net: hns3: fix duplicate node in VLAN list

[ Upstream commit 94391fae82f71c98ecc7716a32611fcca73c74eb ]

VLAN list should not be added duplicate VLAN node, otherwise it would
cause "add failed" when restore VLAN from VLAN list, so this patch adds
VLAN ID check before adding node into VLAN list.

Fixes: c6075b193462 ("net: hns3: Record VF vlan tables")
Signed-off-by: Guojia Liao <liaoguojia@huawei.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 00254d167904e512eaaa741869f01b44835d6fb5..f105ff9e3f4cd724fd74de67ca572741444aa617 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -9869,7 +9869,11 @@ static int hclge_init_vlan_config(struct hclge_dev *hdev)
 static void hclge_add_vport_vlan_table(struct hclge_vport *vport, u16 vlan_id,
                                       bool writen_to_tbl)
 {
-       struct hclge_vport_vlan_cfg *vlan;
+       struct hclge_vport_vlan_cfg *vlan, *tmp;
+
+       list_for_each_entry_safe(vlan, tmp, &vport->vlan_list, node)
+               if (vlan->vlan_id == vlan_id)
+                       return;
 
        vlan = kzalloc(sizeof(*vlan), GFP_KERNEL);
        if (!vlan)