linux-kernel - [07/89] intel-iommu: Use coherent DMA mask when requested

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Date:	Wed, 15 Jun 2011 16:59:30 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Mike Travis <travis@....com>,
	Chris Wright <chrisw@...s-sol.org>,
	David Woodhouse <David.Woodhouse@...el.com>
Subject: [07/89] intel-iommu: Use coherent DMA mask when requested

2.6.39-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Mike Travis <travis@....com>

commit c681d0ba1252954208220ad32248a3e8e2fc98e4 upstream.

The __intel_map_single function is not honoring the passed in DMA mask.
This results in not using the coherent DMA mask when called from
intel_alloc_coherent().

Signed-off-by: Mike Travis <travis@....com>
Acked-by: Chris Wright <chrisw@...s-sol.org>
Reviewed-by: Mike Habeck <habeck@....com>
Signed-off-by: David Woodhouse <David.Woodhouse@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/pci/intel-iommu.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -2606,8 +2606,7 @@ static dma_addr_t __intel_map_single(str
 	iommu = domain_get_iommu(domain);
 	size = aligned_nrpages(paddr, size);
 
-	iova = intel_alloc_iova(hwdev, domain, dma_to_mm_pfn(size),
-				pdev->dma_mask);
+	iova = intel_alloc_iova(hwdev, domain, dma_to_mm_pfn(size), dma_mask);
 	if (!iova)
 		goto error;
 


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