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

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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 */

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