dma: Provide simple noop dma ops
We are going to require dma_ops for several common drivers, even for systems that do have an identity mapping. Lets provide some minimal no-op dma_ops that can be used for that purpose. Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: NJoerg Roedel <jroedel@suse.de> Signed-off-by: NAndy Lutomirski <luto@kernel.org> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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lib/dma-noop.c
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