netdev - [PATCH] sit: replace 68 with micro IPV4_MIN

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Date:   Wed,  2 Jun 2021 09:50:39 +0800
From:   zhang kai <zhangkaiheb@....com>
To:     davem@...emloft.net, yoshfuji@...ux-ipv6.org, dsahern@...nel.org,
        kuba@...nel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     zhang kai <zhangkaiheb@....com>
Subject: [PATCH] sit: replace 68 with micro IPV4_MIN_MTU

Use meaningfull micro IPV4_MIN_MTU

Signed-off-by: zhang kai <zhangkaiheb@....com>
---
 net/ipv6/sit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index aa98294a3..71b57bdb1 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;
-- 
2.17.1