[08/29] nozomi: quick fix for the close/close bug

[Greg KH]

2.6.32-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Alan Cox <alan@xxxxxxxxxxxxxxx>

commit eeec32a731631a9bad9abb21c626b9f2840bee0d upstream.

Nozomi goes wrong if you get the sequence

	open
	open
	close

	[stuff]
	close

which turns out to occur on some ppp type setups.

This is a quick patch up for the problem. It's not really fixing Nozomi
which completely fails to implement tty open/close semantics and all the
other needed stuff. Doing it right is a rather more invasive patch set and
not one that will backport.

Signed-off-by: Alan Cox <alan@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/char/nozomi.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/char/nozomi.c
+++ b/drivers/char/nozomi.c
@@ -1629,10 +1629,10 @@ static void ntty_close(struct tty_struct
 
 	dc->open_ttys--;
 	port->count--;
-	tty_port_tty_set(port, NULL);
 
 	if (port->count == 0) {
 		DBG1("close: %d", nport->token_dl);
+		tty_port_tty_set(port, NULL);
 		spin_lock_irqsave(&dc->spin_mutex, flags);
 		dc->last_ier &= ~(nport->token_dl);
 		writew(dc->last_ier, dc->reg_ier);


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