linux-kernel - Re: [PATCH 8/10] drivers/video/imxfb.c: add missing clk

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Date:	Wed, 1 Jun 2011 19:49:15 +0200
From:	Sascha Hauer <s.hauer@...gutronix.de>
To:	Julia Lawall <julia@...u.dk>
Cc:	Sascha Hauer <kernel@...gutronix.de>,
	kernel-janitors@...r.kernel.org, Paul Mundt <lethal@...ux-sh.org>,
	linux-fbdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 8/10] drivers/video/imxfb.c: add missing clk_put

On Wed, Jun 01, 2011 at 07:10:11PM +0200, Julia Lawall wrote:
> From: Julia Lawall <julia@...u.dk>
> 
> Reorder the labels at the end of the function to correspond to the order in
> which the resources are allocated.
> 
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @r exists@
> expression e1,e2;
> statement S;
> @@
> 
> e1 = clk_get@p1(...);
> ... when != e1 = e2
>     when != clk_put(e1)
>     when any
> if (...) { ... when != clk_put(e1)
>                when != if (...) { ... clk_put(e1) ... }
> * return@p3 ...;
>  } else S
> // </smpl>
> 
> Signed-off-by: Julia Lawall <julia@...u.dk>

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

> 
> ---
>  drivers/video/imxfb.c |    4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c
> index d2ccfd6..f135dbe 100644
> --- a/drivers/video/imxfb.c
> +++ b/drivers/video/imxfb.c
> @@ -856,10 +856,10 @@ failed_platform_init:
>  		dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
>  			fbi->map_dma);
>  failed_map:
> -	clk_put(fbi->clk);
> -failed_getclock:
>  	iounmap(fbi->regs);
>  failed_ioremap:
> +	clk_put(fbi->clk);
> +failed_getclock:
>  	release_mem_region(res->start, resource_size(res));
>  failed_req:
>  	kfree(info->pseudo_palette);
> 
> 

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