net: hns3: mark unexcuted loopback test result as UNEXECUTED

Currently, loopback test may be skipped when resetting, but the test
result will still show as 'PASS', because the driver doesn't set
ETH_TEST_FL_FAILED flag. Fix it by setting the flag and
initializating the value to UNEXECUTED.

Fixes: 4c8dab1 ("net: hns3: reconstruct function hns3_self_test")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Jijie Shao <shaojijie@huawei.com>
Reviewed-by: Michal Kubiak <michal.kubiak@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Author: IronShen

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

@@ -78,6 +78,9 @@ static const struct hns3_stats hns3_rxq_stats[] = {
 #define HNS3_NIC_LB_TEST_NO_MEM_ERR	1
 #define HNS3_NIC_LB_TEST_TX_CNT_ERR	2
 #define HNS3_NIC_LB_TEST_RX_CNT_ERR	3
+#define HNS3_NIC_LB_TEST_UNEXECUTED	4
+
+static int hns3_get_sset_count(struct net_device *netdev, int stringset);
 
 static int hns3_lp_setup(struct net_device *ndev, enum hnae3_loop loop, bool en)
 {
@@ -418,18 +421,26 @@ static void hns3_do_external_lb(struct net_device *ndev,
 static void hns3_self_test(struct net_device *ndev,
 			   struct ethtool_test *eth_test, u64 *data)
 {
+	int cnt = hns3_get_sset_count(ndev, ETH_SS_TEST);
 	struct hns3_nic_priv *priv = netdev_priv(ndev);
 	struct hnae3_handle *h = priv->ae_handle;
 	int st_param[HNAE3_LOOP_NONE][2];
 	bool if_running = netif_running(ndev);
+	int i;
+
+	/* initialize the loopback test result, avoid marking an unexcuted
+	 * loopback test as PASS.
+	 */
+	for (i = 0; i < cnt; i++)
+		data[i] = HNS3_NIC_LB_TEST_UNEXECUTED;
 
 	if (hns3_nic_resetting(ndev)) {
 		netdev_err(ndev, "dev resetting!");
-		return;
+		goto failure;
 	}
 
 	if (!(eth_test->flags & ETH_TEST_FL_OFFLINE))
-		return;
+		goto failure;
 
 	if (netif_msg_ifdown(h))
 		netdev_info(ndev, "self test start\n");
@@ -451,6 +462,10 @@ static void hns3_self_test(struct net_device *ndev,
 
 	if (netif_msg_ifdown(h))
 		netdev_info(ndev, "self test end\n");
+	return;
+
+failure:
+	eth_test->flags |= ETH_TEST_FL_FAILED;
 }
 
 static void hns3_update_limit_promisc_mode(struct net_device *netdev,