target/linux/bcm27xx/patches-5.15/950-0767-media-entity-Skip-non-data-links-in-graph-iteration.patch

   1 From 74a4bd2caa37f07786cdf3e86ad9f7cbc6977b31 Mon Sep 17 00:00:00 2001
   2 From: Daniel Scally <djrscally@gmail.com>
   3 Date: Wed, 2 Mar 2022 22:03:00 +0000
   4 Subject: [PATCH] media: entity: Skip non-data links in graph iteration
   5
   6 When iterating over the media graph, don't follow links that are not
   7 data links.
   8
   9 Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
  10 Signed-off-by: Daniel Scally <djrscally@gmail.com>
  11 ---
  12  drivers/media/mc/mc-entity.c | 6 ++++++
  13  1 file changed, 6 insertions(+)
  14
  15 --- a/drivers/media/mc/mc-entity.c
  16 +++ b/drivers/media/mc/mc-entity.c
  17 @@ -313,6 +313,12 @@ static void media_graph_walk_iter(struct
  18
  19         link = list_entry(link_top(graph), typeof(*link), list);
  20
  21 +       /* If the link is not a data link, don't follow it */
  22 +       if ((link->flags & MEDIA_LNK_FL_LINK_TYPE) != MEDIA_LNK_FL_DATA_LINK) {
  23 +               link_top(graph) = link_top(graph)->next;
  24 +               return;
  25 +       }
  26 +
  27         /* The link is not enabled so we do not follow. */
  28         if (!(link->flags & MEDIA_LNK_FL_ENABLED)) {
  29                 link_top(graph) = link_top(graph)->next;