[PATCH 1/3] dma-mapping: Add devm_ interface for dma_map_single()

dmam_map_single() and dmam_unmap_single() are the managed counterparts for the respective dma_* functions. Note that dmam_map_single() returns zero on failure, and not a value to be handled by dma_mapping_error(): The error check is done by dmam_map_single() to avoid the registration of a mapping

[PATCH 1/3] dma-mapping: Add devm_ interface for dma_map_single()

dmam_map_single() and dmam_unmap_single() are the managed counterparts for the respective dma_* functions. Note that dmam_map_single() returns zero on failure, and not a value to be handled by dma_mapping_error(): The error check is done by dmam_map_single() to avoid the registration of a mapping