netdev - Re: [PATCH net] net: bcmgenet: fix accounting of packet drops vs errors

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Date:	Wed, 08 Jul 2015 22:02:39 -0700
From:	Florian Fainelli <f.fainelli@...il.com>
To:	Petri Gynther <pgynther@...gle.com>, netdev@...r.kernel.org
CC:	davem@...emloft.net
Subject: Re: [PATCH net] net: bcmgenet: fix accounting of packet drops vs
 errors

Le 07/08/15 18:55, Petri Gynther a écrit :
> bcmgenet driver needs to separate packet drops from packet errors.
> 
> When the driver has to drop a *good* packet, due to lack of buffers or
> replacement skbs, increment only dev->stats.[rx|tx]_dropped.
> 
> When the driver encounters a bad Rx packet or Tx error, increment only
> dev->stats.[rx|tx]_errors + relevant detailed error counter.
> 
> Signed-off-by: Petri Gynther <pgynther@...gle.com>

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>

> ---
>  drivers/net/ethernet/broadcom/genet/bcmgenet.c | 4 ----
>  1 file changed, 4 deletions(-)
> 
> diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
> b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
> index b43b2cb..64c1e9d 100644
> --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
> +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
> @@ -1230,7 +1230,6 @@ static struct sk_buff *bcmgenet_put_tx_csum(struct
> net_device *dev,
>          new_skb = skb_realloc_headroom(skb, sizeof(*status));
>          dev_kfree_skb(skb);
>          if (!new_skb) {
> -            dev->stats.tx_errors++;
>              dev->stats.tx_dropped++;
>              return NULL;
>          }
> @@ -1465,7 +1464,6 @@ static unsigned int bcmgenet_desc_rx(struct
> bcmgenet_rx_ring *ring,
> 
>          if (unlikely(!skb)) {
>              dev->stats.rx_dropped++;
> -            dev->stats.rx_errors++;
>              goto next;
>          }
> 
> @@ -1493,7 +1491,6 @@ static unsigned int bcmgenet_desc_rx(struct
> bcmgenet_rx_ring *ring,
>          if (unlikely(!(dma_flag & DMA_EOP) || !(dma_flag & DMA_SOP))) {
>              netif_err(priv, rx_status, dev,
>                    "dropping fragmented packet!\n");
> -            dev->stats.rx_dropped++;
>              dev->stats.rx_errors++;
>              dev_kfree_skb_any(skb);
>              goto next;
> @@ -1515,7 +1512,6 @@ static unsigned int bcmgenet_desc_rx(struct
> bcmgenet_rx_ring *ring,
>                  dev->stats.rx_frame_errors++;
>              if (dma_flag & DMA_RX_LG)
>                  dev->stats.rx_length_errors++;
> -            dev->stats.rx_dropped++;
>              dev->stats.rx_errors++;
>              dev_kfree_skb_any(skb);
>              goto next;


-- 
Florian
--
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