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This function is internal to the DMA API implementation. Instead use the DMA API to properly unmap. Note that the DMA API usage in this driver is a disaster and urgently needs some work - it is missing all the unmaps, seems to do a secondary map where it looks like it should to a unmap in one place to work around cache coherency and the directions passed in seem to be partially wrong. Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Christian Lamparter <chunkeey@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>