+ __MODULE_STRING(WD_TIMO) ")");
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
#ifdef CONFIG_WDT_501_PCI
/* Support for the Fan Tachometer on the PCI-WDT501 */
static int tachometer;
module_param(tachometer, int, 0);
-MODULE_PARM_DESC(tachometer, "PCI-WDT501 Fan Tachometer support (0=disable, default=0)");
+MODULE_PARM_DESC(tachometer,
+ "PCI-WDT501 Fan Tachometer support (0=disable, default=0)");
#endif /* CONFIG_WDT_501_PCI */
/*
@@ -106,16 +113,19 @@ MODULE_PARM_DESC(tachometer, "PCI-WDT501 Fan Tachometer support (0=disable, defa
static void wdtpci_ctr_mode(int ctr, int mode)
{
- ctr<<=6;
- ctr|=0x30;
- ctr|=(mode<<1);
- outb_p(ctr, WDT_CR);
+ ctr <<= 6;
+ ctr |= 0x30;
+ ctr |= (mode << 1);
+ outb(ctr, WDT_CR);
+ udelay(8);
}
static void wdtpci_ctr_load(int ctr, int val)
{
- outb_p(val&0xFF, WDT_COUNT0+ctr);
- outb_p(val>>8, WDT_COUNT0+ctr);
+ outb(val & 0xFF, WDT_COUNT0 + ctr);
+ udelay(8);
+ outb(val >> 8, WDT_COUNT0 + ctr);
+ udelay(8);
}
/**
@@ -134,23 +144,35 @@ static int wdtpci_start(void)
* "pet" the watchdog, as Access says.
* This resets the clock outputs.
*/
- inb_p(WDT_DC); /* Disable watchdog */
- wdtpci_ctr_mode(2,0); /* Program CTR2 for Mode 0: Pulse on Terminal Count */
- outb_p(0, WDT_DC); /* Enable watchdog */
-
- inb_p(WDT_DC); /* Disable watchdog */
- outb_p(0, WDT_CLOCK); /* 2.0833MHz clock */
- inb_p(WDT_BUZZER); /* disable */
- inb_p(WDT_OPTONOTRST); /* disable */
- inb_p(WDT_OPTORST); /* disable */
- inb_p(WDT_PROGOUT); /* disable */
- wdtpci_ctr_mode(0,3); /* Program CTR0 for Mode 3: Square Wave Generator */
- wdtpci_ctr_mode(1,2); /* Program CTR1 for Mode 2: Rate Generator */
- wdtpci_ctr_mode(2,1); /* Program CTR2 for Mode 1: Retriggerable One-Shot */
- wdtpci_ctr_load(0,20833); /* count at 100Hz */
- wdtpci_ctr_load(1,wd_heartbeat);/* Heartbeat */
+ inb(WDT_DC); /* Disable watchdog */
+ udelay(8);
+ wdtpci_ctr_mode(2, 0); /* Program CTR2 for Mode 0:
+ Pulse on Terminal Count */
+ outb(0, WDT_DC); /* Enable watchdog */
+ udelay(8);
+ inb(WDT_DC); /* Disable watchdog */
+ udelay(8);
+ outb(0, WDT_CLOCK); /* 2.0833MHz clock */
+ udelay(8);
+ inb(WDT_BUZZER); /* disable */
+ udelay(8);
+ inb(WDT_OPTONOTRST); /* disable */
+ udelay(8);
+ inb(WDT_OPTORST); /* disable */
+ udelay(8);
+ inb(WDT_PROGOUT); /* disable */
+ udelay(8);
+ wdtpci_ctr_mode(0, 3); /* Program CTR0 for Mode 3:
+ Square Wave Generator */
+ wdtpci_ctr_mode(1, 2); /* Program CTR1 for Mode 2:
+ Rate Generator */
+ wdtpci_ctr_mode(2, 1); /* Program CTR2 for Mode 1:
+ Retriggerable One-Shot */
+ wdtpci_ctr_load(0, 20833); /* count at 100Hz */
+ wdtpci_ctr_load(1, wd_heartbeat);/* Heartbeat */
/* DO NOT LOAD CTR2 on PCI card! -- JPN */
- outb_p(0, WDT_DC); /* Enable watchdog */
+ outb(0, WDT_DC); /* Enable watchdog */
+ udelay(8);
spin_unlock_irqrestore(&wdtpci_lock, flags);
return 0;
@@ -162,14 +184,15 @@ static int wdtpci_start(void)
* Stop the watchdog driver.
