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media: async: Warn on attept to create an ancillary link to a non-subdev

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Warn if a lens or a flash async sub-device is bound to a non-sub-device
notifier. This isn't meaningful and unlikely to happen in practice but
print a warning as we nevertheless won't consider this an error.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Sakari Ailus
2024-05-20 10:28:20 +03:00
committed by Hans Verkuil
parent 40431ff5a0
commit 7d30b8efae
1 changed files with 5 additions and 1 deletions
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6
drivers/media/v4l2-core/v4l2-async.c
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@@ -323,8 +323,12 @@ static int v4l2_async_create_ancillary_links(struct v4l2_async_notifier *n,
sd->entity.function != MEDIA_ENT_F_FLASH)
return 0;
if (!n->sd)
if (!n->sd) {
dev_warn(notifier_dev(n),
"not a sub-device notifier, not creating an ancillary link for %s!\n",
dev_name(sd->dev));
return 0;
}
link = media_create_ancillary_link(&n->sd->entity, &sd->entity);