iommu: remove the mapping_error dma_map_ops method

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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>

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Christoph Hellwig 2018-11-21 19:28:34 +01:00

parent 887712a0a5

commit b3aa14f022

1 changed files with 5 additions and 13 deletions

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18

drivers/iommu/amd_iommu.c

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