From 72297c59f7188d12f24daee1877e7dcca787cf1f Mon Sep 17 00:00:00 2001
From: Tom Herbert <therbert@google.com>
Date: Sun, 31 Aug 2014 15:12:46 -0700
Subject: l2tp: Enable checksum unnecessary conversions for l2tp/UDP sockets

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/l2tp/l2tp_core.c b/net/l2tp/l2tp_core.c
index 1109d3b..797c0af 100644
--- a/net/l2tp/l2tp_core.c
+++ b/net/l2tp/l2tp_core.c
@@ -1392,6 +1392,8 @@ static int l2tp_tunnel_sock_create(struct net *net,
 		if (err < 0)
 			goto out;
 
+		udp_set_convert_csum(sock->sk, true);
+
 		break;
 
 	case L2TP_ENCAPTYPE_IP:
-- 
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