From: Miaohe Lin <linmiaohe@huawei.com>
Date: Sat, 29 Aug 2020 09:09:18 +0000 (-0400)
Subject: net: Use helper macro IP_MAX_MTU in __ip_append_data()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=cbc08a33126f8f721d30cf9034c4d444b55de60a;p=linux.git

net: Use helper macro IP_MAX_MTU in __ip_append_data()

What 0xFFFF means here is actually the max mtu of a ip packet. Use help
macro IP_MAX_MTU here.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 329a0ab875426..f0f234727547a 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -996,7 +996,7 @@ static int __ip_append_data(struct sock *sk,
 
 	fragheaderlen = sizeof(struct iphdr) + (opt ? opt->optlen : 0);
 	maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen;
-	maxnonfragsize = ip_sk_ignore_df(sk) ? 0xFFFF : mtu;
+	maxnonfragsize = ip_sk_ignore_df(sk) ? IP_MAX_MTU : mtu;
 
 	if (cork->length + length > maxnonfragsize - fragheaderlen) {
 		ip_local_error(sk, EMSGSIZE, fl4->daddr, inet->inet_dport,