When the subdevice doesn't provide s_power core ops callback, the v4l2_subdev_call for s_power returns -ENOIOCTLCMD. If the subdevice doesn't have the special handling for its power saving mode, the s_power isn't required. So -ENOIOCTLCMD from the v4l2_subdev_call should be ignored. Cc: Sylwester Nawrocki <sylvester.nawrocki@xxxxxxxxx> Cc: Hans Verkuil <hans.verkuil@xxxxxxxxx> Cc: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx> Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx> Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx> --- drivers/media/platform/s3c-camif/camif-capture.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/media/platform/s3c-camif/camif-capture.c b/drivers/media/platform/s3c-camif/camif-capture.c index 9ab8e7e..b1d9f38 100644 --- a/drivers/media/platform/s3c-camif/camif-capture.c +++ b/drivers/media/platform/s3c-camif/camif-capture.c @@ -117,6 +117,8 @@ static int sensor_set_power(struct camif_dev *camif, int on) if (camif->sensor.power_count == !on) err = v4l2_subdev_call(sensor->sd, core, s_power, on); + if (err == -ENOIOCTLCMD) + err = 0; if (!err) sensor->power_count += on ? 1 : -1; -- 2.7.4
