linux-kernel - Re: [PATCH] sm501.c: use resource

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Date:	Tue, 5 Jan 2010 20:02:31 +0100
From:	Samuel Ortiz <sameo@...ux.intel.com>
To:	H Hartley Sweeten <hartleys@...ionengravers.com>
Cc:	kernel list <linux-kernel@...r.kernel.org>,
	Ben Dooks <ben-linux@...ff.org>
Subject: Re: [PATCH] sm501.c: use resource_size()

On Fri, Dec 11, 2009 at 06:55:41PM -0500, H Hartley Sweeten wrote:
> The requested memory region is smaller than the actual ioremap().
> Use resource_size() to get the correct size.
Patch applied, thanks.

 
> Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
> Cc: Ben Dooks <ben-linux@...ff.org>
> Cc: Samuel Ortiz <sameo@...ux.intel.com>
> 
> ---
> 
> diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c
> index 0cc5eef..dc9ea95 100644
> --- a/drivers/mfd/sm501.c
> +++ b/drivers/mfd/sm501.c
> @@ -1430,7 +1430,7 @@ static int __devinit sm501_plat_probe(struct platform_device *dev)
>  	}
>  
>  	sm->regs_claim = request_mem_region(sm->io_res->start,
> -					    0x100, "sm501");
> +					    resource_size(sm->io_res), "sm501");
>  
>  	if (sm->regs_claim == NULL) {
>  		dev_err(&dev->dev, "cannot claim registers\n");
> @@ -1440,8 +1440,7 @@ static int __devinit sm501_plat_probe(struct platform_device *dev)
>  
>  	platform_set_drvdata(dev, sm);
>  
> -	sm->regs = ioremap(sm->io_res->start,
> -			   (sm->io_res->end - sm->io_res->start) - 1);
> +	sm->regs = ioremap(sm->io_res->start, resource_size(sm->io_res));
>  
>  	if (sm->regs == NULL) {
>  		dev_err(&dev->dev, "cannot remap registers\n");
> @@ -1645,7 +1644,7 @@ static int __devinit sm501_pci_probe(struct pci_dev *dev,
>  	sm->mem_res = &dev->resource[0];
>  
>  	sm->regs_claim = request_mem_region(sm->io_res->start,
> -					    0x100, "sm501");
> +					    resource_size(sm->io_res), "sm501");
>  	if (sm->regs_claim == NULL) {
>  		dev_err(&dev->dev, "cannot claim registers\n");
>  		err= -EBUSY; 

-- 
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