RDMA/ocrdma: Fix dmac resolution for link local address

rdma_addr_find_dmac_by_grh fails to resolve dmac for link local address.
Use rdma_get_ll_mac to resolve the link local address.

Signed-off-by: Padmanabh Ratnakar <padmanabh.ratnakar@avagotech.com>
Signed-off-by: Mitesh Ahuja <mitesh.ahuja@avagotech.com>
Signed-off-by: Devesh Sharma <devesh.sharma@avagotech.com>
Signed-off-by: Selvin Xavier <selvin.xavier@avagotech.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/ocrdma/ocrdma.h

@@ -515,6 +515,8 @@ static inline int ocrdma_resolve_dmac(struct ocrdma_dev *dev,
 	memcpy(&in6, ah_attr->grh.dgid.raw, sizeof(in6));
 	if (rdma_is_multicast_addr(&in6))
 		rdma_get_mcast_mac(&in6, mac_addr);
+	else if (rdma_link_local_addr(&in6))
+		rdma_get_ll_mac(&in6, mac_addr);
 	else
 		memcpy(mac_addr, ah_attr->dmac, ETH_ALEN);
 	return 0;

drivers/infiniband/hw/ocrdma/ocrdma_ah.c

@@ -127,7 +127,9 @@ struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr)
 		goto av_conf_err;
 	}
 
-	if (pd->uctx) {
+	if ((pd->uctx) &&
+	    (!rdma_is_multicast_addr((struct in6_addr *)attr->grh.dgid.raw)) &&
+	    (!rdma_link_local_addr((struct in6_addr *)attr->grh.dgid.raw))) {
 		status = rdma_addr_find_dmac_by_grh(&sgid, &attr->grh.dgid,
                                         attr->dmac, &attr->vlan_id);
 		if (status) {