*/
-static int wdtpci_stop (void)
+static int wdtpci_stop(void)
{
unsigned long flags;
/* Turn the card off */
spin_lock_irqsave(&wdtpci_lock, flags);
- inb_p(WDT_DC); /* Disable watchdog */
- wdtpci_ctr_load(2,0); /* 0 length reset pulses now */
+ inb(WDT_DC); /* Disable watchdog */
+ udelay(8);
+ wdtpci_ctr_load(2, 0); /* 0 length reset pulses now */
spin_unlock_irqrestore(&wdtpci_lock, flags);
return 0;
}
@@ -177,20 +200,23 @@ static int wdtpci_stop (void)
/**
* wdtpci_ping:
*
- * Reload counter one with the watchdog heartbeat. We don't bother reloading
- * the cascade counter.
+ * Reload counter one with the watchdog heartbeat. We don't bother
+ * reloading the cascade counter.
*/
static int wdtpci_ping(void)
{
unsigned long flags;
- /* Write a watchdog value */
spin_lock_irqsave(&wdtpci_lock, flags);
- inb_p(WDT_DC); /* Disable watchdog */
- wdtpci_ctr_mode(1,2); /* Re-Program CTR1 for Mode 2: Rate Generator */
- wdtpci_ctr_load(1,wd_heartbeat);/* Heartbeat */
- outb_p(0, WDT_DC); /* Enable watchdog */
+ /* Write a watchdog value */
+ inb(WDT_DC); /* Disable watchdog */
+ udelay(8);
+ wdtpci_ctr_mode(1, 2); /* Re-Program CTR1 for Mode 2:
+ Rate Generator */
+ wdtpci_ctr_load(1, wd_heartbeat);/* Heartbeat */
+ outb(0, WDT_DC); /* Enable watchdog */
+ udelay(8);
spin_unlock_irqrestore(&wdtpci_lock, flags);
return 0;
}
@@ -199,14 +225,14 @@ static int wdtpci_ping(void)
* wdtpci_set_heartbeat:
* @t: the new heartbeat value that needs to be set.
*
- * Set a new heartbeat value for the watchdog device. If the heartbeat value is
- * incorrect we keep the old value and return -EINVAL. If successfull we
- * return 0.
+ * Set a new heartbeat value for the watchdog device. If the heartbeat
+ * value is incorrect we keep the old value and return -EINVAL.
+ * If successful we return 0.
*/
static int wdtpci_set_heartbeat(int t)
{
/* Arbitrary, can't find the card's limits */
- if ((t < 1) || (t > 65535))
+ if (t < 1 || t > 65535)
return -EINVAL;
heartbeat = t;
@@ -227,9 +253,14 @@ static int wdtpci_set_heartbeat(int t)
static int wdtpci_get_status(int *status)
{
- unsigned char new_status=inb_p(WDT_SR);
+ unsigned char new_status;
+ unsigned long flags;
+
+ spin_lock_irqsave(&wdtpci_lock, flags);
+ new_status = inb(WDT_SR);
+ spin_unlock_irqrestore(&wdtpci_lock, flags);
- *status=0;
+ *status = 0;
if (new_status & WDC_SR_ISOI0)
*status |= WDIOF_EXTERN1;
if (new_status & WDC_SR_ISII1)
@@ -259,8 +290,12 @@ static int wdtpci_get_status(int *status)
static int wdtpci_get_temperature(int *temperature)
{
- unsigned short c=inb_p(WDT_RT);
-
+ unsigned short c;
+ unsigned long flags;
+ spin_lock_irqsave(&wdtpci_lock, flags);
+ c = inb(WDT_RT);
+ udelay(8);
+ spin_unlock_irqrestore(&wdtpci_lock, flags);
*temperature = (c * 11 / 15) + 7;
return 0;
}
@@ -282,17 +317,25 @@ static irqreturn_t wdtpci_interrupt(int irq, void *dev_id)
* Read the status register see what is up and
* then printk it.
