[12/13,drivers/media] changed ioctls to unlocked

Commit Message

Stoyan Gaydarov March 24, 2009, 9:12 p.m. UTC

From: Stoyan Gaydarov <[e-mail]>

Signed-off-by: Stoyan Gaydarov <[e-mail]>
---
 drivers/media/dvb/bt8xx/dst_ca.c |    7 +++++--
 drivers/media/video/dabusb.c     |   11 ++++++++---
 2 files changed, 13 insertions(+), 5 deletions(-)

Comments

Alan Cox March 24, 2009, 9:24 p.m. UTC | #1

> -static int dabusb_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
> +static long dabusb_ioctl (struct file *file, unsigned int cmd, unsigned long arg)
>  {
> +	lock_kernel();
>  	pdabusb_t s = (pdabusb_t) file->private_data;

After the variables or you'll get lots of warnings from gcc

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Stoyan Gaydarov March 24, 2009, 9:31 p.m. UTC | #2

On Tue, Mar 24, 2009 at 4:24 PM, Alan Cox <[e-mail]> wrote:
>
>> -static int dabusb_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
>> +static long dabusb_ioctl (struct file *file, unsigned int cmd, unsigned long arg)
>>  {
>> +     lock_kernel();
>>       pdabusb_t s = (pdabusb_t) file->private_data;
>
> After the variables or you'll get lots of warnings from gcc
>
>

Unfortunately I am not familiar with this driver and as such i was not
sure if the variable required the lock to be accessed or not so as to
play it safe i put it before the variable. But i can resubmit this
patch if there are no problems.

Patch

diff --git a/drivers/media/dvb/bt8xx/dst_ca.c b/drivers/media/dvb/bt8xx/dst_ca.c
index 0258451..d3487c5 100644
--- a/drivers/media/dvb/bt8xx/dst_ca.c
+++ b/drivers/media/dvb/bt8xx/dst_ca.c
@@ -552,8 +552,10 @@  free_mem_and_exit:
 	return result;
 }
 
-static int dst_ca_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long ioctl_arg)
+static long dst_ca_ioctl(struct file *file, unsigned int cmd, unsigned long ioctl_arg)
 {
+	lock_kernel();
+
 	struct dvb_device* dvbdev = (struct dvb_device*) file->private_data;
 	struct dst_state* state = (struct dst_state*) dvbdev->priv;
 	struct ca_slot_info *p_ca_slot_info;
@@ -647,6 +649,7 @@  static int dst_ca_ioctl(struct inode *inode, struct file *file, unsigned int cmd
 	kfree (p_ca_slot_info);
 	kfree (p_ca_caps);
 
+	unlock_kernel();
 	return result;
 }
 
@@ -684,7 +687,7 @@  static ssize_t dst_ca_write(struct file *file, const char __user *buffer, size_t
 
 static struct file_operations dst_ca_fops = {
 	.owner = THIS_MODULE,
-	.ioctl = dst_ca_ioctl,
+	.unlocked_ioctl = dst_ca_ioctl,
 	.open = dst_ca_open,
 	.release = dst_ca_release,
 	.read = dst_ca_read,
diff --git a/drivers/media/video/dabusb.c b/drivers/media/video/dabusb.c
index 298810d..ae4cd79 100644
--- a/drivers/media/video/dabusb.c
+++ b/drivers/media/video/dabusb.c
@@ -657,8 +657,9 @@  static int dabusb_release (struct inode *inode, struct file *file)
 	return 0;
 }
 
-static int dabusb_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+static long dabusb_ioctl (struct file *file, unsigned int cmd, unsigned long arg)
 {
+	lock_kernel();
 	pdabusb_t s = (pdabusb_t) file->private_data;
 	pbulk_transfer_t pbulk;
 	int ret = 0;
@@ -666,13 +667,16 @@  static int dabusb_ioctl (struct inode *inode, struct file *file, unsigned int cm
 
 	dbg("dabusb_ioctl");
 
-	if (s->remove_pending)
+	if (s->remove_pending) {
+		unlock_kernel();
 		return -EIO;
+	}
 
 	mutex_lock(&s->mutex);
 
 	if (!s->usbdev) {
 		mutex_unlock(&s->mutex);
+		unlock_kernel();
 		return -EIO;
 	}
 
@@ -713,6 +717,7 @@  static int dabusb_ioctl (struct inode *inode, struct file *file, unsigned int cm
 		break;
 	}
 	mutex_unlock(&s->mutex);
+	unlock_kernel();
 	return ret;
 }
 
@@ -721,7 +726,7 @@  static const struct file_operations dabusb_fops =
 	.owner =	THIS_MODULE,
 	.llseek =	no_llseek,
 	.read =		dabusb_read,
-	.ioctl =	dabusb_ioctl,
+	.unlocked_ioctl =	dabusb_ioctl,
 	.open =		dabusb_open,
 	.release =	dabusb_release,
 };