From 9bf66043f0c0a3b1447733e97ce885a41e8371d1 Mon Sep 17 00:00:00 2001 From: Marek Szyprowski Date: Fri, 28 Aug 2015 09:42:09 +0100 Subject: [PATCH] ARM: 8427/1: dma-mapping: add support for offset parameter in dma_mmap() commit 7e31210349e9e03a9a4dff31ab5f2bc83e8e84f5 upstream. IOMMU-based dma_mmap() implementation lacked proper support for offset parameter used in mmap call (it always assumed that mapping starts from offset zero). This patch adds support for offset parameter to IOMMU-based implementation. Signed-off-by: Marek Szyprowski Signed-off-by: Russell King Signed-off-by: Greg Kroah-Hartman --- arch/arm/mm/dma-mapping.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 67ae0f2ed983a..25ecc6afec4cf 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -1424,6 +1424,8 @@ static int arm_iommu_mmap_attrs(struct device *dev, struct vm_area_struct *vma, if (off >= nr_pages || (usize >> PAGE_SHIFT) > nr_pages - off) return -ENXIO; + pages += off; + do { int ret = vm_insert_page(vma, uaddr, *pages++); if (ret) { -- 2.47.2