From: Jim Paris <jim@jtan.com>
Date: Fri, 1 Feb 2008 00:36:25 +0000 (-0800)
Subject: [IPV6]: Update MSS even if MTU is unchanged.
X-Git-Tag: v2.6.25-rc1~1089^2~27
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=23717795bee15470b96f9b7aa5ecf4efe14c8e32;p=pandora-kernel.git

[IPV6]: Update MSS even if MTU is unchanged.

This is needed because in ndisc.c, we have:

  static void ndisc_router_discovery(struct sk_buff *skb)
  {
  // ...
  	if (ndopts.nd_opts_mtu) {
  // ...
  			if (rt)
  				rt->u.dst.metrics[RTAX_MTU-1] = mtu;

  			rt6_mtu_change(skb->dev, mtu);
  // ...
  }

Since the mtu is set directly here, rt6_mtu_change_route thinks that
it is unchanged, and so it fails to update the MSS accordingly.  This
patch lets rt6_mtu_change_route still update MSS if old_mtu == new_mtu.

Signed-off-by: Jim Paris <jim@jtan.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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