RDMA/hns: Only assign the fields of the rq psn if IB_QP_RQ_PSN is set

Only when the IB_QP_RQ_PSN flags of attr_mask is set is it valid to assign
the relatived fields of rq'psn into the qp context when modified qp.
Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

@@ -3670,13 +3670,6 @@ static int modify_qp_init_to_rtr(struct ib_qp *ibqp,
 		       V2_QPC_BYTE_104_RQ_NXT_BLK_ADDR_M,
 		       V2_QPC_BYTE_104_RQ_NXT_BLK_ADDR_S, 0);
 
-	roce_set_field(context->byte_108_rx_reqepsn,
-		       V2_QPC_BYTE_108_RX_REQ_EPSN_M,
-		       V2_QPC_BYTE_108_RX_REQ_EPSN_S, attr->rq_psn);
-	roce_set_field(qpc_mask->byte_108_rx_reqepsn,
-		       V2_QPC_BYTE_108_RX_REQ_EPSN_M,
-		       V2_QPC_BYTE_108_RX_REQ_EPSN_S, 0);
-
 	roce_set_field(context->byte_132_trrl, V2_QPC_BYTE_132_TRRL_BA_M,
 		       V2_QPC_BYTE_132_TRRL_BA_S, dma_handle_3 >> 4);
 	roce_set_field(qpc_mask->byte_132_trrl, V2_QPC_BYTE_132_TRRL_BA_M,
@@ -3784,11 +3777,6 @@ static int modify_qp_init_to_rtr(struct ib_qp *ibqp,
 	context->rq_rnr_timer = 0;
 	qpc_mask->rq_rnr_timer = 0;
 
-	roce_set_field(context->byte_152_raq, V2_QPC_BYTE_152_RAQ_PSN_M,
-		       V2_QPC_BYTE_152_RAQ_PSN_S, attr->rq_psn - 1);
-	roce_set_field(qpc_mask->byte_152_raq, V2_QPC_BYTE_152_RAQ_PSN_M,
-		       V2_QPC_BYTE_152_RAQ_PSN_S, 0);
-
 	roce_set_field(qpc_mask->byte_132_trrl, V2_QPC_BYTE_132_TRRL_HEAD_MAX_M,
 		       V2_QPC_BYTE_132_TRRL_HEAD_MAX_S, 0);
 	roce_set_field(qpc_mask->byte_132_trrl, V2_QPC_BYTE_132_TRRL_TAIL_MAX_M,
@@ -4202,6 +4190,22 @@ static int hns_roce_v2_modify_qp(struct ib_qp *ibqp,
 	if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC))
 		set_access_flags(hr_qp, context, qpc_mask, attr, attr_mask);
 
+	/* RC&UC required attr */
+	if (attr_mask & IB_QP_RQ_PSN) {
+		roce_set_field(context->byte_108_rx_reqepsn,
+			       V2_QPC_BYTE_108_RX_REQ_EPSN_M,
+			       V2_QPC_BYTE_108_RX_REQ_EPSN_S, attr->rq_psn);
+		roce_set_field(qpc_mask->byte_108_rx_reqepsn,
+			       V2_QPC_BYTE_108_RX_REQ_EPSN_M,
+			       V2_QPC_BYTE_108_RX_REQ_EPSN_S, 0);
+
+		roce_set_field(context->byte_152_raq, V2_QPC_BYTE_152_RAQ_PSN_M,
+			       V2_QPC_BYTE_152_RAQ_PSN_S, attr->rq_psn - 1);
+		roce_set_field(qpc_mask->byte_152_raq,
+			       V2_QPC_BYTE_152_RAQ_PSN_M,
+			       V2_QPC_BYTE_152_RAQ_PSN_S, 0);
+	}
+
 	roce_set_bit(context->byte_108_rx_reqepsn, V2_QPC_BYTE_108_INV_CREDIT_S,
 		     ibqp->srq ? 1 : 0);
 	roce_set_bit(qpc_mask->byte_108_rx_reqepsn,