Serdev currently does not support hangups so make sure to set CLOCAL to prevent loss of carrier from triggering one.
Note however that not all tty drivers honour CLOCAL. Signed-off-by: Johan Hovold <[email protected]> --- drivers/tty/serdev/serdev-ttyport.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c index a8ddcd2ac5ea..727664ef456c 100644 --- a/drivers/tty/serdev/serdev-ttyport.c +++ b/drivers/tty/serdev/serdev-ttyport.c @@ -141,6 +141,8 @@ static int ttyport_open(struct serdev_controller *ctrl) ktermios.c_cflag &= ~(CSIZE | PARENB); ktermios.c_cflag |= CS8; ktermios.c_cflag |= CRTSCTS; + /* Hangups are not supported so make sure to ignore carrier detect. */ + ktermios.c_cflag |= CLOCAL; tty_set_termios(tty, &ktermios); set_bit(SERPORT_ACTIVE, &serport->flags); -- 2.15.0
