iommu/dma-iommu.c: Convert to use vm_map_pages()

PATCH Superseded Souptick Joarder 1 participant 1 message Feb 13, 2019

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Memory management IOMMU IOMMU DMA-API layer

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Souptick Joarder

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2019-02-13 14:01 UTC #0 lore raw

PATCH v3 6/9 iommu/dma-iommu.c: Convert to use vm_map_pages()

Convert to use vm_map_pages() to map range of kernel memory to user vma.

Signed-off-by Souptick Joarder <[email protected]>

---
 drivers/iommu/dma-iommu.c | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

drivers/iommu/dma-iommu.c +1 ~~-11~~

index d19f3d6..bacebff 100644
@@ -620,17 +620,7 @@ struct page **iommu_dma_alloc(struct device *dev, size_t size, gfp_t gfp,
 
 int iommu_dma_mmap(struct page **pages, size_t size, struct vm_area_struct *vma)
 {
-	unsigned long uaddr = vma->vm_start;
-	unsigned int i, count = PAGE_ALIGN(size) >> PAGE_SHIFT;
-	int ret = -ENXIO;
-
-	for (i = vma->vm_pgoff; i < count && uaddr < vma->vm_end; i++) {
-		ret = vm_insert_page(vma, uaddr, pages[i]);
-		if (ret)
-			break;
-		uaddr += PAGE_SIZE;
-	}
-	return ret;
+	return vm_map_pages(vma, pages, PAGE_ALIGN(size) >> PAGE_SHIFT);
 }
 
 static dma_addr_t __iommu_dma_map(struct device *dev, phys_addr_t phys,

Signature · 1 line

1.9.1