[PATCH AUTOSEL 3.18 15/29] media: s3c-camif: ignore -ENOIOCTLCMD from v4l2_subdev_call for s_power

[Sasha Levin]

From: Akinobu Mita <akinobu.m...@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.verk...@cisco.com>
Signed-off-by: Akinobu Mita <akinobu.m...@gmail.com>
Acked-by: Sylwester Nawrocki <sylvester.nawro...@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+sams...@kernel.org>
Signed-off-by: Sasha Levin <alexander.le...@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 97a52d4574e7..bb4a57e55aed 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