--- a/drivers/net/ethernet/cavium/cns3xxx_eth.c
+++ b/drivers/net/ethernet/cavium/cns3xxx_eth.c
@@ -653,17 +653,17 @@ static int eth_poll(struct napi_struct *
 				case 6:
 				case 13:
 				case 14:
-					if (desc->l4f)
+					if (!desc->l4f) {
+						skb->ip_summed = CHECKSUM_UNNECESSARY;
+						napi_gro_receive(napi, skb);
 						break;
-
-					skb->ip_summed = CHECKSUM_UNNECESSARY;
-					break;
+					}
+					/* fall through */
 				default:
-				break;
+					netif_receive_skb(skb);
+					break;
 			}
 
-			napi_gro_receive(napi, skb);
-
 			sw->frag_first = NULL;
 			sw->frag_last = NULL;
 		}
