tty: tty port zero baud open
Alan Cox [Fri, 2 Jan 2009 13:46:43 +0000 (13:46 +0000)]
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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/char/tty_port.c

index ff94182..0723664 100644 (file)
@@ -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 */