linux-kernel - Re: [PATCH v2 1/4] driver core: Ignore 0 in dev_err

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Message-ID: <ce59c3c6-8729-469f-a0df-b6844792e324@stanley.mountain>
Date: Sat, 31 Aug 2024 11:25:54 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	Hans de Goede <hdegoede@...hat.com>, linux-kernel@...r.kernel.org,
	platform-driver-x86@...r.kernel.org,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Daniel Scally <djrscally@...il.com>
Subject: Re: [PATCH v2 1/4] driver core: Ignore 0 in dev_err_probe()

On Thu, Aug 22, 2024 at 04:05:38PM +0300, Andy Shevchenko wrote:
> In the similar way, ignore 0 error code (AKA "success") in
> dev_err_probe(). This helps to simplify a code such as
> 
>   if (ret < 0)
>     return dev_err_probe(int3472->dev, ret, err_msg);
> 
>   return ret;
> 
> to
> 
>   return dev_err_probe(int3472->dev, ret, err_msg);
> 
> Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

This is a terrible idea because currently Smatch is able to detect about one
bug per month where someone unintentionally passes the wrong error variable
to dev_err_probe().

I really hate this.

NAKed-by: Dan Carpenter <dan.carpenter@...aro.org>

regards,
dan carpenter