netdev - [PATCH] ipv6: keep existing flags when setting IFA_F

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Date:	Fri,  4 Dec 2015 14:15:08 +0100
From:	Bjørn Mork <bjorn@...k.no>
To:	netdev@...r.kernel.org
Cc:	Bjørn Mork <bjorn@...k.no>,
	Erik Kline <ek@...gle.com>,
	Fernando Gont <fgont@...networks.com>,
	Lorenzo Colitti <lorenzo@...gle.com>,
	YOSHIFUJI Hideaki/吉藤英明 
	<hideaki.yoshifuji@...aclelinux.com>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>
Subject: [PATCH] ipv6: keep existing flags when setting IFA_F_OPTIMISTIC

Commit 64236f3f3d74 ("ipv6: introduce IFA_F_STABLE_PRIVACY flag")
failed to update the setting of the IFA_F_OPTIMISTIC flag, causing
the IFA_F_STABLE_PRIVACY flag to be lost if IFA_F_OPTIMISTIC is set.

Cc: Erik Kline <ek@...gle.com>
Cc: Fernando Gont <fgont@...networks.com>
Cc: Lorenzo Colitti <lorenzo@...gle.com>
Cc: YOSHIFUJI Hideaki/吉藤英明 <hideaki.yoshifuji@...aclelinux.com>
Cc: Hannes Frederic Sowa <hannes@...essinduktion.org>
Fixes: 64236f3f3d74 ("ipv6: introduce IFA_F_STABLE_PRIVACY flag")
Signed-off-by: Bjørn Mork <bjorn@...k.no>
---
 net/ipv6/addrconf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index b5cc81a18521..b3465bbbcd82 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2463,7 +2463,7 @@ ok:
 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
 			if (in6_dev->cnf.optimistic_dad &&
 			    !net->ipv6.devconf_all->forwarding && sllao)
-				addr_flags = IFA_F_OPTIMISTIC;
+				addr_flags |= IFA_F_OPTIMISTIC;
 #endif
 
 			/* Do not allow to create too much of autoconfigured
-- 
2.1.4

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