[PATCH 31/57] pc87413_wdt: clean up, coding style, unlocked_ioctl

Alan Cox
2008-05-19T13:30:09Z

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) ")");