[media] media: use entity.graph_obj.mdev instead of .parent

The struct media_entity has a .parent field that stores a pointer
to the parent struct media_device. But recently a media_gobj was
embedded into the entities and since struct media_gojb already has
a pointer to a struct media_device in the .mdev field, the .parent
field becomes redundant and can be removed.

This patch replaces all the usage of .parent by .graph_obj.mdev so
that field will become unused and can be removed on a later patch.

No functional changes.

The transformation was made using the following coccinelle spatch:

@@
struct media_entity *me;
@@

- me->parent
+ me->graph_obj.mdev

@@
struct media_entity *link;
@@

- link->source->entity->parent
+ link->source->entity->graph_obj.mdev

@@
struct exynos_video_entity *ve;
@@

- ve->vdev.entity.parent
+ ve->vdev.entity.graph_obj.mdev

Suggested-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
index 0f3844470147..138b18416460 100644
--- a/drivers/media/media-device.c
+++ b/drivers/media/media-device.c
@@ -435,8 +435,8 @@ int __must_check media_device_register_entity(struct media_device *mdev,
 	int i;
 
 	/* Warn if we apparently re-register an entity */
-	WARN_ON(entity->parent != NULL);
-	entity->parent = mdev;
+	WARN_ON(entity->graph_obj.mdev != NULL);
+	entity->graph_obj.mdev = mdev;
 
 	spin_lock(&mdev->lock);
 	/* Initialize media_gobj embedded at the entity */
@@ -471,7 +471,7 @@ EXPORT_SYMBOL_GPL(media_device_register_entity);
 void media_device_unregister_entity(struct media_entity *entity)
 {
 	int i;
-	struct media_device *mdev = entity->parent;
+	struct media_device *mdev = entity->graph_obj.mdev;
 
 	if (mdev == NULL)
 		return;
@@ -484,7 +484,7 @@ void media_device_unregister_entity(struct media_entity *entity)
 	media_gobj_remove(&entity->graph_obj);
 	list_del(&entity->list);
 	spin_unlock(&mdev->lock);
-	entity->parent = NULL;
+	entity->graph_obj.mdev = NULL;
 }
 EXPORT_SYMBOL_GPL(media_device_unregister_entity);