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Christoph Hellwig authored
Return DMA_MAPPING_ERROR instead of 0 on a dma mapping failure and let the core dma-mapping code handle the rest. Note that the existing code used AMD_IOMMU_MAPPING_ERROR to check from a 0 return from the IOVA allocator, which is replaced with an explicit 0 as in the implementation and other users of that interface. Signed-off-by:
Christoph Hellwig <hch@lst.de> Acked-by:
Linus Torvalds <torvalds@linux-foundation.org>
b3aa14f0