linux-kernel - Re: [PATCH 1/2] hwrng: atmel - Use devm_ioremap

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Date:	Wed, 12 Feb 2014 08:46:20 +0100
From:	Peter Korsgaard <peter@...sgaard.com>
To:	Jingoo Han <jg1.han@...sung.com>
Cc:	'Herbert Xu' <herbert@...dor.apana.org.au>,
	linux-kernel@...r.kernel.org,
	'Nicolas Ferre' <nicolas.ferre@...el.com>,
	'Peter Korsgaard' <jacmet@...site.dk>
Subject: Re: [PATCH 1/2] hwrng: atmel - Use devm_ioremap_resource()

>>>>> "Jingoo" == Jingoo Han <jg1.han@...sung.com> writes:

 > Use devm_ioremap_resource() in order to make the code simpler,
 > and remove redundant return value check of platform_get_resource()
 > because the value is checked by devm_ioremap_resource().

 > Signed-off-by: Jingoo Han <jg1.han@...sung.com>

Acked-by: Peter Korsgaard <jacmet@...site.dk>



 > ---
 >  drivers/char/hw_random/atmel-rng.c |   15 ++++-----------
 >  1 file changed, 4 insertions(+), 11 deletions(-)

 > diff --git a/drivers/char/hw_random/atmel-rng.c b/drivers/char/hw_random/atmel-rng.c
 > index bf9fc6b..dfeddf2 100644
 > --- a/drivers/char/hw_random/atmel-rng.c
 > +++ b/drivers/char/hw_random/atmel-rng.c
 > @@ -54,21 +54,14 @@ static int atmel_trng_probe(struct platform_device *pdev)
 >  	struct resource *res;
 >  	int ret;
 
 > -	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 > -	if (!res)
 > -		return -EINVAL;
 > -
 >  	trng = devm_kzalloc(&pdev->dev, sizeof(*trng), GFP_KERNEL);
 >  	if (!trng)
 >  		return -ENOMEM;
 
 > -	if (!devm_request_mem_region(&pdev->dev, res->start,
 > -				     resource_size(res), pdev->name))
 > -		return -EBUSY;
 > -
 > -	trng->base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
 > -	if (!trng->base)
 > -		return -EBUSY;
 > +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 > +	trng->base = devm_ioremap_resource(&pdev->dev, res);
 > +	if (IS_ERR(trng->base))
 > +		return PTR_ERR(trng->base);
 
 trng-> clk = clk_get(&pdev->dev, NULL);
 >  	if (IS_ERR(trng->clk))
 > -- 
 > 1.7.10.4




-- 
Bye, Peter Korsgaard
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