linux-kernel - [PATCH for-next 3/6] RDMA/hns: Fix PBL page MTR find

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Message-ID: <20221126102911.2921820-4-xuhaoyue1@hisilicon.com>
Date:   Sat, 26 Nov 2022 18:29:08 +0800
From:   Haoyue Xu <xuhaoyue1@...ilicon.com>
To:     <jgg@...dia.com>, <leon@...nel.org>
CC:     <linux-rdma@...r.kernel.org>, <linuxarm@...wei.com>,
        <linux-kernel@...r.kernel.org>, <xuhaoyue1@...ilicon.com>
Subject: [PATCH for-next 3/6] RDMA/hns: Fix PBL page MTR find

From: Chengchang Tang <tangchengchang@...wei.com>

Now, The address of the first two pages in the MR will be searched,
which use to speed up the lookup of the pbl table for hardware.
An exception will occur when there is only one page in this MR.
This patch fix the number of page to search.

Fixes: 9b2cf76c9f05 ("RDMA/hns: Optimize PBL buffer allocation process")
Signed-off-by: Chengchang Tang <tangchengchang@...wei.com>
Signed-off-by: Haoyue Xu <xuhaoyue1@...ilicon.com>
---
 drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 3 ++-
 1 file changed, 2 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 a8f8c790d31d..41835cb05983 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -3274,7 +3274,8 @@ static int set_mtpt_pbl(struct hns_roce_dev *hr_dev,
 	int i, count;
 
 	count = hns_roce_mtr_find(hr_dev, &mr->pbl_mtr, 0, pages,
-				  ARRAY_SIZE(pages), &pbl_ba);
+				  min_t(int, ARRAY_SIZE(pages), mr->npages),
+				  &pbl_ba);
 	if (count < 1) {
 		ibdev_err(ibdev, "failed to find PBL mtr, count = %d.\n",
 			  count);
-- 
2.30.0