linux-kernel - Re: Please revert: PCI: fix IDE legacy mode resources

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Message-Id: <1196917447.7033.17.camel@pasglop>
Date:	Thu, 06 Dec 2007 16:04:07 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Yoichi Yuasa <yoichi_yuasa@...peaks.co.jp>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...e.de>, Ralf Baechle <ralf@...ux-mips.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: Please revert: PCI: fix IDE legacy mode resources


On Thu, 2007-12-06 at 13:34 +0900, Yoichi Yuasa wrote:
> > I don't understand how his fix can work on MIPS nor why the previous
> > code didn't, but I don't know how MIPS does its remapping tricks,
> > however it will definitely -not- work on powerpc (and will break a
> > couple of machines out there).
> 
> MIPS pcibios_fixup_bus() converts RAW BAR values(including offset) to
> resource values. How does it fix up on powerpc?

Same thing. We expect resources to contain raw values before . What I
don't understand is thus why you are calling resource_to_bus on 0x1f0
which is -not- a resource value, but is already a BAR value...

Ben.


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