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[media] V4L: Remove all links of the media entity when unregistering subdev

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Remove all links of the subdev's media entity after internal_ops
'unregistered' call and right before unregistering the entity from
a media device.
It is assumed here that an unregistered (orphan) media entity cannot
have links to other entities registered to a media device.
It is also assumed the media links should be created/removed with
the media graph's mutex held.
The above implies that the caller of v4l2_device_unregister_subdev()
must not hold the graph's mutex.

Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sylwester Nawrocki 2013-05-09 08:29:33 -03:00 committed by Mauro Carvalho Chehab
parent 7349cec14d
commit c2efd3e6e0
1 changed files with 3 additions and 1 deletions
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4
drivers/media/v4l2-core/v4l2-device.c
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@ -269,8 +269,10 @@ void v4l2_device_unregister_subdev(struct v4l2_subdev *sd)
sd->v4l2_dev = NULL;
#if defined(CONFIG_MEDIA_CONTROLLER)
if (v4l2_dev->mdev)
if (v4l2_dev->mdev) {
media_entity_remove_links(&sd->entity);
media_device_unregister_entity(&sd->entity);
}
#endif
video_unregister_device(sd->devnode);
module_put(sd->owner);