nozomi: quick fix for the close/close bug
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@linux.intel.com> Cc: stable <stable@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -1651,10 +1651,10 @@ static void ntty_close(struct tty_struct *tty, struct file *file)
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dc->open_ttys--;
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port->count--;
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tty_port_tty_set(port, NULL);
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if (port->count == 0) {
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DBG1("close: %d", nport->token_dl);
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tty_port_tty_set(port, NULL);
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spin_lock_irqsave(&dc->spin_mutex, flags);
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dc->last_ier &= ~(nport->token_dl);
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writew(dc->last_ier, dc->reg_ier);
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