[PATCH 4.18 150/158] RDMA/hns: Add illegal hop_num judgement
From: Greg Kroah-Hartman
Date: Mon Sep 17 2018 - 19:16:08 EST
4.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Lijun Ou <oulijun@xxxxxxxxxx>
[ 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@xxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/infiniband/hw/hns/hns_roce_hem.c | 3 +++
1 file changed, 3 insertions(+)
--- 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(struc
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 */