linux-kernel - Re: USB problem on x86_64: nommu_map

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Message-Id: <200810141300.29502.oliver@neukum.org>
Date:	Tue, 14 Oct 2008 13:00:28 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	Nicolas Bareil <nico@...ir.org>
Cc:	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: USB problem on x86_64: nommu_map_single() issue?

Am Dienstag, 14. Oktober 2008 12:45:00 schrieb Nicolas Bareil:

Hello,

> Hi Oliver,
> 
> On Tue, Oct 14, 2008 at 11:48:47AM +0200, Oliver Neukum wrote:
> > > On 2.6.27, I can't use any USB device (mass storage, mouse) anymore on my x86_64 system, the devices
> > > are not detected: lsusb returns nothing except the hub.
> > 
> > Is this a regression? Did it work on earlier kernels?
> 
> Yes this is a regression: USB works in 2.6.26.x with (almost) the same configuration.

This a an IOMMU problem, not really a USB problem. Can you bisect the problem?

	Regards
		Oliver
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