diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c
index 4176216d54be7589a1a84b2d39ce7d803c4d3299..961457ef5a1c1c1e3250fe48214e436c74bb4f45 100644
--- a/drivers/usb/gadget/function/u_serial.c
+++ b/drivers/usb/gadget/function/u_serial.c
@@ -1078,6 +1078,7 @@ static void gs_complete_out(struct usb_ep *ep, struct usb_request *req)
 	default:
 		pr_warn("%s: unexpected %s status %d\n",
 			__func__, ep->name, req->status);
+		/* fall through */
 	case 0:
 		/* normal completion */
 		spin_lock(&info->con_lock);