linux-kernel - Re: [PATCH] IOMMU-Tegra: gart: Delete an unnecessary check before the function call "vfree"

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Date:	Fri, 9 Jan 2015 07:58:16 +0100
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	Alexandre Courbot <gnurou@...il.com>,
	Hiroshi Doyu <hdoyu@...dia.com>,
	Jörg Rödel <joro@...tes.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	iommu@...ts.linux-foundation.org, linux-tegra@...r.kernel.org
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH] IOMMU-Tegra: gart: Delete an unnecessary check before the
 function call "vfree"

> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Thu, 5 Feb 2015 17:54:16 +0100
> 
> The vfree() function performs also input parameter validation.
> Thus the test around the call is not needed.
> 
> This issue was detected by using the Coccinelle software.
> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  drivers/iommu/tegra-gart.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
> index f722a0c..07a795a 100644
> --- a/drivers/iommu/tegra-gart.c
> +++ b/drivers/iommu/tegra-gart.c
> @@ -404,8 +404,7 @@ static int tegra_gart_remove(struct platform_device *pdev)
>  	struct gart_device *gart = platform_get_drvdata(pdev);
>  
>  	writel(0, gart->regs + GART_CONFIG);
> -	if (gart->savedata)
> -		vfree(gart->savedata);
> +	vfree(gart->savedata);
>  	gart_handle = NULL;
>  	return 0;
>  }
> 

Would you like to integrate this update suggestion
into another source code repository?

Regards,
Markus
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