dmaengine: Add helper function to convert direction value to text (816ebf48) · Commits · 戴 / test

dmaengine_get_direction_text() can be useful when the direction is printed out. The text is easier to comprehend than the number. Signed-off-by:

include/linux/dmaengine.h

+19 −0

Original line number	Diff line number	Diff line
		@@ -1545,4 +1545,23 @@ static inline struct dma_chan

		return __dma_request_channel(mask, fn, fn_param, NULL);
		}

		static inline char *
		dmaengine_get_direction_text(enum dma_transfer_direction dir)
		{
		switch (dir) {
		case DMA_DEV_TO_MEM:
		return "DEV_TO_MEM";
		case DMA_MEM_TO_DEV:
		return "MEM_TO_DEV";
		case DMA_MEM_TO_MEM:
		return "MEM_TO_MEM";
		case DMA_DEV_TO_DEV:
		return "DEV_TO_DEV";
		default:
		break;
		}

		return "invalid";
		}
		#endif /* DMAENGINE_H */