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media: ov2680: fix null dereference at power on

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Swapping the order between v4l2 subdevice registration and checking chip
id in b7a417628a ("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: b7a417628a ("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>
This commit is contained in:
Rui Miguel Silva 2018-11-21 05:59:55 -05:00 committed by Mauro Carvalho Chehab
parent 5f229dcabc
commit c45fbdf24c
1 changed files with 2 additions and 10 deletions
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12
drivers/media/i2c/ov2680.c
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@ -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;