linux-kernel - Re: [PATCH] pinctrl: zynq: change error code for pinctrl

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Message-ID: <4437293.G26yCXqFQH@wuerfel>
Date:	Tue, 26 May 2015 10:12:13 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Masahiro Yamada <yamada.masahiro@...ionext.com>,
	linux-gpio@...r.kernel.org,
	Linus Walleij <linus.walleij@...aro.org>,
	Michal Simek <michal.simek@...inx.com>,
	linux-kernel@...r.kernel.org,
	Sören Brinkmann <soren.brinkmann@...inx.com>
Subject: Re: [PATCH] pinctrl: zynq: change error code for pinctrl_register failure

On Tuesday 26 May 2015 13:18:29 Masahiro Yamada wrote:
> diff --git a/drivers/pinctrl/pinctrl-zynq.c b/drivers/pinctrl/pinctrl-zynq.c
> index 04748a4..0ff653c 100644
> --- a/drivers/pinctrl/pinctrl-zynq.c
> +++ b/drivers/pinctrl/pinctrl-zynq.c
> @@ -1141,7 +1141,7 @@ static int zynq_pinctrl_probe(struct platform_device *pdev)
>  
>         pctrl->pctrl = pinctrl_register(&zynq_desc, &pdev->dev, pctrl);
>         if (!pctrl->pctrl)
> -               return -ENOMEM;
> +               return -EINVAL;
>  
>         platform_set_drvdata(pdev, pctrl);
>  
> 

One choice seems as bad as the other to me ;-)

Could we add a pinctrl_register_reason() variant that returns a meaningful
error code as ERR_PTR?

	Arnd
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