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Diffstat (limited to 'arch/x86/include/asm/dma-mapping.h')
-rw-r--r--arch/x86/include/asm/dma-mapping.h15
1 files changed, 10 insertions, 5 deletions
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h
index 0ee770d23d0..0f6c02f3b7d 100644
--- a/arch/x86/include/asm/dma-mapping.h
+++ b/arch/x86/include/asm/dma-mapping.h
@@ -14,7 +14,14 @@
#include <asm/swiotlb.h>
#include <asm-generic/dma-coherent.h>
-extern dma_addr_t bad_dma_address;
+#ifdef CONFIG_ISA
+# define ISA_DMA_BIT_MASK DMA_BIT_MASK(24)
+#else
+# define ISA_DMA_BIT_MASK DMA_BIT_MASK(32)
+#endif
+
+#define DMA_ERROR_CODE 0
+
extern int iommu_merge;
extern struct device x86_dma_fallback_dev;
extern int panic_on_overflow;
@@ -42,7 +49,7 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
if (ops->mapping_error)
return ops->mapping_error(dev, dma_addr);
- return (dma_addr == bad_dma_address);
+ return (dma_addr == DMA_ERROR_CODE);
}
#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
@@ -124,10 +131,8 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
return memory;
- if (!dev) {
+ if (!dev)
dev = &x86_dma_fallback_dev;
- gfp |= GFP_DMA;
- }
if (!is_device_dma_capable(dev))
return NULL;