Currently, the DMA channel calculates its data transferred only at network device driver. When other devices like UART or SPI etc, transfers data by DMA mode, but it always shows 0 at /sys/class/dma/dma0chan*/bytes_transferred. It will possibly mislead user that the DMA engine does not work.
This patch add a new function which will calculate how many the data has been transferred after doing it by DMA mode. It can be used by other modules and also simplify current duplicated code. Add the interface when UART transfer data by Designware DMA engine. It will calculate the data already tranferred in the DMA channel. If the patch work, I will add the interface to other modules when needed. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
