Commit 8b4510d7 authored by Miaohe Lin's avatar Miaohe Lin Committed by David S. Miller
Browse files

net: gain ipv4 mtu when mtu is not locked 



When mtu is locked, we should not obtain ipv4 mtu as we return immediately
in this case and leave acquired ipv4 mtu unused.

Signed-off-by: default avatarMiaohe Lin <linmiaohe@huawei.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 079f921e

net/ipv4/route.c

+2 −1
Original line number Diff line number Diff line
@@ -1013,13 +1013,14 @@ out: kfree_skb(skb); 
static void __ip_rt_update_pmtu(struct rtable *rt, struct flowi4 *fl4, u32 mtu)

{

	struct dst_entry *dst = &rt->dst;

	u32 old_mtu = ipv4_mtu(dst);

	struct fib_result res;

	bool lock = false;

	u32 old_mtu;



	if (ip_mtu_locked(dst))

		return;



	old_mtu = ipv4_mtu(dst);

	if (old_mtu < mtu)

		return;