From: Alan Cox <alan@xxxxxxxxxx> If we have no speed set at some point then we should not raise DTR/RTS at that point when opening as the tty is not ready Signed-off-by: Alan Cox <alan@xxxxxxxxxx> --- drivers/char/tty_port.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/drivers/char/tty_port.c b/drivers/char/tty_port.c index ff94182..0723664 100644 --- a/drivers/char/tty_port.c +++ b/drivers/char/tty_port.c @@ -216,7 +216,8 @@ int tty_port_block_til_ready(struct tty_port *port, while (1) { /* Indicate we are open */ - tty_port_raise_dtr_rts(port); + if (tty->termios->c_cflag & CBAUD) + tty_port_raise_dtr_rts(port); set_current_state(TASK_INTERRUPTIBLE); /* Check for a hangup or uninitialised port. Return accordingly */ -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html