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authorRui Miguel Silva <rui.silva@linaro.org>2018-11-21 05:59:55 -0500
committerMauro Carvalho Chehab <mchehab+samsung@kernel.org>2018-11-23 05:16:29 -0500
commitc45fbdf24c61a7b7a37f1b3bbd46f054637a3627 (patch)
tree1dbc6cf0c4f30d6340d10b742b133169effe3723
parent5f229dcabc4acfb4e233e7678569f0fb9ab9c469 (diff)
media: ov2680: fix null dereference at power on
Swapping the order between v4l2 subdevice registration and checking chip id in b7a417628abf ("media: ov2680: don't register the v4l2 subdevice before checking chip ID") makes the mode restore to use the sensor controls before they are set, so move the mode restore call to s_power after the handler setup for controls is done. This remove also the need for the error code path in power on function. Fixes: b7a417628abf ("media: ov2680: don't register the v4l2 subdevice before checking chip ID") Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
-rw-r--r--drivers/media/i2c/ov2680.c12
1 files changed, 2 insertions, 10 deletions
diff --git a/drivers/media/i2c/ov2680.c b/drivers/media/i2c/ov2680.c
index 0e34e15b67b3..b10bcfabaeeb 100644
--- a/drivers/media/i2c/ov2680.c
+++ b/drivers/media/i2c/ov2680.c
@@ -568,10 +568,6 @@ static int ov2680_power_on(struct ov2680_dev *sensor)
if (ret < 0)
return ret;
- ret = ov2680_mode_restore(sensor);
- if (ret < 0)
- goto disable;
-
sensor->is_enabled = true;
/* Set clock lane into LP-11 state */
@@ -580,12 +576,6 @@ static int ov2680_power_on(struct ov2680_dev *sensor)
ov2680_stream_disable(sensor);
return 0;
-
-disable:
- dev_err(dev, "failed to enable sensor: %d\n", ret);
- ov2680_power_off(sensor);
-
- return ret;
}
static int ov2680_s_power(struct v4l2_subdev *sd, int on)
@@ -606,6 +596,8 @@ static int ov2680_s_power(struct v4l2_subdev *sd, int on)
ret = v4l2_ctrl_handler_setup(&sensor->ctrls.handler);
if (ret < 0)
return ret;
+
+ ret = ov2680_mode_restore(sensor);
}
return ret;