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: NBenoit Parrot <bparrot@ti.com>
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Tested-by: NBenoit Parrot <bparrot@ti.com>
Acked-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>