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arm: remove arch specific dma_supported implementation

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And instead wire it up as method for all the dma_map_ops instances.

Note that the code seems a little fishy for dmabounce and iommu, but
for now I'd like to preserve the existing behavior 1:1.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig
2017-05-22 11:20:18 +02:00
parent 19ad53e498
commit 418a7a7e4f
4 changed files with 8 additions and 5 deletions
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2
arch/arm/include/asm/dma-iommu.h
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@@ -35,5 +35,7 @@ int arm_iommu_attach_device(struct device *dev,
struct dma_iommu_mapping *mapping);
void arm_iommu_detach_device(struct device *dev);
int arm_dma_supported(struct device *dev, u64 mask);
#endif /* __KERNEL__ */
#endif

3
arch/arm/include/asm/dma-mapping.h
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@@ -20,9 +20,6 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
return &arm_dma_ops;
}
#define HAVE_ARCH_DMA_SUPPORTED 1
extern int dma_supported(struct device *dev, u64 mask);
#ifdef __arch_page_to_dma
#error Please update to __arch_pfn_to_dma
#endif