fifo_bug 2490 drivers/tty/serial/8250/8250_port.c up->fifo_bug = true; fifo_bug 2584 drivers/tty/serial/8250/8250_port.c if ((baud < 2400 && !up->dma) || up->fifo_bug) { fifo_bug 2919 drivers/tty/serial/8250/8250_port.c up->fifo_bug) fifo_bug 98 include/linux/serial_8250.h bool fifo_bug; /* min RX trigger if enabled */