diff options
Diffstat (limited to 'arch/x86/kernel/pci-dma_64.c')
| -rw-r--r-- | arch/x86/kernel/pci-dma_64.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/x86/kernel/pci-dma_64.c b/arch/x86/kernel/pci-dma_64.c index e7d45cf8225..6eacd58e451 100644 --- a/arch/x86/kernel/pci-dma_64.c +++ b/arch/x86/kernel/pci-dma_64.c @@ -39,6 +39,8 @@ dma_alloc_pages(struct device *dev, gfp_t gfp, unsigned order) return page ? page_address(page) : NULL; } +#define dma_alloc_from_coherent_mem(dev, size, handle, ret) (0) +#define dma_release_coherent(dev, order, vaddr) (0) /* * Allocate memory for a coherent mapping. */ @@ -50,6 +52,10 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, unsigned long dma_mask = 0; u64 bus; + + if (dma_alloc_from_coherent_mem(dev, size, dma_handle, &memory)) + return memory; + if (!dev) dev = &fallback_dev; dma_mask = dev->coherent_dma_mask; @@ -141,9 +147,12 @@ EXPORT_SYMBOL(dma_alloc_coherent); void dma_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t bus) { + int order = get_order(size); WARN_ON(irqs_disabled()); /* for portability */ + if (dma_release_coherent(dev, order, vaddr)) + return; if (dma_ops->unmap_single) dma_ops->unmap_single(dev, bus, size, 0); - free_pages((unsigned long)vaddr, get_order(size)); + free_pages((unsigned long)vaddr, order); } EXPORT_SYMBOL(dma_free_coherent); |