iommu breaks usb after resume

From: Pavel Machek
Date: Thu Mar 20 2008 - 07:15:39 EST


Hi!

On 64-bit machine with 4GB ram (8core from amd), iommu breaks USB
after swsusp. iommu=soft fixes that issue.

I guess iommu handling in arch/x86/kernel/ should have some
suspend/resume support, as it manipulates hardware registers...?
Pavel
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