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Subject: Re: BUG in drivers/dma/ioat/dma_v2.c:314
From: David Woodhouse <dwmw2@infradead.org>
To: Dan Williams <dan.j.williams@intel.com>
Cc: Chris Li <lkml@chrisli.org>, linux-kernel <linux-kernel@vger.kernel.org>
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Date: Wed, 07 Jul 2010 19:07:56 +0100
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On Wed, 2010-07-07 at 10:47 -0700, Dan Williams wrote:
> Chris this change will make the driver's dma mapping calls succeed which 
> means we once again need to be prepared for the case where the engine's 
> iommu is not configured correctly. 

It ought to succeed but do nothing -- just return the physical address
as if you have no IOMMU (which for this device you don't).

-- 
David Woodhouse                            Open Source Technology Centre
David.Woodhouse@intel.com                              Intel Corporation