Commit cda64188 authored Nov 03, 2017 by Johan Hovold Committed by Greg Kroah-Hartman Nov 28, 2017

serdev: ttyport: ignore carrier detect to avoid hangups



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 <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 51899a63

drivers/tty/serdev/serdev-ttyport.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -115,6 +115,8 @@ 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);

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