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x86: fix nommu_alloc_coherent allocation with NULL device argument 

We need to use __GFP_DMA for NULL device argument (fallback_dev) with
pci-nommu. It's a hack for ISA (and some old code) so we need to use
GFP_DMA.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
FUJITA Tomonori 2008-09-08 18:10:12 +09:00 committed by Ingo Molnar
parent de9f521fb7
commit 8a53ad675f
2 changed files with 3 additions and 2 deletions
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3
arch/x86/kernel/pci-nommu.c
View File

@ -80,7 +80,6 @@ nommu_alloc_coherent(struct device *hwdev, size_t size,
int node;
struct page *page;
gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
gfp |= __GFP_ZERO;
dma_mask = hwdev->coherent_dma_mask;
@ -93,7 +92,7 @@ nommu_alloc_coherent(struct device *hwdev, size_t size,
node = dev_to_node(hwdev);
#ifdef CONFIG_X86_64
if (dma_mask <= DMA_32BIT_MASK)
if (dma_mask <= DMA_32BIT_MASK && !(gfp & GFP_DMA))
gfp |= GFP_DMA32;
#endif

2
include/asm-x86/dma-mapping.h
View File

@ -246,6 +246,8 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
struct dma_mapping_ops *ops = get_dma_ops(dev);
void *memory;
gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
return memory;