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[v2,01/22] media: Enforce single entity->pipe in a pipeline

Message ID 1448824823-10372-2-git-send-email-sakari.ailus@iki.fi (mailing list archive)
State New, archived
Headers show

Commit Message

Sakari Ailus Nov. 29, 2015, 7:20 p.m. UTC 
If a different entity->pipe in a pipeline was encountered, a warning was
issued but the execution continued as if nothing had happened. Return an
error instead right there.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/media/media-entity.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
index 66b8db0..d11f440 100644
--- a/drivers/media/media-entity.c
+++ b/drivers/media/media-entity.c
@@ -431,7 +431,12 @@  __must_check int media_entity_pipeline_start(struct media_entity *entity,
 		DECLARE_BITMAP(has_no_links, MEDIA_ENTITY_MAX_PADS);
 
 		entity->stream_count++;
-		WARN_ON(entity->pipe && entity->pipe != pipe);
+
+		if (WARN_ON(entity->pipe && entity->pipe != pipe)) {
+			ret = -EBUSY;
+			goto error;
+		}
+
 		entity->pipe = pipe;
 
 		/* Already streaming --- no need to check. */