VFF_FLUSH_B 180 drivers/dma/mediatek/mtk-uart-apdma.c mtk_uart_apdma_write(c, VFF_FLUSH, VFF_FLUSH_B); VFF_FLUSH_B 400 drivers/dma/mediatek/mtk-uart-apdma.c mtk_uart_apdma_write(c, VFF_FLUSH, VFF_FLUSH_B); VFF_FLUSH_B 403 drivers/dma/mediatek/mtk-uart-apdma.c status, status != VFF_FLUSH_B, 10, 100);