Re: [3.0 regression] DMAR faults in iwlagn

[wwguy <wey-yi.w.guy@intel.com>]

On Tue, 2011-06-21 at 06:38 -0700, Johannes Berg wrote:
> On Mon, 2011-06-20 at 14:44 -0400, Andrew Lutomirski wrote:
> > On 3.0-git today, I get:
> > 
> > [   40.142872] DRHD: handling fault status reg 2
> > [   40.142892] DMAR:[DMA Write] Request device [03:00.0] fault addr ffe38000
> > [   40.142896] DMAR:[fault reason 05] PTE Write access is not set
> > 
> > lspci says:
> > 
> > 03:00.0 Network controller: Intel Corporation Centrino Ultimate-N 6300 (rev 35)
> > 
> > This seems to be triggered by interface state changes.  The driver
> > still works.  I don't see this on 2.6.39.1.
> 
> Thanks Andy. Do you happen to know if there's any way to figure out what
> ffe38000 was? Clearly the device is attempting to write something that
> we haven't mapped properly, but I'm not sure _what_?

Andy, did you have chance try wireless-testing tree, I could not see the
issue, but maybe we can bisect the problem if you also do't see the
problem there.

Thanks
Wey