[media] ov7670: call v4l2_async_register_subdev

Add v4l2-async support for this driver.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/i2c/ov7670.c

@@ -1636,10 +1636,9 @@ static int ov7670_probe(struct i2c_client *client,
 			V4L2_EXPOSURE_AUTO);
 	sd->ctrl_handler = &info->hdl;
 	if (info->hdl.error) {
-		int err = info->hdl.error;
+		ret = info->hdl.error;
 
-		v4l2_ctrl_handler_free(&info->hdl);
-		return err;
+		goto hdl_free;
 	}
 	/*
 	 * We have checked empirically that hw allows to read back the gain
@@ -1651,7 +1650,15 @@ static int ov7670_probe(struct i2c_client *client,
 	v4l2_ctrl_cluster(2, &info->saturation);
 	v4l2_ctrl_handler_setup(&info->hdl);
 
+	ret = v4l2_async_register_subdev(&info->sd);
+	if (ret < 0)
+		goto hdl_free;
+
 	return 0;
+
+hdl_free:
+	v4l2_ctrl_handler_free(&info->hdl);
+	return ret;
 }