FDT_DMA_WRITE
if (req->dreq_dir == FDT_DMA_WRITE) {
req.dreq_dir = FDT_DMA_WRITE;
req->dreq_dir = FDT_DMA_WRITE;
if (req->dreq_dir == FDT_DMA_WRITE)
ch->ch_req.dreq_dir = FDT_DMA_WRITE;
ch->ch_req.dreq_dir = FDT_DMA_WRITE;