* [PATCH v3 6/9] iommu/dma-iommu.c: Convert to use vm_map_pages()
@ 2019-02-13 14:05 Souptick Joarder
0 siblings, 0 replies; only message in thread
From: Souptick Joarder @ 2019-02-13 14:05 UTC (permalink / raw)
To: akpm, willy, mhocko, joro, linux, robin.murphy
Cc: iommu, linux-kernel, linux-mm
Convert to use vm_map_pages() to map range of kernel
memory to user vma.
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
---
drivers/iommu/dma-iommu.c | 12 +-----------
1 file changed, 1 insertion(+), 11 deletions(-)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index d19f3d6..bacebff 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -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,
--
1.9.1
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