[media] media: Improve documentation for link_setup/link_modify
Those callbacks are called with the media_device.graph_mutex held.
Add a note about that, as the code called by those notifiers should
not be touching in the mutex.
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
diff --git a/include/media/media-device.h b/include/media/media-device.h
index b21ef24..a9b33c4 100644
--- a/include/media/media-device.h
+++ b/include/media/media-device.h
@@ -311,7 +311,8 @@
* @enable_source: Enable Source Handler function pointer
* @disable_source: Disable Source Handler function pointer
*
- * @link_notify: Link state change notification callback
+ * @link_notify: Link state change notification callback. This callback is
+ * called with the graph_mutex held.
*
* This structure represents an abstract high-level media device. It allows easy
* access to entities and provides basic media device-level support. The
diff --git a/include/media/media-entity.h b/include/media/media-entity.h
index e0295ee..cbb266f 100644
--- a/include/media/media-entity.h
+++ b/include/media/media-entity.h
@@ -179,6 +179,9 @@
* @link_validate: Return whether a link is valid from the entity point of
* view. The media_entity_pipeline_start() function
* validates all links by calling this operation. Optional.
+ *
+ * Note: Those these callbacks are called with struct media_device.@graph_mutex
+ * mutex held.
*/
struct media_entity_operations {
int (*link_setup)(struct media_entity *entity,