diff --git a/target/linux/cns3xxx/patches-3.3/420-ethernet_optimize_rx_offload.patch b/target/linux/cns3xxx/patches-3.3/420-ethernet_optimize_rx_offload.patch
new file mode 100644
index 000000000..67929ef89
--- /dev/null
+++ b/target/linux/cns3xxx/patches-3.3/420-ethernet_optimize_rx_offload.patch
@@ -0,0 +1,27 @@
+--- 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;
+ 		}