[media] v4l: mt9t001: fix clean up in case of power-on failures

If the driver fails to reset the camera or to set up control handlers, it
has to power the camera back off.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/i2c/mt9t001.c

@@ -233,10 +233,21 @@ static int __mt9t001_set_power(struct mt9t001 *mt9t001, bool on)
 	ret = mt9t001_reset(mt9t001);
 	if (ret < 0) {
 		dev_err(&client->dev, "Failed to reset the camera\n");
-		return ret;
+		goto e_power;
 	}
 
-	return v4l2_ctrl_handler_setup(&mt9t001->ctrls);
+	ret = v4l2_ctrl_handler_setup(&mt9t001->ctrls);
+	if (ret < 0) {
+		dev_err(&client->dev, "Failed to set up control handlers\n");
+		goto e_power;
+	}
+
+	return 0;
+
+e_power:
+	mt9t001_power_off(mt9t001);
+
+	return ret;
 }
 
 /* -----------------------------------------------------------------------------