linux-kernel - [PATCH V2 for-next 4/8] RDMA/hns: Set mask for destination qp field of qp context assignment

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Date:   Fri, 29 Sep 2017 23:10:10 +0800
From:   "Wei Hu (Xavier)" <xavier.huwei@...wei.com>
To:     <dledford@...hat.com>
CC:     <linux-rdma@...r.kernel.org>, <xavier.huwei@...wei.com>,
        <lijun_nudt@....com>, <oulijun@...wei.com>,
        <charles.chenxin@...wei.com>, <liuyixian@...wei.com>,
        <xushaobo2@...wei.com>, <zhangxiping3@...wei.com>,
        <linuxarm@...wei.com>, <linux-kernel@...r.kernel.org>,
        <shaobohsu@....com>
Subject: [PATCH V2 for-next 4/8] RDMA/hns: Set mask for destination qp field of qp context assignment

From: Lijun Ou <oulijun@...wei.com>

When only set IB_QP_DEST_QPN flag for attr_mask, the operation of
assigning the dest_qp_num for dest_qp field of qp context is valid.

Signed-off-by: Lijun Ou <oulijun@...wei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei@...wei.com>
Signed-off-by: Shaobo Xu <xushaobo2@...wei.com>
---
 drivers/infiniband/hw/hns/hns_roce_hw_v1.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
index 6f309f7..10d828c 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
@@ -2888,10 +2888,11 @@ static int hns_roce_v1_m_qp(struct ib_qp *ibqp, const struct ib_qp_attr *attr,
 			       QP_CONTEXT_QPC_BYTES_32_RESPONDER_RESOURCES_S,
 			       ilog2((unsigned int)attr->max_dest_rd_atomic));
 
-		roce_set_field(context->qpc_bytes_36,
-			       QP_CONTEXT_QPC_BYTES_36_DEST_QP_M,
-			       QP_CONTEXT_QPC_BYTES_36_DEST_QP_S,
-			       attr->dest_qp_num);
+		if (attr_mask & IB_QP_DEST_QPN)
+			roce_set_field(context->qpc_bytes_36,
+				       QP_CONTEXT_QPC_BYTES_36_DEST_QP_M,
+				       QP_CONTEXT_QPC_BYTES_36_DEST_QP_S,
+				       attr->dest_qp_num);
 
 		/* Configure GID index */
 		port_num = rdma_ah_get_port_num(&attr->ah_attr);
-- 
1.9.1