*/
- unsigned char status=inb_p(WDT_SR);
+ unsigned char status;
+
+ spin_lock(&wdtpci_lock);
+
+ status = inb(WDT_SR);
+ udelay(8);
printk(KERN_CRIT PFX "status %d\n", status);
#ifdef CONFIG_WDT_501_PCI
- if (!(status & WDC_SR_TGOOD))
- printk(KERN_CRIT PFX "Overheat alarm.(%d)\n",inb_p(WDT_RT));
+ if (!(status & WDC_SR_TGOOD)) {
+ u8 alarm = inb(WDT_RT);
+ printk(KERN_CRIT PFX "Overheat alarm.(%d)\n", alarm);
+ udelay(8);
+ }
if (!(status & WDC_SR_PSUOVER))
- printk(KERN_CRIT PFX "PSU over voltage.\n");
+ printk(KERN_CRIT PFX "PSU over voltage.\n");
if (!(status & WDC_SR_PSUUNDR))
- printk(KERN_CRIT PFX "PSU under voltage.\n");
+ printk(KERN_CRIT PFX "PSU under voltage.\n");
if (tachometer) {
if (!(status & WDC_SR_FANGOOD))
printk(KERN_CRIT PFX "Possible fan fault.\n");
@@ -310,6 +353,7 @@ static irqreturn_t wdtpci_interrupt(int irq, void *dev_id)
printk(KERN_CRIT PFX "Reset in 5ms.\n");
#endif
}
+ spin_unlock(&wdtpci_lock);
return IRQ_HANDLED;
}
@@ -325,7 +369,8 @@ static irqreturn_t wdtpci_interrupt(int irq, void *dev_id)
* write of data will do, as we we don't define content meaning.
*/
-static ssize_t wdtpci_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
+static ssize_t wdtpci_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
if (count) {
if (!nowayout) {
@@ -335,7 +380,7 @@ static ssize_t wdtpci_write(struct file *file, const char __user *buf, size_t co
for (i = 0; i != count; i++) {
char c;
- if(get_user(c, buf+i))
+ if (get_user(c, buf+i))
return -EFAULT;
if (c == 'V')
expect_close = 42;
@@ -343,13 +388,11 @@ static ssize_t wdtpci_write(struct file *file, const char __user *buf, size_t co
}
wdtpci_ping();
}
-
return count;
}
/**
* wdtpci_ioctl:
- * @inode: inode of the device
* @file: file handle to the device
* @cmd: watchdog command
* @arg: argument pointer
@@ -359,8 +402,8 @@ static ssize_t wdtpci_write(struct file *file, const char __user *buf, size_t co
* querying capabilities and current status.
