[PATCH] cm4000_cs: Switch to unlocked_ioctl

Alan Cox
2008-05-22T21:31:07Z

Gack....

Signed-off-by: Alan Cox <alan@redhat.com>

diff --git a/drivers/char/pcmcia/cm4000_cs.c b/drivers/char/pcmcia/cm4000_cs.c
index 4a933d4..6b4f78d 100644
--- a/drivers/char/pcmcia/cm4000_cs.c
+++ b/drivers/char/pcmcia/cm4000_cs.c
@@ -32,8 +32,9 @@
#include <linux/fs.h>
#include <linux/delay.h>
#include <linux/bitrev.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+#include <linux/smp_lock.h>

#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
@@ -1405,11 +1406,11 @@ static void stop_monitor(struct cm4000_dev *dev)
DEBUGP(3, dev, "<- stop_monitor\n");
}

-static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
- unsigned long arg)
+static long cmm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct cm4000_dev *dev = filp->private_data;
unsigned int iobase = dev->p_dev->io.BasePort1;
+ struct inode *inode = filp->f_path.dentry->d_inode;
struct pcmcia_device *link;
int size;
int rc;
@@ -1426,38 +1427,42 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
DEBUGP(3, dev, "cmm_ioctl(device=%d.%d) %s\n", imajor(inode),
iminor(inode), ioctl_names[_IOC_NR(cmd)]);

+ lock_kernel();
+ rc = -ENODEV;
link = dev_table[iminor(inode)];
if (!pcmcia_dev_present(link)) {
DEBUGP(4, dev, "DEV_OK false\n");
- return -ENODEV;
+ goto out;
}

if (test_bit(IS_CMM_ABSENT, &dev->flags)) {
DEBUGP(4, dev, "CMM_ABSENT flag set\n");
- return -ENODEV;
+ goto out;
}
+ rc = EINVAL;

if (_IOC_TYPE(cmd) != CM_IOC_MAGIC) {
DEBUGP(4, dev, "ioctype mismatch\n");
- return -EINVAL;
+ goto out;
}
if (_IOC_NR(cmd) > CM_IOC_MAXNR) {
DEBUGP(4, dev, "iocnr mismatch\n");
- return -EINVAL;
+ goto out;
}
size = _IOC_SIZE(cmd);
- rc = 0;
+ rc = -EFAULT;
DEBUGP(4, dev, "iocdir=%.4x iocr=%.4x iocw=%.4x iocsize=%d cmd=%.4x\n",
_IOC_DIR(cmd), _IOC_READ, _IOC_WRITE, size, cmd);

if (_IOC_DIR(cmd) & _IOC_READ) {
if (!access_ok(VERIFY_WRITE, argp, size))
- return -EFAULT;
+ goto out;
}
if (_IOC_DIR(cmd) & _IOC_WRITE) {
if (!access_ok(VERIFY_READ, argp, size))
- return -EFAULT;
+ goto out;
}
+ rc = 0;

switch (cmd) {
case CM_IOCGSTATUS:
@@ -1477,9 +1482,9 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
if (test_bit(IS_BAD_CARD, &dev->flags))
status |= CM_BAD_CARD;
if (copy_to_user(argp, &status, sizeof(int)))
- return -EFAULT;
+ rc = -EFAULT;
}
- return 0;
+ break;
case CM_IOCGATR:
DEBUGP(4, dev, "... in CM_IOCGATR\n");
{
@@ -1492,25 +1497,29 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
|| (test_bit(IS_ATR_PRESENT, (void *)&dev->flags)
!= 0)))) {
if (filp->f_flags & O_NONBLOCK)
- return -EAGAIN;
- return -ERESTARTSYS;
+ rc = -EAGAIN;
+ else
+ rc = -ERESTARTSYS;
+ break;
}

