linux-kernel - Re: [PATCH 2/6] net/mlx4

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Message-ID: <66fa1399-cc4b-8bdc-d4bc-ed9befe1803e@gmail.com>
Date:   Mon, 14 Mar 2022 14:37:29 +0200
From:   Tariq Toukan <ttoukan.linux@...il.com>
To:     Julia Lawall <Julia.Lawall@...ia.fr>,
        Tariq Toukan <tariqt@...dia.com>
Cc:     kernel-janitors@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/6] net/mlx4_en: use kzalloc



On 3/12/2022 12:27 PM, Julia Lawall wrote:
> Use kzalloc instead of kmalloc + memset.
> 
> The semantic patch that makes this change is:
> (https://coccinelle.gitlabpages.inria.fr/website/)
> 
> //<smpl>
> @@
> expression res, size, flag;
> @@
> - res = kmalloc(size, flag);
> + res = kzalloc(size, flag);
>    ...
> - memset(res, 0, size);
> //</smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...ia.fr>
> 
> ---
>   drivers/net/ethernet/mellanox/mlx4/en_rx.c |    3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
> index 8cfc649f226b..8f762fc170b3 100644
> --- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
> +++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
> @@ -1067,7 +1067,7 @@ static int mlx4_en_config_rss_qp(struct mlx4_en_priv *priv, int qpn,
>   	struct mlx4_qp_context *context;
>   	int err = 0;
>   
> -	context = kmalloc(sizeof(*context), GFP_KERNEL);
> +	context = kzalloc(sizeof(*context), GFP_KERNEL);
>   	if (!context)
>   		return -ENOMEM;
>   
> @@ -1078,7 +1078,6 @@ static int mlx4_en_config_rss_qp(struct mlx4_en_priv *priv, int qpn,
>   	}
>   	qp->event = mlx4_en_sqp_event;
>   
> -	memset(context, 0, sizeof(*context));
>   	mlx4_en_fill_qp_context(priv, ring->actual_size, ring->stride, 0, 0,
>   				qpn, ring->cqn, -1, context);
>   	context->db_rec_addr = cpu_to_be64(ring->wqres.db.dma);
> 

Thanks for your patch.

Reviewed-by: Tariq Toukan <tariqt@...dia.com>