[PATCH] net: hns3: Add error handling for VLAN filter hardware configuration

[Wentao Liang <vulab@iscas.ac.cn>]

The hclge_rm_vport_vlan_table() calls hclge_set_vlan_filter_hw() but does
not check the return value. This could lead to execution with potentially
invalid data. A proper implementation can be found in
hclge_add_vport_all_vlan_table().

Add error handling after calling hclge_set_vlan_filter_hw(). If
hclge_set_vlan_filter_hw() fails, log an error message via dev_err() and
return.

Fixes: c6075b193462 ("net: hns3: Record VF vlan tables")
Cc: stable@vger.kernel.org # v5.1
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
---
 .../hisilicon/hns3/hns3pf/hclge_main.c        | 20 +++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index db7845009252..5ab4c7f63766 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -10141,15 +10141,23 @@ static void hclge_rm_vport_vlan_table(struct hclge_vport *vport, u16 vlan_id,
 {
 	struct hclge_vport_vlan_cfg *vlan, *tmp;
 	struct hclge_dev *hdev = vport->back;
+	int ret;
 
 	list_for_each_entry_safe(vlan, tmp, &vport->vlan_list, node) {
 		if (vlan->vlan_id == vlan_id) {
-			if (is_write_tbl && vlan->hd_tbl_status)
-				hclge_set_vlan_filter_hw(hdev,
-							 htons(ETH_P_8021Q),
-							 vport->vport_id,
-							 vlan_id,
-							 true);
+			if (is_write_tbl && vlan->hd_tbl_status) {
+				ret = hclge_set_vlan_filter_hw(hdev,
+							       htons(ETH_P_8021Q),
+							       vport->vport_id,
+							       vlan_id,
+							       true);
+				if (ret) {
+					dev_err(&hdev->pdev->dev,
+						"restore vport vlan list failed, ret=%d\n",
+						ret);
+					return;
+				}
+			}
 
 			list_del(&vlan->node);
 			kfree(vlan);
-- 
2.42.0.windows.2