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Date: Fri, 21 Mar 2008 14:27:45 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Pavel Machek <pavel@ucw.cz>
Cc: Andi Kleen <andi@firstfloor.org>,
       kernel list <linux-kernel@vger.kernel.org>, Greg KH <greg@kroah.com>
Subject: Re: iommu breaks usb after resume
Message-ID: <20080321132745.GK27245@elte.hu>
References: <20080320111429.GA14764@elf.ucw.cz>
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* Pavel Machek <pavel@ucw.cz> wrote:

> 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...?

agreed ...

	Ingo