[PATCH AUTOSEL for 4.15 078/124] net: hns3: Fix an error of total drop packet statistics

[Sasha Levin <Alexander.Levin@xxxxxxxxxxxxx>]

From: Jian Shen <shenjian15@xxxxxxxxxx>

[ Upstream commit d2a5dca8404871be683c6bbc175ebf9c56dd2865 ]

The dropped tx/rx packets number of each tqp should also
be counted into the total drop tx/rx packets numbers.

Fixes: 76ad4f0ee74 ("net: hns3: Add support of HNS3 Ethernet Driver for hip08 SoC")
Signed-off-by: Jian Shen <shenjian15@xxxxxxxxxx>
Signed-off-by: Peng Li <lipeng321@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c
index 853f273da22d..428ede16b10a 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c
@@ -1055,6 +1055,8 @@ hns3_nic_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
 	u64 rx_bytes = 0;
 	u64 tx_pkts = 0;
 	u64 rx_pkts = 0;
+	u64 tx_drop = 0;
+	u64 rx_drop = 0;
 
 	for (idx = 0; idx < queue_num; idx++) {
 		/* fetch the tx stats */
@@ -1063,6 +1065,8 @@ hns3_nic_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
 			start = u64_stats_fetch_begin_irq(&ring->syncp);
 			tx_bytes += ring->stats.tx_bytes;
 			tx_pkts += ring->stats.tx_pkts;
+			tx_drop += ring->stats.tx_busy;
+			tx_drop += ring->stats.sw_err_cnt;
 		} while (u64_stats_fetch_retry_irq(&ring->syncp, start));
 
 		/* fetch the rx stats */
@@ -1071,6 +1075,9 @@ hns3_nic_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
 			start = u64_stats_fetch_begin_irq(&ring->syncp);
 			rx_bytes += ring->stats.rx_bytes;
 			rx_pkts += ring->stats.rx_pkts;
+			rx_drop += ring->stats.non_vld_descs;
+			rx_drop += ring->stats.err_pkt_len;
+			rx_drop += ring->stats.l2_err;
 		} while (u64_stats_fetch_retry_irq(&ring->syncp, start));
 	}
 
@@ -1086,8 +1093,8 @@ hns3_nic_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
 	stats->rx_missed_errors = netdev->stats.rx_missed_errors;
 
 	stats->tx_errors = netdev->stats.tx_errors;
-	stats->rx_dropped = netdev->stats.rx_dropped;
-	stats->tx_dropped = netdev->stats.tx_dropped;
+	stats->rx_dropped = rx_drop + netdev->stats.rx_dropped;
+	stats->tx_dropped = tx_drop + netdev->stats.tx_dropped;
 	stats->collisions = netdev->stats.collisions;
 	stats->rx_over_errors = netdev->stats.rx_over_errors;
 	stats->rx_frame_errors = netdev->stats.rx_frame_errors;
-- 
2.14.1