From a5fddaecc3ccd03a0e79579a24fe8248f0706c71 Mon Sep 17 00:00:00 2001
From: David Lin <linpeng1577@gmail.com>
Date: Wed, 10 Jun 2020 11:08:01 +0800
Subject: [PATCH] Update ethernetif.c

---
 components/net/lwip-1.4.1/src/netif/ethernetif.c | 4 ++++
 1 file changed, 4 insertions(+)

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 75f86d75d8..85ac09524b 100644
--- a/components/net/lwip-1.4.1/src/netif/ethernetif.c
+++ b/components/net/lwip-1.4.1/src/netif/ethernetif.c
@@ -452,7 +452,11 @@ 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;