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| author |   Marek Szyprowski <m.szyprowski@samsung.com> | 2013-01-16 15:41:02 +0100 |
|---|---|---|
| committer | Marek Szyprowski <m.szyprowski@samsung.com> | 2013-02-25 15:30:43 +0100 |
| commit | f8669bef11fadfe811a5d7d59cb327499edac088 (patch) | |
| tree | cbb8847bbdc46153e70e635644ac0346d6beec11 /arch/arm/mm/dma-mapping.c | |
| parent | ARM: dma-mapping: add support for CMA regions placed in highmem zone (diff) | |
| download | linux-dev-f8669bef11fadfe811a5d7d59cb327499edac088.tar.xz linux-dev-f8669bef11fadfe811a5d7d59cb327499edac088.zip | |
ARM: dma-mapping: use himem for DMA buffers for IOMMU-mapped devices
IOMMU can provide access to any memory page, so there is no point in
limiting the allocated pages only to lowmem, once other parts of
dma-mapping subsystem correctly supports himem pages.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 94d7359074c2..2163af4b31b8 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -1095,12 +1095,17 @@ static struct page **__iommu_alloc_buffer(struct device *dev, size_t size, return pages; } + /* + * IOMMU can map any pages, so himem can also be used here + */ + gfp |= __GFP_NOWARN | __GFP_HIGHMEM; + while (count) { int j, order = __fls(count); - pages[i] = alloc_pages(gfp | __GFP_NOWARN, order); + pages[i] = alloc_pages(gfp, order); while (!pages[i] && order) - pages[i] = alloc_pages(gfp | __GFP_NOWARN, --order); + pages[i] = alloc_pages(gfp, --order); if (!pages[i]) goto error; |