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    Subject[PATCH AUTOSEL 4.4 25/43] media: s3c-camif: ignore -ENOIOCTLCMD from v4l2_subdev_call for s_power
    Date
    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>
    ---
    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 fa6af4a7dae1..f97f4bc22ced 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;

    --
    2.17.1
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