After sub-dev registration in v4l2_async_test_notify(), the v4l2-async core calls the registered_async callback but if a sub-dev driver does not implement it, v4l2_subdev_call() will return a -ENOIOCTLCMD which should not be considered an error.
Reported-by: Benoit Parrot <bpar...@ti.com> Signed-off-by: Javier Martinez Canillas <jav...@osg.samsung.com> --- Changes in v2: - Check the return of v4l2_subdev_call (Benoit). drivers/media/v4l2-core/v4l2-async.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c index 716bfd47daab..a4b224d92572 100644 --- a/drivers/media/v4l2-core/v4l2-async.c +++ b/drivers/media/v4l2-core/v4l2-async.c @@ -120,7 +120,7 @@ static int v4l2_async_test_notify(struct v4l2_async_notifier *notifier, } ret = v4l2_subdev_call(sd, core, registered_async); - if (ret < 0) { + if (ret < 0 && ret != -ENOIOCTLCMD) { if (notifier->unbind) notifier->unbind(notifier, sd, asd); return ret; -- 2.5.0