linux-kernel - Re: [PATCH v2] drivers/media/platform/s5p-tv/sdo

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Message-id: <506024D5.1050007@samsung.com>
Date:	Mon, 24 Sep 2012 11:16:05 +0200
From:	Tomasz Stanislawski <t.stanislaws@...sung.com>
To:	Peter Senna Tschudin <peter.senna@...il.com>
Cc:	Mauro Carvalho Chehab <mchehab@...radead.org>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] drivers/media/platform/s5p-tv/sdo_drv.c: fix error
 return code

Hi.

On 09/06/2012 10:38 AM, Peter Senna Tschudin wrote:
> From: Peter Senna Tschudin <peter.senna@...il.com>
> 
> Convert a nonnegative error return code to a negative one, as returned
> elsewhere in the function.
> 
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> (
> if@p1 (\(ret < 0\|ret != 0\))
>  { ... return ret; }
> |
> ret@p1 = 0
> )
> ... when != ret = e1
>     when != &ret
> *if(...)
> {
>   ... when != ret = e2
>       when forall
>  return ret;
> }
> 
> // </smpl>
> 
> Signed-off-by: Peter Senna Tschudin <peter.senna@...il.com>

Acked-by: Tomasz Stanislawski <t.stanislaws@...sung.com>

> 
> ---
>  drivers/media/platform/s5p-tv/sdo_drv.c |    3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/media/platform/s5p-tv/sdo_drv.c b/drivers/media/platform/s5p-tv/sdo_drv.c
> index ad68bbe..58cf56d 100644
> --- a/drivers/media/platform/s5p-tv/sdo_drv.c
> +++ b/drivers/media/platform/s5p-tv/sdo_drv.c
> @@ -369,6 +369,7 @@ static int __devinit sdo_probe(struct platform_device *pdev)
>  	sdev->fout_vpll = clk_get(dev, "fout_vpll");
>  	if (IS_ERR_OR_NULL(sdev->fout_vpll)) {
>  		dev_err(dev, "failed to get clock 'fout_vpll'\n");
> +		ret = -ENXIO;
>  		goto fail_dacphy;
>  	}
>  	dev_info(dev, "fout_vpll.rate = %lu\n", clk_get_rate(sclk_vpll));
> @@ -377,11 +378,13 @@ static int __devinit sdo_probe(struct platform_device *pdev)
>  	sdev->vdac = devm_regulator_get(dev, "vdd33a_dac");
>  	if (IS_ERR_OR_NULL(sdev->vdac)) {
>  		dev_err(dev, "failed to get regulator 'vdac'\n");
> +		ret = -ENXIO;
>  		goto fail_fout_vpll;
>  	}
>  	sdev->vdet = devm_regulator_get(dev, "vdet");
>  	if (IS_ERR_OR_NULL(sdev->vdet)) {
>  		dev_err(dev, "failed to get regulator 'vdet'\n");
> +		ret = -ENXIO;
>  		goto fail_fout_vpll;
>  	}
>  
> 
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