redonkable/alistair23-linux
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RDMA/hns: Fix the bug while use multi-hop of pbl

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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>
This commit is contained in:
Lijun Ou 2018-12-08 18:40:09 +08:00 committed by Jason Gunthorpe
parent 233673e422
commit 4af07f01f7
1 changed files with 2 additions and 2 deletions
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4
drivers/infiniband/hw/hns/hns_roce_mr.c
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@ -1128,14 +1128,14 @@ 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;