IB/core: Set hop limit in ib_init_ah_from_wc correctly

The hop_limit value in the ah_attr should be 0xFF, not the value read
from the received GRH (which should be 0).  See 13.5.4.4 in the 1.2 IB
spec.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 8b5dd36..ccdf93d 100644 (file)
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -167,7 +167,7 @@ int ib_init_ah_from_wc(struct ib_device *device, u8 port_num, struct ib_wc *wc,
                ah_attr->grh.sgid_index = (u8) gid_index;
                flow_class = be32_to_cpu(grh->version_tclass_flow);
                ah_attr->grh.flow_label = flow_class & 0xFFFFF;
-               ah_attr->grh.hop_limit = grh->hop_limit;
+               ah_attr->grh.hop_limit = 0xFF;
                ah_attr->grh.traffic_class = (flow_class >> 20) & 0xFF;
        }
        return 0;