From: zhang kai <zhangkaiheb@126.com>
Date: Wed, 2 Jun 2021 01:50:39 +0000 (+0800)
Subject: sit: replace 68 with micro IPV4_MIN_MTU
X-Git-Tag: v5.14-rc1~119^2~371
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7f0e869c4e3902abc44ae6a9c9fc4fba6867408e;p=thirdparty%2Fkernel%2Flinux.git

sit: replace 68 with micro IPV4_MIN_MTU

Use meaningfull micro IPV4_MIN_MTU

Signed-off-by: zhang kai <zhangkaiheb@126.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index aa98294a3ad31..71b57bdb1519b 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -970,7 +970,7 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
 	if (df) {
 		mtu = dst_mtu(&rt->dst) - t_hlen;
 
-		if (mtu < 68) {
+		if (mtu < IPV4_MIN_MTU) {
 			dev->stats.collisions++;
 			ip_rt_put(rt);
 			goto tx_error;