[PATCH net V1 1/6] net/mlx4_en: Count HW buffer overrun only once

[Or Gerlitz]

From: Amir Vadai <a...@vadai.me>

RdropOvflw counts overrun of HW buffer, therefore should
be used for rx_fifo_errors only.

Currently RdropOvflw counter is mistakenly also set into
rx_missed_errors and rx_over_errors too, which makes the
device total dropped packets accounting to show wrong results.

Fix that. Use it for rx_fifo_errors only.

Fixes: c27a02cd94d6 ('mlx4_en: Add driver for Mellanox ConnectX 10GbE NIC')
Signed-off-by: Amir Vadai <a...@vadai.me>
Signed-off-by: Eugenia Emantayev <euge...@mellanox.com>
Signed-off-by: Or Gerlitz <ogerl...@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx4/en_port.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_port.c 
b/drivers/net/ethernet/mellanox/mlx4/en_port.c
index ee99e67..3904b5f 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_port.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_port.c
@@ -238,11 +238,11 @@ int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 
port, u8 reset)
        stats->collisions = 0;
        stats->rx_dropped = be32_to_cpu(mlx4_en_stats->RDROP);
        stats->rx_length_errors = be32_to_cpu(mlx4_en_stats->RdropLength);
-       stats->rx_over_errors = be32_to_cpu(mlx4_en_stats->RdropOvflw);
+       stats->rx_over_errors = 0;
        stats->rx_crc_errors = be32_to_cpu(mlx4_en_stats->RCRC);
        stats->rx_frame_errors = 0;
        stats->rx_fifo_errors = be32_to_cpu(mlx4_en_stats->RdropOvflw);
-       stats->rx_missed_errors = be32_to_cpu(mlx4_en_stats->RdropOvflw);
+       stats->rx_missed_errors = 0;
        stats->tx_aborted_errors = 0;
        stats->tx_carrier_errors = 0;
        stats->tx_fifo_errors = 0;
-- 
2.3.7