From: Junxian Huang <huangjunxian4@hisilicon.com>
Date: Wed, 25 Aug 2021 17:43:11 +0800
Subject: RDMA/hns: Bugfix for the missing assignment for dip_idx
Patch-mainline: v5.15-rc1
Git-commit: 074f315fc54a9ce45559a44ca36d9fa1ee1ea2cd
References: bsc#1190336 stable-5.14.6

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@hisilicon.com>
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/infiniband/hw/hns/hns_roce_hw_v2.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -4511,8 +4511,10 @@ static int get_dip_ctx_idx(struct ib_qp
 	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