linux-kernel - Re: [PATCH v1] sfc: Convert to use ERR

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Message-ID: <6e57f3c0-84bb-ce5d-bbca-b1a823729262@gmail.com>
Date: Wed, 28 Aug 2024 14:23:02 +0100
From: Edward Cree <ecree.xilinx@...il.com>
To: Shen Lichuan <shenlichuan@...o.com>, habetsm.xilinx@...il.com,
 davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com
Cc: netdev@...r.kernel.org, linux-net-drivers@....com,
 linux-kernel@...r.kernel.org, opensource.kernel@...o.com
Subject: Re: [PATCH v1] sfc: Convert to use ERR_CAST()

On 28/08/2024 11:00, Shen Lichuan wrote:
> As opposed to open-code, using the ERR_CAST macro clearly indicates that 
> this is a pointer to an error value and a type conversion was performed.
> 
> Signed-off-by: Shen Lichuan <shenlichuan@...o.com>
> ---
>  drivers/net/ethernet/sfc/tc_counters.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/sfc/tc_counters.c b/drivers/net/ethernet/sfc/tc_counters.c
> index c44088424323..76d32641202b 100644
> --- a/drivers/net/ethernet/sfc/tc_counters.c
> +++ b/drivers/net/ethernet/sfc/tc_counters.c
> @@ -249,7 +249,7 @@ struct efx_tc_counter_index *efx_tc_flower_get_counter_index(
>  					       &ctr->linkage,
>  					       efx_tc_counter_id_ht_params);
>  			kfree(ctr);
> -			return (void *)cnt; /* it's an ERR_PTR */
> +			return ERR_CAST(cnt); /* it's an ERR_PTR */

May as well remove the now superfluous comment.
Other than that this lgtm.