route: Use ipv4_mtu instead of raw rt_pmtu
authorHerbert Xu <herbert@gondor.apana.org.au>
Tue, 28 Apr 2015 03:43:15 +0000 (11:43 +0800)
committerDavid S. Miller <davem@davemloft.net>
Wed, 29 Apr 2015 18:43:22 +0000 (14:43 -0400)
commitcb6ccf09d6b94bec4def1ac5cf4678d12b216474
treedb344aebfcff1eb32f1421b60ca3c011f7bd7cb1
parent39376ccb1968ba9f83e2a880a8bf02ad5dea44e1
route: Use ipv4_mtu instead of raw rt_pmtu

The commit 3cdaa5be9e81a914e633a6be7b7d2ef75b528562 ("ipv4: Don't
increase PMTU with Datagram Too Big message") broke PMTU in cases
where the rt_pmtu value has expired but is smaller than the new
PMTU value.

This obsolete rt_pmtu then prevents the new PMTU value from being
installed.

Fixes: 3cdaa5be9e81 ("ipv4: Don't increase PMTU with Datagram Too Big message")
Reported-by: Gerd v. Egidy <gerd.von.egidy@intra2net.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/route.c