IB/mlx4: Use correct SL on AH query under RoCE

The mlx4 IB driver implementation for ib_query_ah used a wrong offset
(28 instead of 29) when link type is Ethernet. Fixed to use the correct one.

Fixes: fa417f7b520e ('IB/mlx4: Add support for IBoE')
Signed-off-by: Shani Michaeli <shanim@mellanox.com>
Signed-off-by: Noa Osherovich <noaos@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/mlx4/ah.c b/drivers/infiniband/hw/mlx4/ah.c
index 7ad6f9679c40f0879b1b8b57df9aed68e75c9907..1688a17de4fe1fc6d887d74d703b51dffaff2e08 100644 (file)
--- a/drivers/infiniband/hw/mlx4/ah.c
+++ b/drivers/infiniband/hw/mlx4/ah.c
@@ -148,9 +148,13 @@ int mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr)
        enum rdma_link_layer ll;
 
        memset(ah_attr, 0, sizeof *ah_attr);
-       ah_attr->sl = be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
        ah_attr->port_num = be32_to_cpu(ah->av.ib.port_pd) >> 24;
        ll = rdma_port_get_link_layer(ibah->device, ah_attr->port_num);
+       if (ll == IB_LINK_LAYER_ETHERNET)
+               ah_attr->sl = be32_to_cpu(ah->av.eth.sl_tclass_flowlabel) >> 29;
+       else
+               ah_attr->sl = be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28;
+
        ah_attr->dlid = ll == IB_LINK_LAYER_INFINIBAND ? be16_to_cpu(ah->av.ib.dlid) : 0;
        if (ah->av.ib.stat_rate)
                ah_attr->static_rate = ah->av.ib.stat_rate - MLX4_STAT_RATE_OFFSET;