[PATCH v2 1/6] media: entity: Skip non-data links in graph iteration

[Daniel Scally <djrscally@gmail.com>]

When iterating over the media graph, don't follow links that are not
data links.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Scally <djrscally@gmail.com>
---

Changes since v1:

	- Moved to the head of the series
	- s/pad-to-pad/data (Sakari)
	- Dropped the debug message (Laurent)

Changes since the rfc:

	- new patch

 drivers/media/mc/mc-entity.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/media/mc/mc-entity.c b/drivers/media/mc/mc-entity.c
index f40f41977142..2a6e16fb0048 100644
--- a/drivers/media/mc/mc-entity.c
+++ b/drivers/media/mc/mc-entity.c
@@ -313,6 +313,12 @@ static void media_graph_walk_iter(struct media_graph *graph)
 
 	link = list_entry(link_top(graph), typeof(*link), list);
 
+	/* If the link is not a data link, don't follow it */
+	if ((link->flags & MEDIA_LNK_FL_LINK_TYPE) != MEDIA_LNK_FL_DATA_LINK) {
+		link_top(graph) = link_top(graph)->next;
+		return;
+	}
+
 	/* The link is not enabled so we do not follow. */
 	if (!(link->flags & MEDIA_LNK_FL_ENABLED)) {
 		link_top(graph) = link_top(graph)->next;
-- 
2.25.1