net: hns3: fix for loopback failure when vlan filter is enable

When vlan ctag filter is enabled, the loopback selftest fails because
loopback selftest does not support vlan.

This patch fixes it by disabling the vlan ctag filter when runnig
loopback selftest.
Signed-off-by: NYunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c

@@ -309,6 +309,9 @@ static void hns3_self_test(struct net_device *ndev,
 	struct hnae3_handle *h = priv->ae_handle;
 	int st_param[HNS3_SELF_TEST_TPYE_NUM][2];
 	bool if_running = netif_running(ndev);
+#if IS_ENABLED(CONFIG_VLAN_8021Q)
+	bool dis_vlan_filter;
+#endif
 	int test_index = 0;
 	u32 i;
 
@@ -323,6 +326,14 @@ static void hns3_self_test(struct net_device *ndev,
 	if (if_running)
 		dev_close(ndev);
 
+#if IS_ENABLED(CONFIG_VLAN_8021Q)
+	/* Disable the vlan filter for selftest does not support it */
+	dis_vlan_filter = (ndev->features & NETIF_F_HW_VLAN_CTAG_FILTER) &&
+				h->ae_algo->ops->enable_vlan_filter;
+	if (dis_vlan_filter)
+		h->ae_algo->ops->enable_vlan_filter(h, false);
+#endif
+
 	set_bit(HNS3_NIC_STATE_TESTING, &priv->state);
 
 	for (i = 0; i < HNS3_SELF_TEST_TPYE_NUM; i++) {
@@ -345,6 +356,11 @@ static void hns3_self_test(struct net_device *ndev,
 
 	clear_bit(HNS3_NIC_STATE_TESTING, &priv->state);
 
+#if IS_ENABLED(CONFIG_VLAN_8021Q)
+	if (dis_vlan_filter)
+		h->ae_algo->ops->enable_vlan_filter(h, true);
+#endif
+
 	if (if_running)
 		dev_open(ndev);
 }