linux-kernel - [PATCH 5.14 137/432] RDMA/hns: Bugfix for the missing assignment for dip

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Date:   Thu, 16 Sep 2021 17:58:06 +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,
        Junxian Huang <huangjunxian4@...ilicon.com>,
        Wenpeng Liang <liangwenpeng@...wei.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.14 137/432] RDMA/hns: Bugfix for the missing assignment for dip_idx

From: Junxian Huang <huangjunxian4@...ilicon.com>

[ Upstream commit 074f315fc54a9ce45559a44ca36d9fa1ee1ea2cd ]

When the dgid-dip_idx mapping relationship exists, dip should be assigned.

Fixes: f91696f2f053 ("RDMA/hns: Support congestion control type selection according to the FW")
Link: https://lore.kernel.org/r/1629884592-23424-3-git-send-email-liangwenpeng@huawei.com
Signed-off-by: Junxian Huang <huangjunxian4@...ilicon.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 | 4 +++-
 1 file changed, 3 insertions(+), 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 f4cea6dcec2f..d9e330a383b2 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -4514,8 +4514,10 @@ static int get_dip_ctx_idx(struct ib_qp *ibqp, const struct ib_qp_attr *attr,
 	spin_lock_irqsave(&hr_dev->dip_list_lock, flags);
 
 	list_for_each_entry(hr_dip, &hr_dev->dip_list, node) {
-		if (!memcmp(grh->dgid.raw, hr_dip->dgid, 16))
+		if (!memcmp(grh->dgid.raw, hr_dip->dgid, 16)) {
+			*dip_idx = hr_dip->dip_idx;
 			goto out;
+		}
 	}
 
 	/* If no dgid is found, a new dip and a mapping between dgid and
-- 
2.30.2