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media: mc-entity.c: use WARN_ON, validate link pads

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Use WARN_ON instead of BUG_ON.

Add two new WARN_ONs to verify that the source pad is really a source
and that the sink pad is really a sink.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil-cisco@xs4all.nl: use ! instead of == NULL for source and sink]
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Hans Verkuil 2020-02-04 19:13:13 +01:00 committed by Mauro Carvalho Chehab
parent 0c9d29eb1c
commit a3fbc2e6bb
1 changed files with 8 additions and 3 deletions
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11
drivers/media/mc/mc-entity.c
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@ -662,9 +662,14 @@ media_create_pad_link(struct media_entity *source, u16 source_pad,
struct media_link *link;
struct media_link *backlink;
BUG_ON(source == NULL || sink == NULL);
BUG_ON(source_pad >= source->num_pads);
BUG_ON(sink_pad >= sink->num_pads);
if (WARN_ON(!source || !sink) ||
WARN_ON(source_pad >= source->num_pads) ||
WARN_ON(sink_pad >= sink->num_pads))
return -EINVAL;
if (WARN_ON(!(source->pads[source_pad].flags & MEDIA_PAD_FL_SOURCE)))
return -EINVAL;
if (WARN_ON(!(sink->pads[sink_pad].flags & MEDIA_PAD_FL_SINK)))
return -EINVAL;
link = media_add_link(&source->links);
if (link == NULL)