linux-kernel - Re: [git pull] PCI fixes

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Message-ID: <20120106124649.146001d6@jbarnes-desktop>
Date:	Fri, 6 Jan 2012 12:46:49 -0800
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Yinghai Lu <yinghai@...nel.org>, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [git pull] PCI fixes

On Sun, 18 Dec 2011 14:14:13 -0800
Linus Torvalds <torvalds@...ux-foundation.org> wrote:

> On Sat, Dec 17, 2011 at 9:52 PM, Jesse Barnes <jbarnes@...tuousgeek.org> wrote:
> >
> > Crap, and after you guys spent so long coming up with a clean version.
> >
> > Linus, can you just apply this one on top? I think it's the one Yinghai and Ram agreed to.
> 
> Ok, applied, but I have to say that I hate it.
> 
> Why don't we just move the stupid iov indexes to the end, and then
> ignore them by not counting through them in
> __pci_enable_device_flags()? So the regular PCI code would always walk
> through the resources 0 .. PCI_BRIDGE_RESOURCES_END or something. And
> then the magic IOV code could look at its own ones that the generic
> code apparently doesn't even want to know about.
> 
> Hmm?

There was some talk awhile back of pulling the SR-IOV resources out of
the pci_dev resource array (adding a separate member to track them only
if CONFIG_PCI_IOV is enabled), that would probably be the way to go.
Then fix up whatever resource walking code that cares about IOV BARs
(there isn't much I think).

Any thoughts Yinghai?

Thanks,
-- 
Jesse Barnes, Intel Open Source Technology Center

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