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Subject[PATCH AUTOSEL 4.18 122/131] RDMA/hns: Add illegal hop_num judgement
Date
From: Lijun Ou <oulijun@huawei.com>

[ Upstream commit 26f63b9c33ceda12fb9136a1d0c80e03c9ebb514 ]

When hop_num is more than three, it need to return -EINVAL. This patch
fixes it.

Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
drivers/infiniband/hw/hns/hns_roce_hem.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/infiniband/hw/hns/hns_roce_hem.c b/drivers/infiniband/hw/hns/hns_roce_hem.c
index 63b5b3edabcb..8dc336a85128 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hem.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hem.c
@@ -494,6 +494,9 @@ static int hns_roce_table_mhop_get(struct hns_roce_dev *hr_dev,
step_idx = 1;
} else if (hop_num == HNS_ROCE_HOP_NUM_0) {
step_idx = 0;
+ } else {
+ ret = -EINVAL;
+ goto err_dma_alloc_l1;
}

/* set HEM base address to hardware */
--
2.17.1
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