From e584a02cf517537a3d13c7f85ced45fd07ab85cd Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Thu, 7 Mar 2013 15:55:50 +0100 Subject: [PATCH] TTY: fix DTR being raised on hang up Make sure to check ASYNC_INITIALISED before raising DTR when waking up from blocked open in tty_port_block_til_ready. Currently DTR could get raised at hang up as a blocked process would raise DTR unconditionally before checking for hang up and returning. Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_port.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index 73bc1d989d32..7e3eaf4eb9fe 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -388,7 +388,7 @@ int tty_port_block_til_ready(struct tty_port *port, while (1) { /* Indicate we are open */ - if (tty->termios.c_cflag & CBAUD) + if (C_BAUD(tty) && test_bit(ASYNCB_INITIALIZED, &port->flags)) tty_port_raise_dtr_rts(port); prepare_to_wait(&port->open_wait, &wait, TASK_INTERRUPTIBLE); -- 2.39.5