netdev - Re: [PATCH 01/13] net: ravb: Check return value of reset_control

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Message-ID: <2ac71d8d-84d8-2092-70b4-9ed21e78541f@omp.ru>
Date: Mon, 20 Nov 2023 22:03:40 +0300
From: Sergey Shtylyov <s.shtylyov@....ru>
To: Claudiu <claudiu.beznea@...on.dev>, <davem@...emloft.net>,
	<edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
	<p.zabel@...gutronix.de>, <yoshihiro.shimoda.uh@...esas.com>,
	<geert+renesas@...der.be>, <wsa+renesas@...g-engineering.com>,
	<biju.das.jz@...renesas.com>, <prabhakar.mahadev-lad.rj@...renesas.com>,
	<sergei.shtylyov@...entembedded.com>, <mitsuhiro.kimura.kc@...esas.com>,
	<masaru.nagai.vx@...esas.com>
CC: <netdev@...r.kernel.org>, <linux-renesas-soc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Claudiu Beznea
	<claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH 01/13] net: ravb: Check return value of
 reset_control_deassert()

On 11/20/23 11:45 AM, Claudiu wrote:

> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> 
> reset_control_deassert() could return an error. Some devices cannot work
> if reset signal de-assert operation fails. To avoid this check the return
> code of reset_control_deassert() in ravb_probe() and take proper action.
> 
> Fixes: 0d13a1a464a0 ("ravb: Add reset support")
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> ---
>  drivers/net/ethernet/renesas/ravb_main.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
> index c70cff80cc99..342978bdbd7e 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
> @@ -2645,7 +2645,12 @@ static int ravb_probe(struct platform_device *pdev)
>  	ndev->features = info->net_features;
>  	ndev->hw_features = info->net_hw_features;
>  
> -	reset_control_deassert(rstc);
> +	error = reset_control_deassert(rstc);
> +	if (error) {
> +		free_netdev(ndev);
> +		return error;

  No, please use *goto* here. And please fix up the order of statements under
the out_release label before doing that.

[...]

MBR, Sergey