*/
-static int wdtpci_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static long wdtpci_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
int new_heartbeat;
int status;
@@ -383,33 +426,29 @@ static int wdtpci_ioctl(struct inode *inode, struct file *file, unsigned int cmd
ident.options |= WDIOF_FANFAULT;
#endif /* CONFIG_WDT_501_PCI */
- switch(cmd)
- {
- default:
- return -ENOTTY;
- case WDIOC_GETSUPPORT:
- return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
-
- case WDIOC_GETSTATUS:
- wdtpci_get_status(&status);
- return put_user(status, p);
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE:
- wdtpci_ping();
- return 0;
- case WDIOC_SETTIMEOUT:
- if (get_user(new_heartbeat, p))
- return -EFAULT;
-
- if (wdtpci_set_heartbeat(new_heartbeat))
- return -EINVAL;
-
- wdtpci_ping();
- /* Fall */
- case WDIOC_GETTIMEOUT:
- return put_user(heartbeat, p);
- }
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
+ case WDIOC_GETSTATUS:
+ wdtpci_get_status(&status);
+ return put_user(status, p);
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, p);
+ case WDIOC_KEEPALIVE:
+ wdtpci_ping();
+ return 0;
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_heartbeat, p))
+ return -EFAULT;
+ if (wdtpci_set_heartbeat(new_heartbeat))
+ return -EINVAL;
+ wdtpci_ping();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(heartbeat, p);
+ }
}
/**
@@ -426,12 +465,11 @@ static int wdtpci_ioctl(struct inode *inode, struct file *file, unsigned int cmd
static int wdtpci_open(struct inode *inode, struct file *file)
{
- if (down_trylock(&open_sem))
+ if (test_and_set_bit(0, &open_lock))
return -EBUSY;
- if (nowayout) {
+ if (nowayout)
__module_get(THIS_MODULE);
- }
/*
* Activate
*/
@@ -460,7 +498,7 @@ static int wdtpci_release(struct inode *inode, struct file *file)
wdtpci_ping();
}
expect_close = 0;
- up(&open_sem);
+ clear_bit(0, &open_lock);
return 0;
}
@@ -476,14 +514,15 @@ static int wdtpci_release(struct inode *inode, struct file *file)
* fahrenheit. It was designed by an imperial measurement luddite.
*/
-static ssize_t wdtpci_temp_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
+static ssize_t wdtpci_temp_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ptr)
{
int temperature;
if (wdtpci_get_temperature(&temperature))
return -EFAULT;
- if (copy_to_user (buf, &temperature, 1))
+ if (copy_to_user(buf, &temperature, 1))
return -EFAULT;
return 1;
@@ -529,12 +568,10 @@ static int wdtpci_temp_release(struct inode *inode, struct file *file)
*/
static int wdtpci_notify_sys(struct notifier_block *this, unsigned long code,
- void *unused)
+ void *unused)
{
- if (code==SYS_DOWN || code==SYS_HALT) {
- /* Turn the card off */
+ if (code == SYS_DOWN || code == SYS_HALT)
wdtpci_stop();
- }
return NOTIFY_DONE;
}
@@ -547,7 +584,7 @@ static const struct file_operations wdtpci_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = wdtpci_write,
- .ioctl = wdtpci_ioctl,
+ .unlocked_ioctl = wdtpci_ioctl,
.open = wdtpci_open,
.release = wdtpci_release,
};
@@ -584,80 +621,85 @@ static struct notifier_block wdtpci_notifier = {
};
-static int __devinit wdtpci_init_one (struct pci_dev *dev,
- const struct pci_device_id *ent)
+static int __devinit wdtpci_init_one(struct pci_dev *dev,
+ const struct pci_device_id *ent)
{
int ret = -EIO;
dev_count++;
if (dev_count > 1) {
- printk (KERN_ERR PFX "this driver only supports 1 device\n");
+ printk(KERN_ERR PFX "This driver only supports one device\n");
return -ENODEV;
}
- if (pci_enable_device (dev)) {
- printk (KERN_ERR PFX "Not possible to enable PCI Device\n");
+ if (pci_enable_device(dev)) {
+ printk(KERN_ERR PFX "Not possible to enable PCI Device\n");
return -ENODEV;
}
- if (pci_resource_start (dev, 2) == 0x0000) {
