From: Heiner Kallweit <heiner.kallweit@web.de>
Date: Wed, 12 Mar 2014 21:13:19 +0000 (+0100)
Subject: ipv6: Avoid unnecessary temporary addresses being generated
X-Git-Tag: v3.2.58~90
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=49ff127930d7c4a3e4b3f163af77e8ad0cda63b0;p=pandora-kernel.git

ipv6: Avoid unnecessary temporary addresses being generated

[ Upstream commit ecab67015ef6e3f3635551dcc9971cf363cc1cd5 ]

tmp_prefered_lft is an offset to ifp->tstamp, not now. Therefore
age needs to be added to the condition.

Age calculation in ipv6_create_tempaddr is different from the one
in addrconf_verify and doesn't consider ADDRCONF_TIMER_FUZZ_MINUS.
This can cause age in ipv6_create_tempaddr to be less than the one
in addrconf_verify and therefore unnecessary temporary address to
be generated.
Use age calculation as in addrconf_modify to avoid this.

Signed-off-by: Heiner Kallweit <heiner.kallweit@web.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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