[PATCH] net: Use helper macro IP_MAX_MTU in __ip_append_data()

[Miaohe Lin]

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 <linmia...@huawei.com>
---
 net/ipv4/ip_output.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 329a0ab87542..f0f234727547 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,
-- 
2.19.1