- printk (KERN_ERR PFX "No I/O-Address for card detected\n");
+ if (pci_resource_start(dev, 2) == 0x0000) {
+ printk(KERN_ERR PFX "No I/O-Address for card detected\n");
ret = -ENODEV;
goto out_pci;
}
- sema_init(&open_sem, 1);
-
irq = dev->irq;
- io = pci_resource_start (dev, 2);
+ io = pci_resource_start(dev, 2);
- if (request_region (io, 16, "wdt_pci") == NULL) {
- printk (KERN_ERR PFX "I/O address 0x%04x already in use\n", io);
+ if (request_region(io, 16, "wdt_pci") == NULL) {
+ printk(KERN_ERR PFX "I/O address 0x%04x already in use\n", io);
goto out_pci;
}
- if (request_irq (irq, wdtpci_interrupt, IRQF_DISABLED | IRQF_SHARED,
+ if (request_irq(irq, wdtpci_interrupt, IRQF_DISABLED | IRQF_SHARED,
"wdt_pci", &wdtpci_miscdev)) {
- printk (KERN_ERR PFX "IRQ %d is not free\n", irq);
+ printk(KERN_ERR PFX "IRQ %d is not free\n", irq);
goto out_reg;
}
- printk ("PCI-WDT500/501 (PCI-WDG-CSM) driver 0.10 at 0x%04x (Interrupt %d)\n",
- io, irq);
+ printk(KERN_INFO
+ "PCI-WDT500/501 (PCI-WDG-CSM) driver 0.10 at 0x%04x (Interrupt %d)\n",
+ io, irq);
- /* Check that the heartbeat value is within it's range ; if not reset to the default */
+ /* Check that the heartbeat value is within its range;
+ if not reset to the default */
if (wdtpci_set_heartbeat(heartbeat)) {
wdtpci_set_heartbeat(WD_TIMO);
- printk(KERN_INFO PFX "heartbeat value must be 0<heartbeat<65536, using %d\n",
- WD_TIMO);
+ printk(KERN_INFO PFX
+ "heartbeat value must be 0 < heartbeat < 65536, using %d\n",
+ WD_TIMO);
}
- ret = register_reboot_notifier (&wdtpci_notifier);
+ ret = register_reboot_notifier(&wdtpci_notifier);
if (ret) {
- printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", ret);
+ printk(KERN_ERR PFX
+ "cannot register reboot notifier (err=%d)\n", ret);
goto out_irq;
}
#ifdef CONFIG_WDT_501_PCI
- ret = misc_register (&temp_miscdev);
+ ret = misc_register(&temp_miscdev);
if (ret) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- TEMP_MINOR, ret);
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ TEMP_MINOR, ret);
goto out_rbt;
}
#endif /* CONFIG_WDT_501_PCI */
- ret = misc_register (&wdtpci_miscdev);
+ ret = misc_register(&wdtpci_miscdev);
if (ret) {
- printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
- WATCHDOG_MINOR, ret);
+ printk(KERN_ERR PFX
+ "cannot register miscdev on minor=%d (err=%d)\n",
+ WATCHDOG_MINOR, ret);
goto out_misc;
}
printk(KERN_INFO PFX "initialized. heartbeat=%d sec (nowayout=%d)\n",
heartbeat, nowayout);
#ifdef CONFIG_WDT_501_PCI
- printk(KERN_INFO "wdt: Fan Tachometer is %s\n", (tachometer ? "Enabled" : "Disabled"));
+ printk(KERN_INFO "wdt: Fan Tachometer is %s\n",
+ (tachometer ? "Enabled" : "Disabled"));
#endif /* CONFIG_WDT_501_PCI */
ret = 0;
@@ -673,14 +715,14 @@ out_rbt:
out_irq:
free_irq(irq, &wdtpci_miscdev);
out_reg:
- release_region (io, 16);
+ release_region(io, 16);
out_pci:
pci_disable_device(dev);
goto out;
}
-static void __devexit wdtpci_remove_one (struct pci_dev *pdev)
+static void __devexit wdtpci_remove_one(struct pci_dev *pdev)
{
/* here we assume only one device will ever have
* been picked up and registered by probe function */
@@ -728,7 +770,7 @@ static struct pci_driver wdtpci_driver = {
static void __exit wdtpci_cleanup(void)
{
- pci_unregister_driver (&wdtpci_driver);
+ pci_unregister_driver(&wdtpci_driver);
}
@@ -742,7 +784,7 @@ static void __exit wdtpci_cleanup(void)
static int __init wdtpci_init(void)
{
- return pci_register_driver (&wdtpci_driver);
+ return pci_register_driver(&wdtpci_driver);
}
^ permalink raw reply related [flat|nested] 72+ messages in thread* Re: [PATCH 00/57] watchdog: Giant scrub
2008-05-19 13:04 [PATCH 00/57] watchdog: Giant scrub Alan Cox
` (56 preceding siblings ...)
