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The uvc driver relies on the camera firmware to keep the control states and therefore is not capable of changing an inactive control. Allow returning -EACCES in those cases. Signed-off-by: Ricardo Ribalda <ribalda@chromium.org> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>