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mpls: fix clearing of dead nh_flags on link up

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recent fixes to use WRITE_ONCE for nh_flags on link up,
accidently ended up leaving the deadflags on a nh. This patch
fixes the WRITE_ONCE to use freshly evaluated nh_flags.

Fixes: 39eb8cd175 ("net: mpls: rt_nhn_alive and nh_flags should be accessed using READ_ONCE")
Reported-by: Satish Ashok <sashok@cumulusnetworks.com>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roopa Prabhu 2017-05-30 23:50:36 -07:00 committed by David S. Miller
parent e8f4ae8543
commit c2e8471d98
1 changed files with 1 additions and 1 deletions
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2
net/mpls/af_mpls.c
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@ -1418,7 +1418,7 @@ static void mpls_ifup(struct net_device *dev, unsigned int flags)
continue;
alive++;
nh_flags &= ~flags;
WRITE_ONCE(nh->nh_flags, flags);
WRITE_ONCE(nh->nh_flags, nh_flags);
} endfor_nexthops(rt);
WRITE_ONCE(rt->rt_nhn_alive, alive);