media: mc: Fix graph walk in media_pipeline_start
The graph walk tries to follow all links, even if they are not between
pads. This causes a crash with, e.g. a MEDIA_LNK_FL_ANCILLARY_LINK link.
Fix this by allowing the walk to proceed only for MEDIA_LNK_FL_DATA_LINK
links.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Cc: stable@vger.kernel.org # for 6.1 and later
Fixes: ae21987283
("media: mc: entity: Rewrite media_pipeline_start()")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
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@ -619,6 +619,12 @@ static int media_pipeline_explore_next_link(struct media_pipeline *pipe,
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link = list_entry(entry->links, typeof(*link), list);
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last_link = media_pipeline_walk_pop(walk);
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if ((link->flags & MEDIA_LNK_FL_LINK_TYPE) != MEDIA_LNK_FL_DATA_LINK) {
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dev_dbg(walk->mdev->dev,
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"media pipeline: skipping link (not data-link)\n");
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return 0;
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}
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dev_dbg(walk->mdev->dev,
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"media pipeline: exploring link '%s':%u -> '%s':%u\n",
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link->source->entity->name, link->source->index,
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