media: mc: Add num_links flag to media_pad
Maintain a counter of the links connected to a pad in the media_pad
structure. This helps checking if a pad is connected to anything, which
will be used in the pipeline building code.
Cc: stable@vger.kernel.org # 6.1
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
diff --git a/drivers/media/mc/mc-entity.c b/drivers/media/mc/mc-entity.c
index 7839e3f..c2d8f59 100644
--- a/drivers/media/mc/mc-entity.c
+++ b/drivers/media/mc/mc-entity.c
@@ -1038,6 +1038,9 @@ static void __media_entity_remove_link(struct media_entity *entity,
/* Remove the reverse links for a data link. */
if ((link->flags & MEDIA_LNK_FL_LINK_TYPE) == MEDIA_LNK_FL_DATA_LINK) {
+ link->source->num_links--;
+ link->sink->num_links--;
+
if (link->source->entity == entity)
remote = link->sink->entity;
else
@@ -1143,6 +1146,9 @@ media_create_pad_link(struct media_entity *source, u16 source_pad,
sink->num_links++;
source->num_links++;
+ link->source->num_links++;
+ link->sink->num_links++;
+
return 0;
}
EXPORT_SYMBOL_GPL(media_create_pad_link);
