Commit 7e312103 authored Aug 28, 2015 by Marek Szyprowski Committed by Russell King Oct 03, 2015

ARM: 8427/1: dma-mapping: add support for offset parameter in dma_mmap()



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 <m.szyprowski@samsung.com>
Cc: stable@vger.kernel.org  # v3.6+
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent 371f0f08

arch/arm/mm/dma-mapping.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1418,6 +1418,8 @@ 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) {