diff --git a/components/net/lwip-1.4.1/src/netif/ethernetif.c b/components/net/lwip-1.4.1/src/netif/ethernetif.c
index f0b2f814dc..f0c28ecf06 100644
--- a/components/net/lwip-1.4.1/src/netif/ethernetif.c
+++ b/components/net/lwip-1.4.1/src/netif/ethernetif.c
@@ -367,6 +367,8 @@ static void eth_rx_thread_entry(void* parameter)
             /* receive all of buffer */
             while (1)
             {
+            	if(device->eth_rx == RT_NULL) break;
+            	
                 p = device->eth_rx(&(device->parent));
                 if (p != RT_NULL)
                 {