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[media] media-entity: unregister entity links

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Add functions to explicitly unregister all entity links.
This function is called automatically when an entity
link is destroyed.

Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Mauro Carvalho Chehab 2015-08-24 08:46:46 -03:00
parent 8309f47c32
commit 7c4696a910
2 changed files with 26 additions and 0 deletions
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23
drivers/media/media-entity.c
View File

@ -891,6 +891,7 @@ EXPORT_SYMBOL_GPL(media_devnode_create);
void media_devnode_remove(struct media_intf_devnode *devnode)
{
media_remove_intf_links(&devnode->intf);
media_gobj_remove(&devnode->intf.graph_obj);
kfree(devnode);
}
@ -932,3 +933,25 @@ void media_remove_intf_link(struct media_link *link)
mutex_unlock(&link->graph_obj.mdev->graph_mutex);
}
EXPORT_SYMBOL_GPL(media_remove_intf_link);
void __media_remove_intf_links(struct media_interface *intf)
{
struct media_link *link, *tmp;
list_for_each_entry_safe(link, tmp, &intf->links, list)
__media_remove_intf_link(link);
}
EXPORT_SYMBOL_GPL(__media_remove_intf_links);
void media_remove_intf_links(struct media_interface *intf)
{
/* Do nothing if the intf is not registered. */
if (intf->graph_obj.mdev == NULL)
return;
mutex_lock(&intf->graph_obj.mdev->graph_mutex);
__media_remove_intf_links(intf);
mutex_unlock(&intf->graph_obj.mdev->graph_mutex);
}
EXPORT_SYMBOL_GPL(media_remove_intf_links);

3
include/media/media-entity.h
View File

@ -326,6 +326,9 @@ struct media_link *media_create_intf_link(struct media_entity *entity,
struct media_interface *intf,
u32 flags);
void media_remove_intf_link(struct media_link *link);
void __media_remove_intf_links(struct media_interface *intf);
void media_remove_intf_links(struct media_interface *intf);
#define media_entity_call(entity, operation, args...) \
(((entity)->ops && (entity)->ops->operation) ? \