2008-05-19 13:10 ` [PATCH 57/57] wdt501/pci: Clean " Alan Cox
@ 2008-05-19 18:21 ` Andrew Morton
2008-05-19 19:51 ` Alan Cox
2008-05-20 8:01 ` Wim Van Sebroeck
57 siblings, 2 replies; 72+ messages in thread
From: Andrew Morton @ 2008-05-19 18:21 UTC (permalink / raw)
To: Alan Cox; +Cc: linux-kernel, wim
On Mon, 19 May 2008 14:04:40 +0100 Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> drivers/watchdog/acquirewdt.c | 119 ++++-----
> drivers/watchdog/advantechwdt.c | 133 ++++------
> drivers/watchdog/alim1535_wdt.c | 186 +++++++------
> drivers/watchdog/alim7101_wdt.c | 224 +++++++++-------
> drivers/watchdog/ar7_wdt.c | 29 +-
> drivers/watchdog/at32ap700x_wdt.c | 7 -
> drivers/watchdog/at91rm9200_wdt.c | 108 ++++----
> drivers/watchdog/bfin_wdt.c | 147 +++++------
> drivers/watchdog/booke_wdt.c | 57 ++--
> drivers/watchdog/cpu5wdt.c | 144 +++++-----
> drivers/watchdog/davinci_wdt.c | 11 -
> drivers/watchdog/ep93xx_wdt.c | 17 +
> drivers/watchdog/eurotechwdt.c | 57 +++-
> drivers/watchdog/hpwdt.c | 4
> drivers/watchdog/i6300esb.c | 342 ++++++++++++-------------
> drivers/watchdog/iTCO_vendor.h | 15 +
> drivers/watchdog/iTCO_vendor_support.c | 53 ++--
> drivers/watchdog/iTCO_wdt.c | 294 ++++++++++-----------
> drivers/watchdog/ib700wdt.c | 103 ++++---
> drivers/watchdog/ibmasr.c | 149 ++++++-----
> drivers/watchdog/indydog.c | 114 ++++----
> drivers/watchdog/iop_wdt.c | 46 ++-
> drivers/watchdog/it8712f_wdt.c | 77 ++----
> drivers/watchdog/ixp2000_wdt.c | 50 ++--
> drivers/watchdog/ixp4xx_wdt.c | 41 +--
> drivers/watchdog/ks8695_wdt.c | 119 ++++-----
> drivers/watchdog/machzwd.c | 108 +++-----
> drivers/watchdog/mixcomwd.c | 133 +++++-----
> drivers/watchdog/mpc5200_wdt.c | 20 +
> drivers/watchdog/mpc83xx_wdt.c | 19 +
> drivers/watchdog/mpc8xx_wdt.c | 37 +--
> drivers/watchdog/mpcore_wdt.c | 53 ++--
> drivers/watchdog/mtx-1_wdt.c | 107 ++++----
> drivers/watchdog/mv64x60_wdt.c | 20 +
> drivers/watchdog/omap_wdt.c | 35 ++-
> drivers/watchdog/pc87413_wdt.c | 211 ++++++---------
> drivers/watchdog/pcwd.c | 179 +++++++------
> drivers/watchdog/pnx4008_wdt.c | 18 +
> drivers/watchdog/rm9k_wdt.c | 21 +-
> drivers/watchdog/s3c2410_wdt.c | 148 ++++++-----
> drivers/watchdog/sa1100_wdt.c | 32 +-
> drivers/watchdog/sb_wdog.c | 78 +++---
> drivers/watchdog/sbc60xxwdt.c | 223 ++++++++--------
> drivers/watchdog/sbc7240_wdt.c | 16 +
> drivers/watchdog/sbc8360.c | 30 +-
> drivers/watchdog/sbc_epx_c3.c | 12 -
> drivers/watchdog/sc1200wdt.c | 203 ++++++++-------
> drivers/watchdog/sc520_wdt.c | 163 ++++++------
