From 78c6cccadb6ead2dab503f95aefdbfb2ae409a32 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Fri, 12 Apr 2013 10:32:28 +0200 Subject: [PATCH] TTY: synclink: fix DTR being raised on hang up Make sure to check ASYNC_INITIALISED before raising DTR when waking up from blocked open in 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/synclink.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c index 72d607101f90..8eaf1ab8addb 100644 --- a/drivers/tty/synclink.c +++ b/drivers/tty/synclink.c @@ -3308,7 +3308,7 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, port->blocked_open++; while (1) { - if (tty->termios.c_cflag & CBAUD) + if (C_BAUD(tty) && test_bit(ASYNCB_INITIALIZED, &port->flags)) tty_port_raise_dtr_rts(port); set_current_state(TASK_INTERRUPTIBLE);