linux-kernel - Re: [PATCH] imx_drm: ipu_v3: fix invalid free of devm

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Message-ID: <20130319103321.GN1906@pengutronix.de>
Date:	Tue, 19 Mar 2013 11:33:21 +0100
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	Silviu-Mihai Popescu <silviupopescu1990@...il.com>
Cc:	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] imx_drm: ipu_v3: fix invalid free of devm_* allocated
 data

On Sat, Mar 16, 2013 at 02:02:36PM +0200, Silviu-Mihai Popescu wrote:
> The objects allocated by devm_* APIs are managed by devres and are freed
> when the device is detached. There is no need to use kfree() explicitly.

Not only 'no need', it's simply wrong.

> 
> Signed-off-by: Silviu-Mihai Popescu <silviupopescu1990@...il.com>

Acked-by: Sascha Hauer <s.hauer@...gutronix.de>

Sascha

> ---
>  drivers/staging/imx-drm/ipu-v3/ipu-dp.c |    1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/staging/imx-drm/ipu-v3/ipu-dp.c b/drivers/staging/imx-drm/ipu-v3/ipu-dp.c
> index 26aecaf..113b046 100644
> --- a/drivers/staging/imx-drm/ipu-v3/ipu-dp.c
> +++ b/drivers/staging/imx-drm/ipu-v3/ipu-dp.c
> @@ -316,7 +316,6 @@ int ipu_dp_init(struct ipu_soc *ipu, struct device *dev, unsigned long base)
>  
>  	priv->base = devm_ioremap(dev, base, PAGE_SIZE);
>  	if (!priv->base) {
> -		kfree(priv);
>  		return -ENOMEM;
>  	}
>  
> -- 
> 1.7.9.5
> 
> 

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