X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=drivers%2Fiommu%2Fintel-iommu.c;h=63b6ce78492aada84756b417293444c2c7b2b454;hb=457fa3469a65a524be04412f5cd497fa3b11c9fd;hp=adc2c9619e566d71a5cd5a1a913075a5294c89ce;hpb=fbc4904c287778ddb74bf6060ac9dec51992fc53;p=uclinux-h8%2Flinux.git

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index adc2c9619e56..63b6ce78492a 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -3607,9 +3607,11 @@ static int iommu_no_mapping(struct device *dev)
 	return 0;
 }
 
-static dma_addr_t __intel_map_single(struct device *dev, phys_addr_t paddr,
-				     size_t size, int dir, u64 dma_mask)
+static dma_addr_t __intel_map_page(struct device *dev, struct page *page,
+				   unsigned long offset, size_t size, int dir,
+				   u64 dma_mask)
 {
+	phys_addr_t paddr = page_to_phys(page) + offset;
 	struct dmar_domain *domain;
 	phys_addr_t start_paddr;
 	unsigned long iova_pfn;
@@ -3625,7 +3627,7 @@ static dma_addr_t __intel_map_single(struct device *dev, phys_addr_t paddr,
 
 	domain = get_valid_domain_for_dev(dev);
 	if (!domain)
-		return 0;
+		return DMA_MAPPING_ERROR;
 
 	iommu = domain_get_iommu(domain);
 	size = aligned_nrpages(paddr, size);
@@ -3663,7 +3665,7 @@ error:
 		free_iova_fast(&domain->iovad, iova_pfn, dma_to_mm_pfn(size));
 	pr_err("Device %s request: %zx@%llx dir %d --- failed\n",
 		dev_name(dev), size, (unsigned long long)paddr, dir);
-	return 0;
+	return DMA_MAPPING_ERROR;
 }
 
 static dma_addr_t intel_map_page(struct device *dev, struct page *page,
@@ -3671,8 +3673,7 @@ static dma_addr_t intel_map_page(struct device *dev, struct page *page,
 				 enum dma_data_direction dir,
 				 unsigned long attrs)
 {
-	return __intel_map_single(dev, page_to_phys(page) + offset, size,
-				  dir, *dev->dma_mask);
+	return __intel_map_page(dev, page, offset, size, dir, *dev->dma_mask);
 }
 
 static void intel_unmap(struct device *dev, dma_addr_t dev_addr, size_t size)
@@ -3763,10 +3764,9 @@ static void *intel_alloc_coherent(struct device *dev, size_t size,
 		return NULL;
 	memset(page_address(page), 0, size);
 
-	*dma_handle = __intel_map_single(dev, page_to_phys(page), size,
-					 DMA_BIDIRECTIONAL,
-					 dev->coherent_dma_mask);
-	if (*dma_handle)
+	*dma_handle = __intel_map_page(dev, page, 0, size, DMA_BIDIRECTIONAL,
+				       dev->coherent_dma_mask);
+	if (*dma_handle != DMA_MAPPING_ERROR)
 		return page_address(page);
 	if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT))
 		__free_pages(page, order);
@@ -3875,11 +3875,6 @@ static int intel_map_sg(struct device *dev, struct scatterlist *sglist, int nele
 	return nelems;
 }
 
-static int intel_mapping_error(struct device *dev, dma_addr_t dma_addr)
-{
-	return !dma_addr;
-}
-
 static const struct dma_map_ops intel_dma_ops = {
 	.alloc = intel_alloc_coherent,
 	.free = intel_free_coherent,
@@ -3887,7 +3882,6 @@ static const struct dma_map_ops intel_dma_ops = {
 	.unmap_sg = intel_unmap_sg,
 	.map_page = intel_map_page,
 	.unmap_page = intel_unmap_page,
-	.mapping_error = intel_mapping_error,
 	.dma_supported = dma_direct_supported,
 };