Add support for debug_dma_mapping_error() call to avoid warning from
debug_dma_unmap() interface when it checks for mapping error checked
status. Without this patch, device driver failed to check map error
warning is generated.
Signed-off-by: NShuah Khan <shuah.khan@hp.com>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NJoerg Roedel <joro@8bytes.org>