linux-kernel - Re: [PATCH] net/mlx5: Use kfree(ft->g) in arfs_create

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Date:   Fri, 5 Jun 2020 12:57:14 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Denis Efremov <efremov@...ux.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Cc:     Leon Romanovsky <leon@...nel.org>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net/mlx5: Use kfree(ft->g) in arfs_create_groups()



On 6/5/20 12:22 PM, Denis Efremov wrote:
> Use kfree() instead of kvfree() on ft->g in arfs_create_groups() because
> the memory is allocated with kcalloc().
> 
> Signed-off-by: Denis Efremov <efremov@...ux.com>
> ---
>  drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c b/drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c
> index 014639ea06e3..c4c9d6cda7e6 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_arfs.c
> @@ -220,7 +220,7 @@ static int arfs_create_groups(struct mlx5e_flow_table *ft,
>  			sizeof(*ft->g), GFP_KERNEL);
>  	in = kvzalloc(inlen, GFP_KERNEL);
>  	if  (!in || !ft->g) {
> -		kvfree(ft->g);
> +		kfree(ft->g);
>  		kvfree(in);
>  		return -ENOMEM;
>  	}
> 

This is slow path, kvfree() is perfectly able to free memory that was kmalloc()ed

net-next is closed, can we avoid these patches during merge window ?