linux-kernel - Re: [PATCH v1 2/2] mmc: sdhci-acpi: Use devm_platform_ioremap

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Message-ID: <b8751b8d-f42d-4121-836d-f21b91df1b7e@wanadoo.fr>
Date: Mon, 15 Apr 2024 07:20:49 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
 linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Adrian Hunter <adrian.hunter@...el.com>,
 Ulf Hansson <ulf.hansson@...aro.org>
Subject: Re: [PATCH v1 2/2] mmc: sdhci-acpi: Use
 devm_platform_ioremap_resource()

Le 12/04/2024 à 20:46, Andy Shevchenko a écrit :
> The struct resource is not used for anything else, so we can simplify
> the code a bit by using the helper function.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
>   drivers/mmc/host/sdhci-acpi.c | 20 +++-----------------
>   1 file changed, 3 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
> index 32ae6f763c1d..b9c8eb87a01a 100644
> --- a/drivers/mmc/host/sdhci-acpi.c
> +++ b/drivers/mmc/host/sdhci-acpi.c
> @@ -779,8 +779,6 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
>   	struct acpi_device *device;
>   	struct sdhci_acpi_host *c;
>   	struct sdhci_host *host;
> -	struct resource *iomem;
> -	resource_size_t len;
>   	size_t priv_size;
>   	int quirks = 0;
>   	int err;
> @@ -801,17 +799,6 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
>   	if (sdhci_acpi_byt_defer(dev))
>   		return -EPROBE_DEFER;
>   
> -	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	if (!iomem)
> -		return -ENOMEM;
> -
> -	len = resource_size(iomem);
> -	if (len < 0x100)
> -		dev_err(dev, "Invalid iomem size!\n");

HI,

Was this test useful?
Should it be mentioned in the commit message?

CJ

> -
> -	if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
> -		return -ENOMEM;
> -
>   	priv_size = slot ? slot->priv_size : 0;
>   	host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host) + priv_size);
>   	if (IS_ERR(host))
> @@ -833,10 +820,9 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
>   		goto err_free;
>   	}
>   
> -	host->ioaddr = devm_ioremap(dev, iomem->start,
> -					    resource_size(iomem));
> -	if (host->ioaddr == NULL) {
> -		err = -ENOMEM;
> +	host->ioaddr = devm_platform_ioremap_resource(pdev, 0);
> +	if (IS_ERR(host->ioaddr)) {
> +		err = PTR_ERR(host->ioaddr);
>   		goto err_free;
>   	}
>