linux-kernel - Re: [PATCH 5/6] regulator: ti-abb: simplify platform_get_resource_byname/devm_ioremap

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Date:	Mon, 19 Aug 2013 11:10:41 +0200
From:	walter harms <wharms@....de>
To:	Julia Lawall <Julia.Lawall@...6.fr>
CC:	Liam Girdwood <lgirdwood@...il.com>,
	kernel-janitors@...r.kernel.org, Mark Brown <broonie@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/6] regulator: ti-abb: simplify platform_get_resource_byname/devm_ioremap_resource



Am 19.08.2013 10:51, schrieb Julia Lawall:
> From: Julia Lawall <Julia.Lawall@...6.fr>
> 
> Remove unneeded error handling on the result of a call to
> platform_get_resource_byname when the value is passed to devm_ioremap_resource.
> 
> A simplified version of the semantic patch that makes this change is as
> follows: (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @@
> expression pdev,res,e,e1;
> expression ret != 0;
> identifier l;
> @@
> 
>   res = platform_get_resource_byname(...);
> - if (res == NULL) { ... \(goto l;\|return ret;\) }
>   e = devm_ioremap_resource(e1, res);
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
> 
> ---
>  drivers/regulator/ti-abb-regulator.c |   10 ----------
>  1 file changed, 10 deletions(-)
> 
> diff --git a/drivers/regulator/ti-abb-regulator.c b/drivers/regulator/ti-abb-regulator.c
> index 3753ed0..d8e3e12 100644
> --- a/drivers/regulator/ti-abb-regulator.c
> +++ b/drivers/regulator/ti-abb-regulator.c
> @@ -717,11 +717,6 @@ static int ti_abb_probe(struct platform_device *pdev)
>  	/* Map ABB resources */
>  	pname = "base-address";
>  	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname);
> -	if (!res) {
> -		dev_err(dev, "Missing '%s' IO resource\n", pname);
> -		ret = -ENODEV;
> -		goto err;
> -	}
>  	abb->base = devm_ioremap_resource(dev, res);
>  	if (IS_ERR(abb->base)) {
>  		ret = PTR_ERR(abb->base);


is pname used by anything else ? (also below)

re,
 wh

> @@ -770,11 +765,6 @@ static int ti_abb_probe(struct platform_device *pdev)
>  
>  	pname = "ldo-address";
>  	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname);
> -	if (!res) {
> -		dev_dbg(dev, "Missing '%s' IO resource\n", pname);
> -		ret = -ENODEV;
> -		goto skip_opt;
> -	}
>  	abb->ldo_base = devm_ioremap_resource(dev, res);
>  	if (IS_ERR(abb->ldo_base)) {
>  		ret = PTR_ERR(abb->ldo_base);
> 
> --
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