[PATCH 2/8] nozomi: quick fix for the close/close bug

From: Greg Kroah-Hartman
Date: Wed Jan 20 2010 - 18:51:26 EST

From: Alan Cox <alan@xxxxxxxxxxxxxxx>

Nozomi goes wrong if you get the sequence



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>
Cc: stable <stable@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
drivers/char/nozomi.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/char/nozomi.c b/drivers/char/nozomi.c
index 7d73cd4..2ad7d37 100644
--- a/drivers/char/nozomi.c
+++ b/drivers/char/nozomi.c
@@ -1651,10 +1651,10 @@ static void ntty_close(struct tty_struct *tty, struct file *file)

- 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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