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authorRoland Dreier <roland@purestorage.com>2013-02-25 09:42:15 -0800
committerRoland Dreier <roland@purestorage.com>2013-02-25 09:42:15 -0800
commitf72dd56690aba26fc87fc64e98dd4cc66f27122c (patch)
treed45e0844368ad44e5c4565e3d68b77ee18b92252 /drivers/infiniband
parent5a2815f03c0fd5a091c95af93b7f1a17a971ac20 (diff)
IPoIB: Free ipoib neigh on path record failure so path rec queries are retried
If IPoIB fails to look up a path record (eg if it tries during an SM failover when one SM is dead but the new one hasn't taken over yet), the driver ends up with a neighbour structure but no address handle (AH). There's no mechanism to recover from this: any further packets sent to this destination will be silently dumped in ipoib_start_xmit(). Fix this by freeing the neighbour structures when a path rec query fails, so that the next packet queued to be sent will trigger a new path record query. Signed-off-by: Roland Dreier <roland@purestorage.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/ulp/ipoib/ipoib_main.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index 66d6da90982..8534afd04e7 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -510,6 +510,9 @@ static void path_rec_completion(int status,
spin_unlock_irqrestore(&priv->lock, flags);
+ if (IS_ERR_OR_NULL(ah))
+ ipoib_del_neighs_by_gid(dev, path->pathrec.dgid.raw);
+
if (old_ah)
ipoib_put_ah(old_ah);