linux-kernel - Re: [PATCH 3/3] sdhci-pltfm: Do not print errors in case of an extended iomem size

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Date:	Wed, 17 Mar 2010 07:02:52 +0100
From:	Richard Röjfors 
	<richard.rojfors@...agicore.com>
To:	Anton Vorontsov <avorontsov@...mvista.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	David Vrabel <david.vrabel@....com>,
	Pierre Ossman <pierre@...man.eu>, Ben Dooks <ben@...tec.co.uk>,
	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] sdhci-pltfm: Do not print errors in case of an extended
 iomem size

On 3/16/10 7:34 PM, Anton Vorontsov wrote:
> Some hosts have an extended SDHCI iomem size, so the driver should
> only print errors if the iomem size is less than 0x100.

With this change you allow a bigger resource than we really need.
I think you should also change request_mem_region and ioremap to only
request and map the actual needed size. (0x100)

> 
> Signed-off-by: Anton Vorontsov <avorontsov@...mvista.com>
> ---
>  drivers/mmc/host/sdhci-pltfm.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
> index 217b911..b6ee0d7 100644
> --- a/drivers/mmc/host/sdhci-pltfm.c
> +++ b/drivers/mmc/host/sdhci-pltfm.c
> @@ -61,7 +61,7 @@ static int __devinit sdhci_pltfm_probe(struct platform_device *pdev)
>  		goto err;
>  	}
>  
> -	if (resource_size(iomem) != 0x100)
> +	if (resource_size(iomem) < 0x100)
>  		dev_err(&pdev->dev, "Invalid iomem size. You may "
>  			"experience problems.\n");
>  

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