[RESEND PATCH v4 6/9] iommu/dma-iommu.c: Convert to use vm_map_pages()

From: Souptick Joarder <jrdr.linux@gmail.com>
To: akpm@linux-foundation.org, willy@infradead.org, mhocko@suse.com,
	joro@8bytes.org, linux@armlinux.org.uk, robin.murphy@arm.com
Cc: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
	linux-mm@kvack.org
Subject: [RESEND PATCH v4 6/9] iommu/dma-iommu.c: Convert to use vm_map_pages()
Date: Tue, 19 Mar 2019 07:58:19 +0530	[thread overview]
Message-ID: <80c3d220fc6ada73a88ce43ca049afb55a889258.1552921225.git.jrdr.linux@gmail.com> (raw)
In-Reply-To: <cover.1552921225.git.jrdr.linux@gmail.com>

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

