linux-kernel - Re: [PATCH] ARM: EDMA: Use platform_get

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Message-ID: <20140221132416.GS27282@n2100.arm.linux.org.uk>
Date:	Fri, 21 Feb 2014 13:24:16 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Joel Fernandes <joelf@...com>
Cc:	Linux OMAP List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	nsekhar@...com
Subject: Re: [PATCH] ARM: EDMA: Use platform_get_resource functions for DT

On Thu, Feb 20, 2014 at 10:24:21PM -0600, Joel Fernandes wrote:
> diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c
> index dc95efc..ae0ccae 100644
> --- a/arch/arm/common/edma.c
> +++ b/arch/arm/common/edma.c
> @@ -1469,11 +1470,14 @@ static int edma_xbar_event_map(struct device *dev,
>  	if (!xbar_chans)
>  		return -ENOMEM;
>  
> -	ret = of_address_to_resource(node, 1, &res);
> -	if (ret)
> +	pdev = to_platform_device(dev);
> +	res = platform_get_resource_byname(pdev,
> +					   IORESOURCE_MEM,
> +					   "edma_xbar");
> +	if (!res)
>  		return -EIO;
>  
> -	xbar = devm_ioremap(dev, res.start, resource_size(&res));
> +	xbar = devm_ioremap(dev, res->start, resource_size(res));
>  	if (!xbar)
>  		return -ENOMEM;

Irrespective of what Mark said, this should be upgraded to use
devm_ioremap_resource() which does all the checking necessary (and
claims the resource.)  That can be done irrespective of this change.

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