linux-kernel - Re: [PATCH 4/12] PCI PM: Make it possible to force using INTx for PCIe PME signaling

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Date:	Fri, 08 Jan 2010 15:08:03 -0500 (EST)
From:	Len Brown <lenb@...nel.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Matthew Garrett <mjg59@...f.ucam.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	LKML <linux-kernel@...r.kernel.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Alan Stern <stern@...land.harvard.edu>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Linux PCI <linux-pci@...r.kernel.org>,
	Oliver Neukum <oliver@...kum.org>,
	Bjorn Helgaas <bjorn.helgaas@...com>,
	Shaohua Li <shaohua.li@...el.com>,
	Francois Romieu <romieu@...zoreil.com>
Subject: Re: [PATCH 4/12] PCI PM: Make it possible to force using INTx for PCIe
 PME signaling

> > > This scares me a little... seems like we're not restoring some state on
> > > resume that's needed for MSIs to work?  Looks fine though.
> > 
> > Yeah, that was my concern. We debugged this a little on IRC and didn't 
> > get anywhere, though, so probably need to find someone who knows more 
> > about MSIs...
> 
> I'd rather say someone who knows more about ICH7. :-)
> 
> MSIs work just fine after resume for the other devices in the same box,
> so I'd say it's a chipset issue.

Hmmm, do all the ICH7 boxes behave the same way?

Yesterday MSI announced a netbook running Suse/Moblin,
so there is hope for more technical work w/ MSI to support Linux...

It is a bit worrysome to go out of the gate to need a DMI blacklist
for relatively new hardware.

cheers,
Len Brown, Intel Open Source Technology Center


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