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

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Message-ID: <12e63ae7-bc25-4790-883a-ee0eaa28317d@tuxon.dev>
Date:   Tue, 21 Nov 2023 07:59:52 +0200
From:   claudiu beznea <claudiu.beznea@...on.dev>
To:     Sergey Shtylyov <s.shtylyov@....ru>, 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 20.11.2023 21:03, Sergey Shtylyov wrote:
> 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.

This will lead to a bit more complicated patch, AFAICT. I tried to keep it
simple for a fix. Same thing for patch 2.

> 
> [...]
> 
> MBR, Sergey