#ifndef __BACKPORT_LINUX_DMA_MAPPING_H
#define __BACKPORT_LINUX_DMA_MAPPING_H
#include_next <linux/dma-mapping.h>

#ifndef DMA_MAPPING_ERROR
/*
 * A dma_addr_t can hold any valid DMA or bus address for the platform.  It can
 * be given to a device to use as a DMA source or target.  It is specific to a
 * given device and there may be a translation between the CPU physical address
 * space and the bus address space.
 *
 * DMA_MAPPING_ERROR is the magic error code if a mapping failed.  It should not
 * be used directly in drivers, but checked for using dma_mapping_error()
 * instead.
 */
#define DMA_MAPPING_ERROR		(~(dma_addr_t)0)
#endif /* DMA_MAPPING_ERROR */

#endif /* __BACKPORT_LINUX_DMA_MAPPING_H */