linux-kernel - Re: [PATCH] mmc: mxs-mmc: Fix a resource leak in an error handling path in 'mxs_mmc

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Message-ID: <CAPDyKFpvjdbWnCD9KRnZAimc_X0CaYS9uCVceuEOX+7THifLpQ@mail.gmail.com>
Date:   Mon, 11 Jan 2021 19:05:29 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc:     Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Peter Ujfalusi <peter.ujfalusi@...com>,
        Doug Anderson <dianders@...omium.org>,
        Chris Ball <cjb@...top.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] mmc: mxs-mmc: Fix a resource leak in an error handling
 path in 'mxs_mmc_probe()'

On Tue, 8 Dec 2020 at 21:35, Christophe JAILLET
<christophe.jaillet@...adoo.fr> wrote:
>
> If 'mmc_of_parse()' fails, we must undo the previous 'dma_request_chan()'
> call.
>
> Fixes: abd37cccd47f ("mmc: mxs: use mmc_gpio_get_ro for detecting read-only status")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>

Applied for next (by dropping the fixes tag as it seems non-critical
anyway), thanks!

Kind regards
Uffe



> ---
> I'm not 100% sure of the Fixes tag, but it seems to be the root cause. The
> erroneous 'out_clk_disable' has then been kept around in the following
> commits
> ---
>  drivers/mmc/host/mxs-mmc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
> index 56bbc6cd9c84..947581de7860 100644
> --- a/drivers/mmc/host/mxs-mmc.c
> +++ b/drivers/mmc/host/mxs-mmc.c
> @@ -628,7 +628,7 @@ static int mxs_mmc_probe(struct platform_device *pdev)
>
>         ret = mmc_of_parse(mmc);
>         if (ret)
> -               goto out_clk_disable;
> +               goto out_free_dma;
>
>         mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
>
> --
> 2.27.0
>