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Subject: Re: [PATCH 5/8] ata: sata_rcar: Convert to
 devm_platform_ioremap_resource()
To:     Yangtao Li <frank.li@vivo.com>, Damien Le Moal <dlemoal@kernel.org>
CC:     <linux-ide@vger.kernel.org>, <linux-renesas-soc@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>
References: <20230706124239.23366-1-frank.li@vivo.com>
 <20230706124239.23366-5-frank.li@vivo.com>
From:   Sergey Shtylyov <s.shtylyov@omp.ru>
Organization: Open Mobile Platform
Message-ID: <845da26d-0369-ba58-fb53-d37e6eac39a3@omp.ru>
Date:   Fri, 7 Jul 2023 00:10:30 +0300
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On 7/6/23 3:42 PM, Yangtao Li wrote:

> Use devm_platform_ioremap_resource() to simplify code.
> 
> Signed-off-by: Yangtao Li <frank.li@vivo.com>
> ---
>  drivers/ata/sata_rcar.c | 9 ++-------
>  1 file changed, 2 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/ata/sata_rcar.c b/drivers/ata/sata_rcar.c
> index 34790f15c1b8..63f8337c2a98 100644
> --- a/drivers/ata/sata_rcar.c
> +++ b/drivers/ata/sata_rcar.c
> @@ -861,15 +861,11 @@ static int sata_rcar_probe(struct platform_device *pdev)
>  	struct device *dev = &pdev->dev;
>  	struct ata_host *host;
>  	struct sata_rcar_priv *priv;
> -	struct resource *mem;
> -	int irq;
> -	int ret = 0;
> +	int irq, ret;

   This unneeded init of ret should be in a separate patch.

>  
>  	irq = platform_get_irq(pdev, 0);
>  	if (irq < 0)
>  		return irq;
> -	if (!irq)
> -		return -EINVAL;

   This is a separate issue too. I thought I've removed this myself
but apparently not, the commit [1] took shamefully long time to merge... :-(

[...]
> @@ -890,8 +886,7 @@ static int sata_rcar_probe(struct platform_device *pdev)
>  
>  	host->private_data = priv;
>  
> -	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	priv->base = devm_ioremap_resource(dev, mem);
> +	priv->base = devm_platform_ioremap_resource(pdev, 0);
>  	if (IS_ERR(priv->base)) {
>  		ret = PTR_ERR(priv->base);
>  		goto err_pm_put;

   The (documented) change looks OK.


[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ce753ad1549cbe9ccaea4c06a1f5fa47432c8289

MBR, Seregy