[IPV6] IP6TUNNEL: Use update_pmtu() of dst on xmit.

Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

1 files changed, 2 insertions, 5 deletions

diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index 662edb826899..08d944223ec8 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -727,11 +727,8 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
         }
         if (mtu < IPV6_MIN_MTU)
                 mtu = IPV6_MIN_MTU;
-        if (skb->dst && mtu < dst_mtu(skb->dst)) {
-                struct rt6_info *rt = (struct rt6_info *) skb->dst;
-                rt->rt6i_flags |= RTF_MODIFIED;
-                rt->u.dst.metrics[RTAX_MTU-1] = mtu;
-        }
+        if (skb->dst)
+                skb->dst->ops->update_pmtu(skb->dst, mtu);
         if (skb->len > mtu) {
                 icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, dev);
                 goto tx_err_dst_release;