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[media] V4L2: mt9t031: don't Oops if asynchronous probing is attempted 

The mt9t031 driver hasn't yet been updated to support asynchronous
subdevice probing. If such a probing is attempted, the driver is allowed
to fail, but it shouldn't Oops. This patch fixes such a potential NULL
pointer dereference.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Guennadi Liakhovetski 2013-07-30 03:34:06 -03:00 committed by Mauro Carvalho Chehab
parent 4dbfd04075
commit 3d238885db
1 changed files with 5 additions and 2 deletions
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7
drivers/media/i2c/soc_camera/mt9t031.c
View File

@ -594,9 +594,12 @@ static int mt9t031_s_power(struct v4l2_subdev *sd, int on)
ret = soc_camera_power_on(&client->dev, ssdd, mt9t031->clk);
if (ret < 0)
return ret;
vdev->dev.type = &mt9t031_dev_type;
if (vdev)
/* Not needed during probing, when vdev isn't available yet */
vdev->dev.type = &mt9t031_dev_type;
} else {
vdev->dev.type = NULL;
if (vdev)
vdev->dev.type = NULL;
soc_camera_power_off(&client->dev, ssdd, mt9t031->clk);
}