IB/rxe: Initialize ib_ah_attr during query_ah

Zero out ib_ah_attr before calling query_ah. Set ah_flags
appropriately.
Reviewed-by: NIra Weiny <ira.weiny@intel.com>
Reviewed-by: NDon Hiatt <don.hiatt@intel.com>
Reviewed-by: NSean Hefty <sean.hefty@intel.com>
Signed-off-by: NDasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

drivers/infiniband/sw/rxe/rxe_av.c

@@ -69,6 +69,7 @@ int rxe_av_to_attr(struct rxe_dev *rxe, struct rxe_av *av,
 		   struct ib_ah_attr *attr)
 {
 	memcpy(&attr->grh, &av->grh, sizeof(av->grh));
+	attr->ah_flags = IB_AH_GRH;
 	attr->port_num = av->port_num;
 	return 0;
 }

drivers/infiniband/sw/rxe/rxe_verbs.c

@@ -378,6 +378,7 @@ static int rxe_query_ah(struct ib_ah *ibah, struct ib_ah_attr *attr)
 	struct rxe_dev *rxe = to_rdev(ibah->device);
 	struct rxe_ah *ah = to_rah(ibah);
 
+	memset(attr, 0, sizeof(*attr));
 	rxe_av_to_attr(rxe, &ah->av, attr);
 	return 0;
 }