[PATCH 43/75] tty: tty port zero baud open

Alan Cox
2009-01-02T13:46:29Z

From: Alan Cox <alan@redhat.com>

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@redhat.com>
---

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 */