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

Message ID 1455722667-23179-2-git-send-email-ogerlitz@mellanox.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Or Gerlitz Feb. 17, 2016, 3:24 p.m. UTC 
From: Amir Vadai <amir@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 <amir@vadai.me>
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx4/en_port.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Rick Jones Feb. 17, 2016, 6:04 p.m. UTC | #1 
On 02/17/2016 07:24 AM, Or Gerlitz wrote:
> From: Amir Vadai <amir@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 <amir@vadai.me>
> Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>

Reviewed-By: Rick Jones <rick.jones2@hpe.com>

rick
diff mbox

Patch

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;