linux-kernel - Re: ab3100-otp: fix memory leak in ab3100_otp

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Date:	Fri, 18 Jun 2010 20:17:11 +0200
From:	Samuel Ortiz <sameo@...ux.intel.com>
To:	Axel Lin <axel.lin@...il.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Linus Walleij <linus.walleij@...ricsson.com>
Subject: Re: ab3100-otp: fix memory leak in ab3100_otp_probe

Hi Axel,

On Tue, May 25, 2010 at 02:49:51PM +0800, Axel Lin wrote:
> In current implementation, there is a memory leak if ab3100_otp_read fail.
> And in the case of ab3100_otp_init_debugfs fail, it does not properly remove
> sysfs entries.
> This patch properly handle above failure cases.
Patch applied, thanks a lot.

Cheers,
Samuel.


> Signed-off-by: Axel Lin <axel.lin@...il.com>
> ---
>  drivers/mfd/ab3100-otp.c |   16 ++++++++--------
>  1 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/mfd/ab3100-otp.c b/drivers/mfd/ab3100-otp.c
> index 2d14655..939b876 100644
> --- a/drivers/mfd/ab3100-otp.c
> +++ b/drivers/mfd/ab3100-otp.c
> @@ -202,7 +202,7 @@ static int __init ab3100_otp_probe(struct platform_device *pdev)
>  
>  	err = ab3100_otp_read(otp);
>  	if (err)
> -		return err;
> +		goto err_otp_read;
>  
>  	dev_info(&pdev->dev, "AB3100 OTP readout registered\n");
>  
> @@ -211,21 +211,21 @@ static int __init ab3100_otp_probe(struct platform_device *pdev)
>  		err = device_create_file(&pdev->dev,
>  					 &ab3100_otp_attrs[i]);
>  		if (err)
> -			goto out_no_sysfs;
> +			goto err_create_file;
>  	}
>  
>  	/* debugfs entries */
>  	err = ab3100_otp_init_debugfs(&pdev->dev, otp);
>  	if (err)
> -		goto out_no_debugfs;
> +		goto err_init_debugfs;
>  
>  	return 0;
>  
> -out_no_sysfs:
> -	for (i = 0; i < ARRAY_SIZE(ab3100_otp_attrs); i++)
> -		device_remove_file(&pdev->dev,
> -				   &ab3100_otp_attrs[i]);
> -out_no_debugfs:
> +err_init_debugfs:
> +err_create_file:
> +	while (--i >= 0)
> +		device_remove_file(&pdev->dev, &ab3100_otp_attrs[i]);
> +err_otp_read:
>  	kfree(otp);
>  	return err;
>  }
> -- 
> 1.5.4.3
> 
> 
> 

-- 
Intel Open Source Technology Centre
http://oss.intel.com/
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