linux-kernel - Re: [patch 2.6.24-rc1] resource

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Date:	Thu, 25 Oct 2007 13:29:39 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	David Brownell <david-b@...bell.net>
Cc:	Jeff Garzik <jeff@...zik.org>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg KH <greg@...ah.com>
Subject: Re: [patch 2.6.24-rc1] resource_len() utility function

> So you'd suggest having search utilities (as with platform_bus)
> returning resource indices not resources?

That seems a bad idea to me

> Thing is, BARs are usually well defined, but when folk glue
> resources together they use whatever order is convenient on
> that particular platform.  And different platforms can have
> different numbers and types of resources, etc.

Far better I think that pci_ functions that take BAR values end up as
wrappers of the form

	pci_iomap(pdev, bar)
		return dev_iomap_resource(&pdev->resource[bar]);

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