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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>
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@ -115,6 +115,8 @@ static int ttyport_open(struct serdev_controller *ctrl)
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ktermios.c_cflag &= ~(CSIZE | PARENB);
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ktermios.c_cflag |= CS8;
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ktermios.c_cflag |= CRTSCTS;
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/* Hangups are not supported so make sure to ignore carrier detect. */
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ktermios.c_cflag |= CLOCAL;
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tty_set_termios(tty, &ktermios);
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set_bit(SERPORT_ACTIVE, &serport->flags);
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