From 4f53c68b3b7729642a328b0d79a20efdc85b4e6d Mon Sep 17 00:00:00 2001
From: David Lin <linpeng1577@gmail.com>
Date: Wed, 10 Jun 2020 11:09:11 +0800
Subject: [PATCH] Update ethernetif.c

---
 components/net/lwip-2.1.0/src/netif/ethernetif.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/components/net/lwip-2.1.0/src/netif/ethernetif.c b/components/net/lwip-2.1.0/src/netif/ethernetif.c
index 55ffaa89df..23d7180f66 100755
--- a/components/net/lwip-2.1.0/src/netif/ethernetif.c
+++ b/components/net/lwip-2.1.0/src/netif/ethernetif.c
@@ -499,7 +499,11 @@ rt_err_t eth_device_init_with_flag(struct eth_device *dev, const char *name, rt_
         rt_kprintf("malloc netif failed\n");
         return -RT_ERROR;
     }
+#if LWIP_NETIF_HOSTNAME
+    rt_memset(netif, 0, sizeof(struct netif) + LWIP_HOSTNAME_LEN);	
+#else
     rt_memset(netif, 0, sizeof(struct netif));
+#endif
 
     /* set netif */
     dev->netif = netif;