From: Eric Dumazet <edumazet@google.com>
Date: Fri, 15 Jan 2016 12:56:56 +0000 (-0800)
Subject: ipv6: update skb->csum when CE mark is propagated
X-Git-Tag: v3.2.80~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=58b45f408a8821b6d9f0003c3fdfa179145c90e7;p=pandora-kernel.git

ipv6: update skb->csum when CE mark is propagated

[ Upstream commit 34ae6a1aa0540f0f781dd265366036355fdc8930 ]

When a tunnel decapsulates the outer header, it has to comply
with RFC 6080 and eventually propagate CE mark into inner header.

It turns out IP6_ECN_set_ce() does not correctly update skb->csum
for CHECKSUM_COMPLETE packets, triggering infamous "hw csum failure"
messages and stack traces.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
[bwh: Backported to 3.2:
 - Adjust context
 - Add skb argument to other callers of IP6_ECN_set_ce()]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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