linux-kernel - Re: [PATCH v2 2/3] spi: cs42l43: Make handling missing spk-id GPIOs explicit

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Message-ID: <aBOUTIoIPeyJSvam@opensource.cirrus.com>
Date: Thu, 1 May 2025 16:33:32 +0100
From: Charles Keepax <ckeepax@...nsource.cirrus.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: Mark Brown <broonie@...nel.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Claudiu Beznea <claudiu.beznea@...on.dev>,
        David Rhodes <david.rhodes@...rus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>,
        linux-spi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-sound@...r.kernel.org,
        patches@...nsource.cirrus.com
Subject: Re: [PATCH v2 2/3] spi: cs42l43: Make handling missing spk-id GPIOs
 explicit

On Thu, May 01, 2025 at 05:02:00PM +0200, Krzysztof Kozlowski wrote:
> gpiod_get_array_optional() for spk-id GPIOs can return NULL, if they are
> missing, so do not pass the value to PTR_ERR but instead explicitly
> treat NULL as acceptable condition.  The old code was correct, but
> misleading because PTR_ERR usually is used on errors.
> 
> Reported by Smatch:
>   drivers/spi/spi-cs42l43.c:241 cs42l43_get_speaker_id_gpios() warn: passing zero to 'PTR_ERR'
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> ---

Reviewed-by: Charles Keepax <ckeepax@...nsource.cirrus.com>

Thanks,
Charles