4.4-stable review patch. If anyone has any objections, please let me know.
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From: Akinobu Mita akinobu.mita@gmail.com
[ Upstream commit 30ed2b83343bd1e07884ca7355dac70d25ffc158 ]
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: Hans Verkuil hans.verkuil@cisco.com Signed-off-by: Akinobu Mita akinobu.mita@gmail.com Acked-by: Sylwester Nawrocki sylvester.nawrocki@gmail.com Signed-off-by: Sakari Ailus sakari.ailus@linux.intel.com Signed-off-by: Mauro Carvalho Chehab mchehab+samsung@kernel.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/media/platform/s3c-camif/camif-capture.c | 2 ++ 1 file changed, 2 insertions(+)
--- 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
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;