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| author | Hans Verkuil <hans.verkuil@cisco.com> | 2012-06-22 07:29:35 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-07-06 17:30:54 -0300 |
| commit | 5a5adf6b669cf1a3dd2af419cd68a4c491f384a3 (patch) | |
| tree | 42b1c4709c3c5cca04fb15bd369e6ae4921645d4 /drivers/media/video/v4l2-dev.c | |
| parent | 5d44f5e3e388739f017a74e73dab2a995673915f (diff) | |
| download | op-kernel-dev-5a5adf6b669cf1a3dd2af419cd68a4c491f384a3.zip op-kernel-dev-5a5adf6b669cf1a3dd2af419cd68a4c491f384a3.tar.gz | |
[media] v4l2-dev/ioctl.c: add vb2_queue support to video_device
This prepares struct video_device for easier integration with vb2.
It also introduces a new lock that protects the vb2_queue. It is up
to the driver to use it or not. And the driver can associate an owner
filehandle with the queue to check whether queuing requests are
permitted for the calling filehandle.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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 |
