[PATCH 4.15 068/168] net: hns3: Fix an error of total drop packet statistics

[Greg Kroah-Hartman]

4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jian Shen <shenjia...@huawei.com>


[ 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 <shenjia...@huawei.com>
Signed-off-by: Peng Li <lipeng...@huawei.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c |   11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

--- 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 *
        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 *
                        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 *
                        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 *
        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;