From: Xu Chun Guang <xuchunguang@espressif.com>
Date: Wed, 14 Sep 2016 08:14:50 +0000 (+0800)
Subject: dhcpserver: Fix crash when switching wifi mode
X-Git-Tag: v0.9~43^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=064d2b4ecbc6a3fbdb1c76049dd159e6673243af;p=esp-idf

dhcpserver: Fix crash when switching wifi mode

See Teamwork 7058.
---

diff --git a/components/lwip/apps/dhcpserver.c b/components/lwip/apps/dhcpserver.c
index ca0592c917..4cdef4123d 100644
--- a/components/lwip/apps/dhcpserver.c
+++ b/components/lwip/apps/dhcpserver.c
@@ -1070,9 +1070,8 @@ void dhcps_stop(struct netif *netif)
         return;
     }
 
-    udp_disconnect(pcb_dhcps);
-
     if (apnetif->dhcps_pcb != NULL) {
+        udp_disconnect(apnetif->dhcps_pcb);
         udp_remove(apnetif->dhcps_pcb);
         apnetif->dhcps_pcb = NULL;
     }