From 28855d4fb56f07c233df41b8de1fce5371392de5 Mon Sep 17 00:00:00 2001
From: tangyuxin <462747508@qq.com>
Date: Fri, 3 Nov 2017 11:49:08 +0800
Subject: [PATCH] =?UTF-8?q?[lwip]=E5=88=A4=E5=AE=9Aeth=5Frx=E6=98=AF?=
 =?UTF-8?q?=E5=90=A6=E4=B8=BA=E7=A9=BA,=E4=B8=BA=E7=A9=BA=E4=B8=8D?=
 =?UTF-8?q?=E6=89=A7=E8=A1=8C=E3=80=82?=
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---
 components/net/lwip-2.0.2/src/netif/ethernetif.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/components/net/lwip-2.0.2/src/netif/ethernetif.c b/components/net/lwip-2.0.2/src/netif/ethernetif.c
index 09d6140b16..a2f1be3641 100644
--- a/components/net/lwip-2.0.2/src/netif/ethernetif.c
+++ b/components/net/lwip-2.0.2/src/netif/ethernetif.c
@@ -391,6 +391,8 @@ 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)
                 {
-- 
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