DW_SPI_RX_BUSY
if (test_bit(DW_SPI_RX_BUSY, &dws->dma_chan_busy))
clear_bit(DW_SPI_RX_BUSY, &dws->dma_chan_busy);
set_bit(DW_SPI_RX_BUSY, &dws->dma_chan_busy);
if (test_bit(DW_SPI_RX_BUSY, &dws->dma_chan_busy)) {
clear_bit(DW_SPI_RX_BUSY, &dws->dma_chan_busy);