Christoph Hellwig 4a47cbae04
dma-direct: improve swiotlb error reporting ...
Untangle the way how dma_direct_map_page calls into swiotlb to be able
to properly report errors where the swiotlb DMA address overflows the
mask separately from overflows in the !swiotlb case. This means that
siotlb_map now has to do a little more work that duplicates
dma_direct_map_page, but doing so greatly simplifies the calling
convention.
Signed-off-by: Christoph Hellwig <hch@lst.de >
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com >
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