From 070e449690b5a13991c3cd1ac250e893a0186430 Mon Sep 17 00:00:00 2001
From: Joel Cunningham <joel.cunningham@me.com>
Date: Fri, 27 Apr 2018 16:54:01 -0500
Subject: [PATCH] loopif: disable checksums

This disable checksum generation and checking for the loopback netif
when LWIP_CHECKSUM_CTRL_PER_NETIF is enabled

Checksums are not needed for the loopback adapter and this will increase
performance for loopback communication
---
 src/core/netif.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/core/netif.c b/src/core/netif.c
index 1d668e27..9033b46c 100644
--- a/src/core/netif.c
+++ b/src/core/netif.c
@@ -166,6 +166,7 @@ netif_loopif_init(struct netif *netif)
 #if LWIP_LOOPIF_MULTICAST
   netif_set_flags(netif, NETIF_FLAG_IGMP);
 #endif
+  NETIF_SET_CHECKSUM_CTRL(netif, NETIF_CHECKSUM_DISABLE_ALL);
   return ERR_OK;
 }
 #endif /* LWIP_HAVE_LOOPIF */