> drivers/watchdog/scx200_wdt.c | 59 ++--
> drivers/watchdog/shwdt.c | 139 ++++++----
> drivers/watchdog/smsc37b787_wdt.c | 442 ++++++++++++++++----------------
> drivers/watchdog/softdog.c | 87 +++---
> drivers/watchdog/txx9wdt.c | 31 +-
> drivers/watchdog/w83627hf_wdt.c | 175 ++++++-------
> drivers/watchdog/w83697hf_wdt.c | 141 +++++-----
> drivers/watchdog/w83877f_wdt.c | 199 +++++++-------
> drivers/watchdog/w83977f_wdt.c | 225 ++++++++--------
> drivers/watchdog/wafer5823wdt.c | 80 +++---
> drivers/watchdog/wdrtas.c | 103 +++----
> drivers/watchdog/wdt.c | 176 +++++++------
> drivers/watchdog/wdt285.c | 31 +-
> drivers/watchdog/wdt977.c | 148 +++++------
> drivers/watchdog/wdt_pci.c | 300 ++++++++++++----------
> 65 files changed, 3479 insertions(+), 3396 deletions(-)
eek.
This comes at a time when git-watchdog has
drivers/watchdog/Kconfig | 38 +++-
drivers/watchdog/Makefile | 5 +
drivers/watchdog/bfin_wdt.c | 111 +++++---
drivers/watchdog/core/Kconfig | 33 +++
drivers/watchdog/core/Makefile | 7 +
drivers/watchdog/core/watchdog_core.c | 200 ++++++++++++++
drivers/watchdog/core/watchdog_dev.c | 465 +++++++++++++++++++++++++++++++++
drivers/watchdog/geodewdt.c | 309 ++++++++++++++++++++++
drivers/watchdog/hpwdt.c | 27 +-
drivers/watchdog/iTCO_wdt.c | 247 +++++-------------
drivers/watchdog/it8712f_wdt.c | 21 ++
drivers/watchdog/rc32434_wdt.c | 344 ++++++++++++++++++++++++
drivers/watchdog/rdc321x_wdt.c | 285 ++++++++++++++++++++
drivers/watchdog/w83697hf_wdt.c | 38 +++-
include/linux/watchdog.h | 49 ++++
15 files changed, 1934 insertions(+), 245 deletions(-)
and hasn't had a commit in six weeks, missed the merge window and the
most recent commit is titled "[WATCHDOG] rc32434_wdt: critical
bugfixes".
Wim, come back!
(Happily there appears to be little overlap between the two diffstats there)
^ permalink raw reply [flat|nested] 72+ messages in thread* Re: [PATCH 00/57] watchdog: Giant scrub
2008-05-19 18:21 ` [PATCH 00/57] watchdog: Giant scrub Andrew Morton
@ 2008-05-19 19:51 ` Alan Cox
2008-05-20 8:01 ` Wim Van Sebroeck
1 sibling, 0 replies; 72+ messages in thread
From: Alan Cox @ 2008-05-19 19:51 UTC (permalink / raw)
To: Andrew Morton; +Cc: linux-kernel, wim
> and hasn't had a commit in six weeks, missed the merge window and the
> most recent commit is titled "[WATCHDOG] rc32434_wdt: critical
> bugfixes".
>
> Wim, come back!
>
> (Happily there appears to be little overlap between the two diffstats there)
If Wim wants I'll start folding them all together into one tree.
