[PATCH net] mpls: fix clearing of dead nh_flags on link up

[Roopa Prabhu]

From: Roopa Prabhu <ro...@cumulusnetworks.com>

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: 39eb8cd17588 ("net: mpls: rt_nhn_alive and nh_flags should be accessed 
using READ_ONCE")
Reported-by: Satish Ashok <sas...@cumulusnetworks.com>
Signed-off-by: Roopa Prabhu <ro...@cumulusnetworks.com>
---
 net/mpls/af_mpls.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c
index 94b3317..b51582d 100644
--- a/net/mpls/af_mpls.c
+++ b/net/mpls/af_mpls.c
@@ -1483,7 +1483,7 @@ 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);
-- 
1.9.1