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

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Message-ID: <CAPDyKFrNsTr9=fpzz2K+aQSS04ziOnLs1KxV-K0StzN=Tb=4MQ@mail.gmail.com>
Date:   Fri, 15 Dec 2017 10:18:03 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Arvind Yadav <arvind.yadav.cs@...il.com>
Cc:     Ben Dooks <ben-linux@...ff.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Viresh Kumar <vireshk@...nel.org>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Russell King <linux@...linux.org.uk>,
        Carlo Caione <carlo@...one.org>,
        Kevin Hilman <khilman@...libre.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "open list:ARM/Amlogic Meson..." <linux-amlogic@...ts.infradead.org>
Subject: Re: [PATCH 6/6 v3] mmc: sunxi-mmc: Handle return value of platform_get_irq

On 19 November 2017 at 05:52, Arvind Yadav <arvind.yadav.cs@...il.com> wrote:
> platform_get_irq() can fail here and we must check its return value.
>
> Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>

Thanks, applied for next!

Kind regards
Uffe

> ---
> 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/sunxi-mmc.c | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
> index cc98355d..c926ac8 100644
> --- a/drivers/mmc/host/sunxi-mmc.c
> +++ b/drivers/mmc/host/sunxi-mmc.c
> @@ -1255,6 +1255,11 @@ static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host,
>                 goto error_assert_reset;
>
>         host->irq = platform_get_irq(pdev, 0);
> +       if (host->irq <= 0) {
> +               ret = -EINVAL;
> +               goto error_assert_reset;
> +       }
> +
>         return devm_request_threaded_irq(&pdev->dev, host->irq, sunxi_mmc_irq,
>                         sunxi_mmc_handle_manual_stop, 0, "sunxi-mmc", host);
>
> --
> 2.7.4
>