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[3.0 regression] DMAR faults in iwlagn

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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.

--Andy
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