[PATCH 5.1 123/155] net: hns3: return 0 and print warning when hit duplicate MAC

Greg Kroah-Hartman
2019-06-13T15:56:58Z

[ Upstream commit 72110b567479f0282489a9b3747e76d8c67d75f5 ]

When set 2 same MAC to different function of one port, IMP
will return error as the later one may modify the origin one.
This will cause bond fail for 2 VFs of one port.

Driver just print warning and return 0 with this patch, so
if set same MAC address, it will return 0 but do not really
configure HW.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index deda606c51e7..6d4d5a470163 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -5942,8 +5942,11 @@ int hclge_add_uc_addr_common(struct hclge_vport *vport,
}

/* check if we just hit the duplicate */
- if (!ret)
- ret = -EINVAL;
+ if (!ret) {
+ dev_warn(&hdev->pdev->dev, "VF %d mac(%pM) exists\n",
+ vport->vport_id, addr);
+ return 0;
+ }

dev_err(&hdev->pdev->dev,
"PF failed to add unicast entry(%pM) in the MAC table\n",
--
2.20.1