Alan
^ permalink raw reply [flat|nested] 72+ messages in thread
* Re: [PATCH 00/57] watchdog: Giant scrub
2008-05-19 18:21 ` [PATCH 00/57] watchdog: Giant scrub Andrew Morton
2008-05-19 19:51 ` Alan Cox
@ 2008-05-20 8:01 ` Wim Van Sebroeck
2008-05-20 8:37 ` Andrew Morton
1 sibling, 1 reply; 72+ messages in thread
From: Wim Van Sebroeck @ 2008-05-20 8:01 UTC (permalink / raw)
To: Andrew Morton; +Cc: Alan Cox, linux-kernel
Hi Andrew,
> eek.
>
> This comes at a time when git-watchdog has
>
> and hasn't had a commit in six weeks, missed the merge window and the
> most recent commit is titled "[WATCHDOG] rc32434_wdt: critical
> bugfixes".
>
> Wim, come back!
>
> (Happily there appears to be little overlap between the two diffstats there)
Sorry guys, I had to do electricity, ... for the new house. I have to finish
still one thing tonight and then things should be normal again for a few weeks.
I indeed have some backlog, but Alan's patches seems rather straight forward.
I'll merge them in the linux-watchdog-mm tree as soon as possible (but i'll first
sent some watchdog patches over to linus because I seemed to have missed allready
2 rc releases :-( ).
Greetings,
Wim.
^ permalink raw reply [flat|nested] 72+ messages in thread
* Re: [PATCH 00/57] watchdog: Giant scrub
2008-05-20 8:01 ` Wim Van Sebroeck
@ 2008-05-20 8:37 ` Andrew Morton
2008-05-20 15:34 ` Wim Van Sebroeck
0 siblings, 1 reply; 72+ messages in thread
From: Andrew Morton @ 2008-05-20 8:37 UTC (permalink / raw)
To: Wim Van Sebroeck; +Cc: Alan Cox, linux-kernel
On Tue, 20 May 2008 10:01:10 +0200 Wim Van Sebroeck <wim@iguana.be> wrote:
> Hi Andrew,
>
> > eek.
> >
> > This comes at a time when git-watchdog has
> >
> > and hasn't had a commit in six weeks, missed the merge window and the
> > most recent commit is titled "[WATCHDOG] rc32434_wdt: critical
> > bugfixes".
> >
> > Wim, come back!
> >
> > (Happily there appears to be little overlap between the two diffstats there)
>
> Sorry guys, I had to do electricity, ... for the new house. I have to finish
> still one thing tonight and then things should be normal again for a few weeks.
> I indeed have some backlog, but Alan's patches seems rather straight forward.
> I'll merge them in the linux-watchdog-mm tree as soon as possible (but i'll first
> sent some watchdog patches over to linus because I seemed to have missed allready
> 2 rc releases :-( ).
Thanks, no probs. Linus may get grumpy, but he hopefully doesn't know
where you live ;)
Please do take a look at the itco_wdt-ich9do-support.patch and
watchdog-fix-booke_wdtc-on-mpc85xx-smp-system.patch which I just
resent. And we need to work out what to do about the Rusty problem,
which is also a linux-next problem.
^ permalink raw reply [flat|nested] 72+ messages in thread
* Re: [PATCH 00/57] watchdog: Giant scrub
2008-05-20 8:37 ` Andrew Morton
@ 2008-05-20 15:34 ` Wim Van Sebroeck
0 siblings, 0 replies; 72+ messages in thread
From: Wim Van Sebroeck @ 2008-05-20 15:34 UTC (permalink / raw)
To: Andrew Morton; +Cc: Alan Cox, linux-kernel
Hi Andrew,
> Thanks, no probs. Linus may get grumpy, but he hopefully doesn't know
> where you live ;)
He definitely knows which country, but indeed not exactly where :-)
So I'll survive. My wive and children however, do know where I live and they
want to be able to move end of this summer, so it's obvious what to choose :-)
Greetings,
Wim.
^ permalink raw reply [flat|nested] 72+ messages in thread