uart_startup 998 drivers/tty/serial/serial_core.c retval = uart_startup(tty, state, 1); uart_startup 1166 drivers/tty/serial/serial_core.c ret = uart_startup(tty, state, 1); uart_startup 1796 drivers/tty/serial/serial_core.c ret = uart_startup(tty, state, 0);