linux-kernel - Re: [PATCH] mmc: sdhci-of-at91: fix memleak on clk

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Message-ID: <96974b11-55f6-e52d-abdb-9f6f77d5c84a@intel.com>
Date:   Tue, 14 Jan 2020 14:10:59 +0200
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        linux-mmc@...r.kernel.org
Cc:     Ludovic Desroches <ludovic.desroches@...rochip.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mmc: sdhci-of-at91: fix memleak on clk_get failure

On 2/01/20 12:42 pm, Michał Mirosław wrote:
> sdhci_alloc_host() does its work not using managed infrastructure, so
> needs explicit free on error path. Add it where needed.
> 
> Cc: <stable@...r.kernel.org>
> Fixes: bb5f8ea4d514 ("mmc: sdhci-of-at91: introduce driver for the Atmel SDMMC")
> Signed-off-by: Michał Mirosław <mirq-linux@...e.qmqm.pl>

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

> ---
>  drivers/mmc/host/sdhci-of-at91.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-of-at91.c b/drivers/mmc/host/sdhci-of-at91.c
> index b2a8c45c9c23..ab2bd314a390 100644
> --- a/drivers/mmc/host/sdhci-of-at91.c
> +++ b/drivers/mmc/host/sdhci-of-at91.c
> @@ -345,20 +345,23 @@ static int sdhci_at91_probe(struct platform_device *pdev)
>  			priv->mainck = NULL;
>  		} else {
>  			dev_err(&pdev->dev, "failed to get baseclk\n");
> -			return PTR_ERR(priv->mainck);
> +			ret = PTR_ERR(priv->mainck);
> +			goto sdhci_pltfm_free;
>  		}
>  	}
>  
>  	priv->hclock = devm_clk_get(&pdev->dev, "hclock");
>  	if (IS_ERR(priv->hclock)) {
>  		dev_err(&pdev->dev, "failed to get hclock\n");
> -		return PTR_ERR(priv->hclock);
> +		ret = PTR_ERR(priv->hclock);
> +		goto sdhci_pltfm_free;
>  	}
>  
>  	priv->gck = devm_clk_get(&pdev->dev, "multclk");
>  	if (IS_ERR(priv->gck)) {
>  		dev_err(&pdev->dev, "failed to get multclk\n");
> -		return PTR_ERR(priv->gck);
> +		ret = PTR_ERR(priv->gck);
> +		goto sdhci_pltfm_free;
>  	}
>  
>  	ret = sdhci_at91_set_clks_presets(&pdev->dev);
>