Exynos4-IS driver relied on the way the ARM DMA-IOMMU glue code worked -
mainly it relied on the fact that the allocator used first-fit algorithm
and the first allocated buffer were at 0x0 DMA/IOVA address. This is not
true for the generic IOMMU-DMA glue code that will be used for ARM
architecture soon, so add the needed DMA attribute to force such behavior
of the DMA-mapping code.
Signed-off-by: Marek Szyprowski <m.szyprow...@samsung.com>
---
drivers/media/platform/exynos4-is/fimc-is.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/media/platform/exynos4-is/fimc-is.c
b/drivers/media/platform/exynos4-is/fimc-is.c
index 41b841a96338..9d3556eae5d3 100644
--- a/drivers/media/platform/exynos4-is/fimc-is.c
+++ b/drivers/media/platform/exynos4-is/fimc-is.c
@@ -335,8 +335,9 @@ static int fimc_is_alloc_cpu_memory(struct fimc_is *is)
{
struct device *dev = &is->pdev->dev;
- is->memory.vaddr = dma_alloc_coherent(dev, FIMC_IS_CPU_MEM_SIZE,
- &is->memory.addr, GFP_KERNEL);
+ is->memory.vaddr = dma_alloc_attrs(dev, FIMC_IS_CPU_MEM_SIZE,
+ &is->memory.addr, GFP_KERNEL,
+ DMA_ATTR_LOW_ADDRESS);
if (is->memory.vaddr == NULL)
return -ENOMEM;
--
2.17.1
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