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| Started by | Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
|---|---|
| First post | 2015-12-07 17:30 +0100 |
| Last post | 2015-12-07 17:30 +0100 |
| Articles | 1 — 1 participant |
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[PATCH 4.1 24/95] ARM: 8427/1: dma-mapping: add support for offset parameter in dma_mmap() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2015-12-07 17:30 +0100
| From | Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
|---|---|
| Date | 2015-12-07 17:30 +0100 |
| Subject | [PATCH 4.1 24/95] ARM: 8427/1: dma-mapping: add support for offset parameter in dma_mmap() |
| Message-ID | <qD6PM-6WV-7@gated-at.bofh.it> |
4.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Marek Szyprowski <m.szyprowski@samsung.com>
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>
---
arch/arm/mm/dma-mapping.c | 2 ++
1 file changed, 2 insertions(+)
--- 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 d
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) {
--
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