From: Lijun Ou <oulijun@huawei.com>
Date: Sat, 8 Dec 2018 10:40:09 +0000 (+0800)
Subject: RDMA/hns: Fix the bug while use multi-hop of pbl
X-Git-Tag: v4.19.88~247
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=2ec10345885541e618fb4a01694bce4e562b8e44;p=thirdparty%2Fkernel%2Fstable.git

RDMA/hns: Fix the bug while use multi-hop of pbl

[ Upstream commit 4af07f01f7a787ba5158352b98c9e3cb74995a1c ]

It will prevent multiply overflow when defines the pbl for u64 type.

Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/infiniband/hw/hns/hns_roce_mr.c b/drivers/infiniband/hw/hns/hns_roce_mr.c
index 41a538d23b802..c68596d4e8037 100644
--- a/drivers/infiniband/hw/hns/hns_roce_mr.c
+++ b/drivers/infiniband/hw/hns/hns_roce_mr.c
@@ -1017,14 +1017,14 @@ struct ib_mr *hns_roce_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 			goto err_umem;
 		}
 	} else {
-		int pbl_size = 1;
+		u64 pbl_size = 1;
 
 		bt_size = (1 << (hr_dev->caps.pbl_ba_pg_sz + PAGE_SHIFT)) / 8;
 		for (i = 0; i < hr_dev->caps.pbl_hop_num; i++)
 			pbl_size *= bt_size;
 		if (n > pbl_size) {
 			dev_err(dev,
-			    " MR len %lld err. MR page num is limited to %d!\n",
+			    " MR len %lld err. MR page num is limited to %lld!\n",
 			    length, pbl_size);
 			ret = -EINVAL;
 			goto err_umem;