netdev - Re: [PATCH net-next] mlx4: trust shinfo->gso

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Message-ID: <CALzJLG9S2dRpBOVzc0LQAiOXJZNT+4h25_j7_GWTTHY9dUii=w@mail.gmail.com>
Date:   Wed, 5 Apr 2017 11:58:41 -0400
From:   Saeed Mahameed <saeedm@....mellanox.co.il>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     David Miller <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        Tariq Toukan <tariqt@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: Re: [PATCH net-next] mlx4: trust shinfo->gso_segs

On Wed, Apr 5, 2017 at 11:49 AM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> From: Eric Dumazet <edumazet@...gle.com>
>
> mlx4 is the only driver in the tree making a point to recompute
> shinfo->gso_segs.
>
> Lets remove superfluous code.
>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Cc: Tariq Toukan <tariqt@...lanox.com>
> Cc: Saeed Mahameed <saeedm@...lanox.com>
> ---
>  drivers/net/ethernet/mellanox/mlx4/en_tx.c |    3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/net/ethernet/mellanox/mlx4/en_tx.c b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
> index e0c5ffb3e3a6607456e1f191b0b8c8becfc71219..3ba89bc43d74d8c023776079bcd0bbadd70fb5c6 100644
> --- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c
> +++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
> @@ -978,8 +978,7 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
>
>                 ring->tso_packets++;
>
> -               i = ((skb->len - lso_header_size) / shinfo->gso_size) +
> -                       !!((skb->len - lso_header_size) % shinfo->gso_size);
> +               i = shinfo->gso_segs;
>                 tx_info->nr_bytes = skb->len + (i - 1) * lso_header_size;
>                 ring->packets += i;
>         } else {
>
>

Reviewed-by: Saeed Mahameed <saeedm@...lanox.com>