1 files changed, 10 insertions, 6 deletions

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 1d7d4cf442e3..6298f54b4137 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -511,12 +511,16 @@ int ib_init_ah_from_wc(struct ib_device *device, u8 port_num,
                 ah_attr->grh.dgid = sgid;
 
                 if (!rdma_cap_eth_ah(device, port_num)) {
-                        ret = ib_find_cached_gid_by_port(device, &dgid,
-                                                         IB_GID_TYPE_IB,
-                                                         port_num, NULL,
-                                                         &gid_index);
-                        if (ret)
-                                return ret;
+                        if (dgid.global.interface_id != cpu_to_be64(IB_SA_WELL_KNOWN_GUID)) {
+                                ret = ib_find_cached_gid_by_port(device, &dgid,
+                                                                 IB_GID_TYPE_IB,
+                                                                 port_num, NULL,
+                                                                 &gid_index);
+                                if (ret)
+                                        return ret;
+                        } else {
+                                gid_index = 0;
+                        }
                 }
 
                 ah_attr->grh.sgid_index = (u8) gid_index;