linux-kernel - Re: [PATCH] hwmon: Use min() instead of doing it manually

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Message-ID: <e689de7b-033b-0ada-5135-faf7fdb1e26b@roeck-us.net>
Date:   Mon, 27 Dec 2021 07:43:12 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>,
        mezin.alexander@...il.com
Cc:     jdelvare@...e.com, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org, Abaci Robot <abaci@...ux.alibaba.com>
Subject: Re: [PATCH] hwmon: Use min() instead of doing it manually

On 12/27/21 3:36 AM, Jiapeng Chong wrote:
> Eliminate following coccicheck warning:
> 
> ./drivers/hwmon/nzxt-smart2.c:461:12-13: WARNING opportunity for min().
> 
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
> ---
>   drivers/hwmon/nzxt-smart2.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/hwmon/nzxt-smart2.c b/drivers/hwmon/nzxt-smart2.c
> index 534d39b8908e..b30de7441fbb 100644
> --- a/drivers/hwmon/nzxt-smart2.c
> +++ b/drivers/hwmon/nzxt-smart2.c
> @@ -458,7 +458,7 @@ static int send_output_report(struct drvdata *drvdata, const void *data,
>   
>   	ret = hid_hw_output_report(drvdata->hid, drvdata->output_buffer,
>   				   sizeof(drvdata->output_buffer));
> -	return ret < 0 ? ret : 0;
> +	return min(ret, 0);

Nack, that is just confusing. ret is an error if < 0, and min obfuscates
that we want to return an error or 0.

Guenter