IB/core: Validate route when we init ah

In order to make sure API users don't try to use SGIDs which don't
conform to the routing table, validate the route before searching
the RoCE GID table.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/ocrdma/ocrdma_ah.c

@@ -154,7 +154,7 @@ struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct ib_ah_attr *attr)
 	    (!rdma_link_local_addr((struct in6_addr *)attr->grh.dgid.raw))) {
 		status = rdma_addr_find_dmac_by_grh(&sgid, &attr->grh.dgid,
 						    attr->dmac, &vlan_tag,
-						    sgid_attr.ndev->ifindex);
+						    &sgid_attr.ndev->ifindex);
 		if (status) {
 			pr_err("%s(): Failed to resolve dmac from gid." 
 				"status = %d\n", __func__, status);