linux-kernel - Re: 2.6.23-rc8-mm1, -rc7-mm1 kill audio on HP nx6325

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Date:	Tue, 25 Sep 2007 16:35:52 +0200
From:	Thomas Gleixner <tglx@...utronix.de>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Andrew Morton <akpm@...ux-foundation.org>, Andi Kleen <ak@...e.de>,
	Takashi Iwai <tiwai@...e.de>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.23-rc8-mm1, -rc7-mm1 kill audio on HP nx6325

On Tue, 2007-09-25 at 16:29 +0200, Rafael J. Wysocki wrote: 
> > > lookup failed for 18446604438082158592
> > > [--snipped some USB messages--]
> > > ALSA /home/rafael/src/mm/linux-2.6.23-rc8-mm1/sound/pci/hda/hda_intel.c:1756: hda-intel: ioremap error: 2349334528 16384
> > 
> > Stupid me, hex formatting would have been easier to read :)
> > 
> > Lookup failed for 0xFFFF 8100 8C08 0000
> > ioremap:          0x0000 0000 8C08 0000 length 16384
> > 
> > It seems, that this patch only reveals some other wreckage. The code is
> > called as part of ioremap, where it adjusts the caching attributes of
> > the mapping, which was setup right before change_page_attr_address() is
> > called.
> 
> Hm, it looks like the first address is a kernel one and the second one is
> physical, so they apparently match, which means that the lookup shouldn't fail,
> if I understand this correctly.

Yes, the lookup address is virtual and it should be the one, which was
mapped right before the call to change_page_attr_address(). I'm looking
into that right now.

	tglx


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