linux-kernel - [PATCH 5.14 142/432] RDMA/hns: Fix query destination qpn

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Date:   Thu, 16 Sep 2021 17:58:11 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Wenpeng Liang <liangwenpeng@...wei.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.14 142/432] RDMA/hns: Fix query destination qpn

From: Wenpeng Liang <liangwenpeng@...wei.com>

[ Upstream commit e788a3cd5787aca74e0ee00202d4dca64b43f043 ]

The bit width of dqpn is 24 bits, using u8 will cause truncation error.

Fixes: 926a01dc000d ("RDMA/hns: Add QP operations support for hip08 SoC")
Link: https://lore.kernel.org/r/1629985056-57004-2-git-send-email-liangwenpeng@huawei.com
Signed-off-by: Wenpeng Liang <liangwenpeng@...wei.com>
Signed-off-by: Jason Gunthorpe <jgg@...dia.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index 21c82f5aff04..bf4d9f6658ff 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -5136,7 +5136,7 @@ static int hns_roce_v2_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
 
 	qp_attr->rq_psn = hr_reg_read(&context, QPC_RX_REQ_EPSN);
 	qp_attr->sq_psn = (u32)hr_reg_read(&context, QPC_SQ_CUR_PSN);
-	qp_attr->dest_qp_num = (u8)hr_reg_read(&context, QPC_DQPN);
+	qp_attr->dest_qp_num = hr_reg_read(&context, QPC_DQPN);
 	qp_attr->qp_access_flags =
 		((hr_reg_read(&context, QPC_RRE)) << V2_QP_RRE_S) |
 		((hr_reg_read(&context, QPC_RWE)) << V2_QP_RWE_S) |
-- 
2.30.2