linux-kernel - Re: [PATCH 3/6 v3] mmc: sdhci-acpi: Handle return value of platform_get

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Date:   Wed, 22 Nov 2017 14:02:58 +0200
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arvind Yadav <arvind.yadav.cs@...il.com>, ben-linux@...ff.org,
        ulf.hansson@...aro.org, vireshk@...nel.org,
        maxime.ripard@...e-electrons.com, wens@...e.org,
        linux@...linux.org.uk, carlo@...one.org, khilman@...libre.com
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mmc@...r.kernel.org, linux-amlogic@...ts.infradead.org
Subject: Re: [PATCH 3/6 v3] mmc: sdhci-acpi: Handle return value of
 platform_get_irq

On 19/11/17 06:52, Arvind Yadav wrote:
> platform_get_irq() can fail here and we must check its return value.
> 
> Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>

Acked-by: Adrian Hunter <adrian.hunter@...el.com>

> ---
> changes in v2 :
>               Add failure case '<= 0' instead of '< 0'. IRQ0 is not valid.
> changes in v3 :
>               return -EINVAL instead of host->irq.
> 
>  drivers/mmc/host/sdhci-acpi.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
> index b988997..0d9965b 100644
> --- a/drivers/mmc/host/sdhci-acpi.c
> +++ b/drivers/mmc/host/sdhci-acpi.c
> @@ -566,6 +566,10 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
>  	host->hw_name	= "ACPI";
>  	host->ops	= &sdhci_acpi_ops_dflt;
>  	host->irq	= platform_get_irq(pdev, 0);
> +	if (host->irq <= 0) {
> +		err = -EINVAL;
> +		goto err_free;
> +	}
>  
>  	host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
>  					    resource_size(iomem));
>