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Subject[PATCH net-next 12/12] net: hns3: MAC table entry count function increases operation 0 value protection measures
Date
From: liuzhongzhu <liuzhongzhu@huawei.com>

When updating the available MAC VLAN table counts,
MAC VLAN table entry count function adds
operation 0 value protection measures.

Signed-off-by: liuzhongzhu <liuzhongzhu@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
---
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 f55835dee5c7..0a64c7f2dc6c 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -5830,9 +5830,12 @@ static void hclge_update_umv_space(struct hclge_vport *vport, bool is_free)
if (is_free) {
if (vport->used_umv_num > hdev->priv_umv_size)
hdev->share_umv_size++;
- vport->used_umv_num--;
+
+ if (vport->used_umv_num > 0)
+ vport->used_umv_num--;
} else {
- if (vport->used_umv_num >= hdev->priv_umv_size)
+ if (vport->used_umv_num >= hdev->priv_umv_size &&
+ hdev->share_umv_size > 0)
hdev->share_umv_size--;
vport->used_umv_num++;
}
--
2.20.1

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