IB/core: Use rdma_ah_attr accessor functions

Modify core and driver components to use accessor functions
introduced to access individual fields of rdma_ah_attr

Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Don Hiatt <don.hiatt@intel.com>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Reviewed-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
diff --git a/drivers/infiniband/sw/rxe/rxe_qp.c b/drivers/infiniband/sw/rxe/rxe_qp.c
index 1a123ed..80ccc7c 100644
--- a/drivers/infiniband/sw/rxe/rxe_qp.c
+++ b/drivers/infiniband/sw/rxe/rxe_qp.c
@@ -631,8 +631,8 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 
 	if (mask & IB_QP_AV) {
 		ib_get_cached_gid(&rxe->ib_dev, 1,
-				  attr->ah_attr.grh.sgid_index, &sgid,
-				  &sgid_attr);
+				  rdma_ah_read_grh(&attr->ah_attr)->sgid_index,
+				  &sgid, &sgid_attr);
 		rxe_av_from_attr(rxe, attr->port_num, &qp->pri_av,
 				 &attr->ah_attr);
 		rxe_av_fill_ip_info(rxe, &qp->pri_av, &attr->ah_attr,
@@ -642,9 +642,11 @@ int rxe_qp_from_attr(struct rxe_qp *qp, struct ib_qp_attr *attr, int mask,
 	}
 
 	if (mask & IB_QP_ALT_PATH) {
-		ib_get_cached_gid(&rxe->ib_dev, 1,
-				  attr->alt_ah_attr.grh.sgid_index, &sgid,
-				  &sgid_attr);
+		u8 sgid_index =
+			rdma_ah_read_grh(&attr->alt_ah_attr)->sgid_index;
+
+		ib_get_cached_gid(&rxe->ib_dev, 1, sgid_index,
+				  &sgid, &sgid_attr);
 
 		rxe_av_from_attr(rxe, attr->alt_port_num, &qp->alt_av,
 				 &attr->alt_ah_attr);