linux-kernel - [PATCH 4/4] Intel pci: Use coherent DMA mask when requested

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Message-ID: <4D9E15E0.5060000@sgi.com>
Date:	Thu, 07 Apr 2011 12:52:00 -0700
From:	Mike Travis <travis@....com>
To:	David Woodhouse <dwmw2@...radead.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	Mike Habeck <habeck@....com>, iommu@...ts.linux-foundation.org,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	Chris Wright <chrisw@...s-sol.org>
Subject: [PATCH 4/4] Intel pci: Use coherent DMA mask when requested

    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>
Reviewed-by: Mike Habeck <habeck@....com>
Acked-by: Chris Wright <chrisw@...s-sol.org>
---
 drivers/pci/intel-iommu.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- linux.orig/drivers/pci/intel-iommu.c
+++ linux/drivers/pci/intel-iommu.c
@@ -2582,8 +2582,7 @@ 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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