linux-kernel - Re: [PATCH] Re-add quirk for ServerWorks bridge secondary buses

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Message-ID: <20110324182751.GC4835@earth.li>
Date:	Thu, 24 Mar 2011 11:27:51 -0700
From:	Jonathan McDowell <noodles@...th.li>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Re-add quirk for ServerWorks bridge secondary buses

On Wed, Mar 23, 2011 at 10:50:20PM -0700, Bjorn Helgaas wrote:
> On Wed, Mar 23, 2011 at 9:36 PM, Jonathan McDowell <noodles@...th.li> wrote:
> > I have a board with a ServerWorks CIOB-X2 bridge on it (2 in fact) that
> > is not having the secondary buses off it correctly discovered with
> > 2.6.38.
> 
> Is this a regression?  If so, what is the newest kernel that still
> worked? 

No, it's not strictly a regression; it's never worked without a patch
similar to this under 2.6. I'm trying to get us moved to a more recent
2.6 and working out what the minimal set patches are necessary against
mainline for that to work.

> Can you include a dmesg log?

Sure, attached.

> I assume that since you don't have a standard BIOS, you don't have
> ACPI?

Nope. Nor DMI. As previously mentioned there is a custom ASIC, but it's
hidden behind these bridges.

J.

-- 
                                            xmpp:noodles@...th.li
"A real revolution begins at learning. If you're not angry, you're
not paying attention." -- Tim McGrath

View attachment "2.6.38-dmesg" of type "text/plain" (19873 bytes)