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Commit 2ec10345 authored by Lijun Ou's avatar Lijun Ou Committed by Greg Kroah-Hartman
Browse files

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: default avatarLijun Ou <oulijun@huawei.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 60da6da4

drivers/infiniband/hw/hns/hns_roce_mr.c

+2 −2
Original line number Diff line number Diff line
@@ -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;