linux-kernel - [REBASE PATCH v5 6/9] iommu/dma-iommu.c: Convert to use vm_map

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Message-Id: <80c3d220fc6ada73a88ce43ca049afb55a889258.1552921225.git.jrdr.linux@gmail.com>
Date:   Tue, 16 Apr 2019 17:19:47 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     akpm@...ux-foundation.org, willy@...radead.org, mhocko@...e.com,
        kirill.shutemov@...ux.intel.com, vbabka@...e.cz, riel@...riel.com,
        sfr@...b.auug.org.au, rppt@...ux.vnet.ibm.com,
        peterz@...radead.org, linux@...linux.org.uk, robin.murphy@....com,
        iamjoonsoo.kim@....com, treding@...dia.com, keescook@...omium.org,
        m.szyprowski@...sung.com, stefanr@...6.in-berlin.de,
        hjc@...k-chips.com, heiko@...ech.de, airlied@...ux.ie,
        oleksandr_andrushchenko@...m.com, joro@...tes.org,
        pawel@...iak.com, kyungmin.park@...sung.com, mchehab@...nel.org,
        boris.ostrovsky@...cle.com, jgross@...e.com
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linux-arm-kernel@...ts.infradead.org,
        linux1394-devel@...ts.sourceforge.net,
        dri-devel@...ts.freedesktop.org,
        linux-rockchip@...ts.infradead.org, xen-devel@...ts.xen.org,
        iommu@...ts.linux-foundation.org, linux-media@...r.kernel.org,
        Souptick Joarder <jrdr.linux@...il.com>
Subject: [REBASE PATCH v5 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 <jrdr.linux@...il.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