Patchwork [18/23] iommu/intel: small map_page cleanup

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Submitter Christoph Hellwig
Date Nov. 30, 2018, 1:22 p.m.
Message ID <20181130132231.16512-19-hch@lst.de>
Download mbox | patch
Permalink /patch/669069/
State New
Headers show

Comments

Christoph Hellwig - Nov. 30, 2018, 1:22 p.m.
Pass the page + offset to the low-level __iommu_map_single helper
(which gets renamed to fit the new calling conventions) as both
callers have the page at hand.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/iommu/intel-iommu.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

Patch

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 41a4b8808802..66b4444398ae 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -3597,9 +3597,11 @@  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;
@@ -3661,8 +3663,7 @@  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)
@@ -3753,9 +3754,8 @@  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);
+	*dma_handle = __intel_map_page(dev, page, 0, size, DMA_BIDIRECTIONAL,
+				       dev->coherent_dma_mask);
 	if (*dma_handle)
 		return page_address(page);
 	if (!dma_release_from_contiguous(dev, page, size >> PAGE_SHIFT))