diff options
Diffstat (limited to 'drivers/media/video/v4l2-dev.c')
| -rw-r--r-- | drivers/media/video/v4l2-dev.c | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c index c2122e5..b827781 100644 --- a/drivers/media/video/v4l2-dev.c +++ b/drivers/media/video/v4l2-dev.c @@ -348,20 +348,14 @@ static long v4l2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) int ret = -ENODEV; if (vdev->fops->unlocked_ioctl) { - bool locked = false; + struct mutex *lock = v4l2_ioctl_get_lock(vdev, cmd); - if (vdev->lock) { - /* always lock unless the cmd is marked as "don't use lock" */ - locked = !v4l2_is_known_ioctl(cmd) || - !test_bit(_IOC_NR(cmd), vdev->disable_locking); - - if (locked && mutex_lock_interruptible(vdev->lock)) - return -ERESTARTSYS; - } + if (lock && mutex_lock_interruptible(lock)) + return -ERESTARTSYS; if (video_is_registered(vdev)) ret = vdev->fops->unlocked_ioctl(filp, cmd, arg); - if (locked) - mutex_unlock(vdev->lock); + if (lock) + mutex_unlock(lock); } else if (vdev->fops->ioctl) { /* This code path is a replacement for the BKL. It is a major * hack but it will have to do for those drivers that are not |
