[PATCH 5.1 058/371] net: hns3: set ops to null when unregister ad_dev

[Greg Kroah-Hartman]

[ Upstream commit 594a81b39525f0a17e92c2e0b167ae1400650380 ]

The hclge/hclgevf and hns3 module can be unloaded independently,
when hclge/hclgevf unloaded firstly, the ops of ae_dev should
be set to NULL, otherwise it will cause an use-after-free problem.

Fixes: 38caee9d3ee8 ("net: hns3: Add support of the HNAE3 framework")
Signed-off-by: Weihang Li <liweih...@hisilicon.com>
Signed-off-by: Peng Li <lipeng...@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazh...@huawei.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/net/ethernet/hisilicon/hns3/hnae3.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hnae3.c 
b/drivers/net/ethernet/hisilicon/hns3/hnae3.c
index 17ab4f4af6ad..0da814618565 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hnae3.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.c
@@ -247,6 +247,7 @@ void hnae3_unregister_ae_algo(struct hnae3_ae_algo *ae_algo)
 
                ae_algo->ops->uninit_ae_dev(ae_dev);
                hnae3_set_bit(ae_dev->flag, HNAE3_DEV_INITED_B, 0);
+               ae_dev->ops = NULL;
        }
 
        list_del(&ae_algo->node);
@@ -347,6 +348,7 @@ void hnae3_unregister_ae_dev(struct hnae3_ae_dev *ae_dev)
 
                ae_algo->ops->uninit_ae_dev(ae_dev);
                hnae3_set_bit(ae_dev->flag, HNAE3_DEV_INITED_B, 0);
+               ae_dev->ops = NULL;
        }
 
        list_del(&ae_dev->node);
-- 
2.20.1