+ rc = -EFAULT;
if (test_bit(IS_ATR_VALID, &dev->flags) == 0) {
tmp = -1;
if (copy_to_user(&(atreq->atr_len), &tmp,
sizeof(int)))
- return -EFAULT;
+ break;
} else {
if (copy_to_user(atreq->atr, dev->atr,
dev->atr_len))
- return -EFAULT;
+ break;

tmp = dev->atr_len;
if (copy_to_user(&(atreq->atr_len), &tmp, sizeof(int)))
- return -EFAULT;
+ break;
}
- return 0;
+ rc = 0;
+ break;
}
case CM_IOCARDOFF:

@@ -1538,8 +1547,10 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
|| (test_and_set_bit(LOCK_IO, (void *)&dev->flags)
== 0)))) {
if (filp->f_flags & O_NONBLOCK)
- return -EAGAIN;
- return -ERESTARTSYS;
+ rc = -EAGAIN;
+ else
+ rc = -ERESTARTSYS;
+ break;
}
/* Set Flags0 = 0x42 */
DEBUGP(4, dev, "Set Flags0=0x42 \n");
@@ -1554,8 +1565,10 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
|| (test_bit(IS_ATR_VALID, (void *)&dev->flags) !=
0)))) {
if (filp->f_flags & O_NONBLOCK)
- return -EAGAIN;
- return -ERESTARTSYS;
+ rc = -EAGAIN;
+ else
+ rc = -ERESTARTSYS;
+ break;
}
}
/* release lock */
@@ -1568,8 +1581,10 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
struct ptsreq krnptsreq;

if (copy_from_user(&krnptsreq, argp,
- sizeof(struct ptsreq)))
- return -EFAULT;
+ sizeof(struct ptsreq))) {
+ rc = -EFAULT;
+ break;
+ }

rc = 0;
DEBUGP(4, dev, "... in CM_IOCSPTS\n");
@@ -1580,8 +1595,10 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
|| (test_bit(IS_ATR_PRESENT, (void *)&dev->flags)
!= 0)))) {
if (filp->f_flags & O_NONBLOCK)
- return -EAGAIN;
- return -ERESTARTSYS;
+ rc = -EAGAIN;
+ else
+ rc = -ERESTARTSYS;
+ break;
}
/* get IO lock */
if (wait_event_interruptible
@@ -1590,8 +1607,10 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
|| (test_and_set_bit(LOCK_IO, (void *)&dev->flags)
== 0)))) {
if (filp->f_flags & O_NONBLOCK)
- return -EAGAIN;
- return -ERESTARTSYS;
+ rc = -EAGAIN;
+ else
+ rc = -ERESTARTSYS;
+ break;
}

if ((rc = set_protocol(dev, &krnptsreq)) != 0) {
@@ -1604,7 +1623,7 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
wake_up_interruptible(&dev->ioq);

}
- return rc;
+ break;
#ifdef PCMCIA_DEBUG
case CM_IOSDBGLVL: /* set debug log level */
{
@@ -1612,18 +1631,20 @@ static int cmm_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,

old_pc_debug = pc_debug;
if (copy_from_user(&pc_debug, argp, sizeof(int)))
- return -EFAULT;
-
- if (old_pc_debug != pc_debug)
+ rc = -EFAULT;
+ else if (old_pc_debug != pc_debug)
DEBUGP(0, dev, "Changed debug log level "
"to %i\n", pc_debug);
}
- return rc;
+ break;
#endif
default:
DEBUGP(4, dev, "... in default (unknown IOCTL code)\n");
- return -EINVAL;
+ rc = -ENOTTY;
}
+out:
+ unlock_kernel();
+ return rc;
}

static int cmm_open(struct inode *inode, struct file *filp)
@@ -1897,7 +1918,7 @@ static const struct file_operations cm4000_fops = {
.owner = THIS_MODULE,
.read = cmm_read,
.write = cmm_write,
- .ioctl = cmm_ioctl,
+ .unlocked_ioctl = cmm_ioctl,
.open = cmm_open,
.release= cmm_close,
};