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[media] V4L: cosmetic clean up 

Improve the use of the WARN_ON() macro and use a local variable, instead
of reduntantly dereferencing a pointer in v4l2-dev.c

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Guennadi Liakhovetski 2011-12-06 05:33:03 -03:00 committed by Mauro Carvalho Chehab
parent 885f3cad98
commit 1fc2b5f7fb
1 changed files with 4 additions and 6 deletions
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10
drivers/media/video/v4l2-dev.c
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@ -146,10 +146,9 @@ static void v4l2_device_release(struct device *cd)
struct v4l2_device *v4l2_dev = vdev->v4l2_dev;
mutex_lock(&videodev_lock);
if (video_device[vdev->minor] != vdev) {
mutex_unlock(&videodev_lock);
if (WARN_ON(video_device[vdev->minor] != vdev)) {
/* should not happen */
WARN_ON(1);
mutex_unlock(&videodev_lock);
return;
}
@ -168,7 +167,7 @@ static void v4l2_device_release(struct device *cd)
mutex_unlock(&videodev_lock);
#if defined(CONFIG_MEDIA_CONTROLLER)
if (vdev->v4l2_dev && vdev->v4l2_dev->mdev &&
if (v4l2_dev && v4l2_dev->mdev &&
vdev->vfl_type != VFL_TYPE_SUBDEV)
media_device_unregister_entity(&vdev->entity);
#endif
@ -556,8 +555,7 @@ int __video_register_device(struct video_device *vdev, int type, int nr,
vdev->minor = -1;
/* the release callback MUST be present */
WARN_ON(!vdev->release);
if (!vdev->release)
if (WARN_ON(!vdev->release))
return -EINVAL;
/* v4l2_fh support */