media: omap3isp: Check for valid port in endpoints

Check that we do have a valid port in an endpoint, return an error if not.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Tested-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/platform/omap3isp/isp.c

@@ -2080,7 +2080,7 @@ static int isp_fwnode_parse(struct device *dev, struct fwnode_handle *fwnode,
 	default:
 		dev_warn(dev, "%s: invalid interface %u\n",
 			 to_of_node(fwnode)->full_name, vep.base.port);
-		break;
+		return -EINVAL;
 	}
 
 	return 0;