On 04/11/2011 04:26 PM, Laurent Pinchart wrote:
> Subdevs already have their own entity, don't register as second one when
> registering the subdev device node.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
> drivers/media/video/v4l2-dev.c | 15 ++++++++++-----
> 1 files changed, 10 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c
> index 498e674..6dc7196 100644
> --- a/drivers/media/video/v4l2-dev.c
> +++ b/drivers/media/video/v4l2-dev.c
> @@ -389,7 +389,8 @@ static int v4l2_open(struct inode *inode, struct file *filp)
> video_get(vdev);
> mutex_unlock(&videodev_lock);
> #if defined(CONFIG_MEDIA_CONTROLLER)
> - if (vdev->v4l2_dev && vdev->v4l2_dev->mdev) {
> + if (vdev->v4l2_dev && vdev->v4l2_dev->mdev &&
> + vdev->vfl_type != VFL_TYPE_SUBDEV) {
> entity = media_entity_get(&vdev->entity);
> if (!entity) {
> ret = -EBUSY;
> @@ -415,7 +416,8 @@ err:
> /* decrease the refcount in case of an error */
> if (ret) {
> #if defined(CONFIG_MEDIA_CONTROLLER)
> - if (vdev->v4l2_dev && vdev->v4l2_dev->mdev)
> + if (vdev->v4l2_dev && vdev->v4l2_dev->mdev &&
> + vdev->vfl_type != VFL_TYPE_SUBDEV)
> media_entity_put(entity);
> #endif
> video_put(vdev);
> @@ -437,7 +439,8 @@ static int v4l2_release(struct inode *inode, struct file *filp)
> mutex_unlock(vdev->lock);
> }
> #if defined(CONFIG_MEDIA_CONTROLLER)
> - if (vdev->v4l2_dev && vdev->v4l2_dev->mdev)
> + if (vdev->v4l2_dev && vdev->v4l2_dev->mdev &&
> + vdev->vfl_type != VFL_TYPE_SUBDEV)
> media_entity_put(&vdev->entity);
> #endif
> /* decrease the refcount unconditionally since the release()
> @@ -686,7 +689,8 @@ int __video_register_device(struct video_device *vdev, int type, int nr,
>
> #if defined(CONFIG_MEDIA_CONTROLLER)
> /* Part 5: Register the entity. */
> - if (vdev->v4l2_dev && vdev->v4l2_dev->mdev) {
> + if (vdev->v4l2_dev && vdev->v4l2_dev->mdev &&
> + vdev->vfl_type != VFL_TYPE_SUBDEV) {
> vdev->entity.type = MEDIA_ENT_T_DEVNODE_V4L;
> vdev->entity.name = vdev->name;
> vdev->entity.v4l.major = VIDEO_MAJOR;
> @@ -733,7 +737,8 @@ void video_unregister_device(struct video_device *vdev)
> return;
>
> #if defined(CONFIG_MEDIA_CONTROLLER)
> - if (vdev->v4l2_dev && vdev->v4l2_dev->mdev)
> + if (vdev->v4l2_dev && vdev->v4l2_dev->mdev &&
> + vdev->vfl_type != VFL_TYPE_SUBDEV)
> media_device_unregister_entity(&vdev->entity);
> #endif
>
Hi Laurent,
If v4l2_subdev has a 'struct media_entity' inside of its 'struct
video_device' member, why does it need a media_entity of its own?
Shouldn't we eliminate v4l2_subdev.entity and always just use
v4l2_subdev.devnode.entity where it is needed? Or do they have 2
different purposes?
-Michael
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