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

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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>
This commit is contained in:
Marek Szyprowski 2015-08-28 09:42:09 +01:00 committed by Russell King
parent 371f0f085f
commit 7e31210349
1 changed files with 2 additions and 0 deletions
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arch/arm/mm/dma-mapping.c
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@ -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) {