[media] media-entity: unregister entity links

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>

diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
index 1b2fd72..ceae708 100644 (file)
--- a/drivers/media/media-entity.c
+++ b/drivers/media/media-entity.c
@@ -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);

diff --git a/include/media/media-entity.h b/include/media/media-entity.h
index f905860..0753f30 100644 (file)
--- a/include/media/media-entity.h
+++ b/include/media/media-entity.h
@@ -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) ?                  \