diff options
| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2015-08-28 09:42:09 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-12-09 14:03:14 -0500 |
| commit | c1c6e3d704033ec56c158c25af29246892d2aed9 (patch) | |
| tree | dbc50267d9957f0769adac4de12c344660206463 | |
| parent | 19c61dfda03fe9d8290366f55d765a83ce459394 (diff) | |
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 <m.szyprowski@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 5bbfe56c5bc6..64d7486262e5 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -1406,6 +1406,8 @@ 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) { |