linux-kernel - (eats disks) Re: iommu breaks usb after resume

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Message-ID: <20080327084724.GA566@elf.ucw.cz>
Date:	Thu, 27 Mar 2008 09:47:24 +0100
From:	Pavel Machek <pavel@....cz>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Andi Kleen <andi@...stfloor.org>,
	kernel list <linux-kernel@...r.kernel.org>,
	Greg KH <greg@...ah.com>, "Rafael J. Wysocki" <rjw@...k.pl>
Subject: (eats disks) Re: iommu breaks usb after resume

On Thu 2008-03-27 09:42:31, Pavel Machek wrote:
> On Thu 2008-03-27 00:00:17, Ingo Molnar wrote:
> > 
> > * Pavel Machek <pavel@....cz> wrote:
> > 
> > > @@ -733,8 +735,8 @@ static struct pci_driver agp_amd64_pci_d
> > >  	.probe		= agp_amd64_probe,
> > >  	.remove		= agp_amd64_remove,
> > >  #ifdef CONFIG_PM
> > > -	.suspend	= agp_amd64_suspend,
> > > -	.resume		= agp_amd64_resume,
> > > +	.suspend_late	= agp_amd64_suspend,
> > > +	.resume_early	= agp_amd64_resume,
> > >  #endif
> > 
> > ah, makes sense. I've queued up your fix in x86.git (sans the debug 
> > printks), please send your signoff once you can verify that it solves 
> > the hibernation hang on your box and we'll push it into 2.6.25.
> 
> You have my signed-off from previous email, but...
> 
> it does not solve a problem here -- see the mail to andi. It may still
> be good idea to take it (but I do not think it should go to 2.6.25),
> but may machine still does not work.

Hmm, seems like this is pretty dangerous area. On resume, system is in
half-alive state: it responds to commands but IOMMU is just not
configure.

Unfortunately, it decided to write crap over my boot sector :-(.
									Pavel
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