From: Ursula Braun <ursula.braun@de.ibm.com>
Date: Sun, 24 Oct 2010 23:06:43 +0000 (+0000)
Subject: ipv6: fix refcnt problem related to POSTDAD state
X-Git-Tag: v2.6.37-rc1~88^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=853dc2e03ddd0c49885ed55c48755d2b1073122a;p=pandora-kernel.git

ipv6: fix refcnt problem related to POSTDAD state

After running this bonding setup script
    modprobe bonding miimon=100 mode=0 max_bonds=1
    ifconfig bond0 10.1.1.1/16
    ifenslave bond0 eth1
    ifenslave bond0 eth3
on s390 with qeth-driven slaves, modprobe -r fails with this message
    unregister_netdevice: waiting for bond0 to become free. Usage count = 1
due to twice detection of duplicate address.
Problem is caused by a missing decrease of ifp->refcnt in addrconf_dad_failure.
An extra call of in6_ifa_put(ifp) solves it.
Problem has been introduced with commit f2344a131bccdbfc5338e17fa71a807dee7944fa.

Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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