linux-kernel - Re: [PATCH v1 1/2] mfd: syscon: Re-use resource_size() to count max

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Message-ID: <CAK8P3a3pFDPa49rXT3hbkptvqsRk5NdVimUT=x8-tGoZKH0yRQ@mail.gmail.com>
Date:   Fri, 15 Nov 2019 10:10:58 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Lee Jones <lee.jones@...aro.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 1/2] mfd: syscon: Re-use resource_size() to count max_register

On Fri, Nov 15, 2019 at 9:49 AM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> Instead of open coded variant use resource_size() and replace
> weird '- 3' to more understandable '- 4'.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---

Acked-by: Arnd Bergmann <arnd@...db.de>

>  drivers/mfd/syscon.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
> index e22197c832e8..13626bb2d432 100644
> --- a/drivers/mfd/syscon.c
> +++ b/drivers/mfd/syscon.c
> @@ -245,7 +245,7 @@ static int syscon_probe(struct platform_device *pdev)
>         if (!base)
>                 return -ENOMEM;
>
> -       syscon_config.max_register = res->end - res->start - 3;
> +       syscon_config.max_register = resource_size(res) - 4;
>         if (pdata)
>                 syscon_config.name = pdata->label;
>         syscon->regmap = devm_regmap_init_mmio(dev, base, &syscon_config);
> --
> 2.24.0
>