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n_tty: Factor packet mode status change for reuse 

Factor the packet mode status change from n_tty_flush_buffer
for use by follow-on patch.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2013-03-11 16:44:22 -04:00 committed by Greg Kroah-Hartman
parent 21622939fc
commit a30737ab7d
1 changed files with 14 additions and 10 deletions
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24
drivers/tty/n_tty.c
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@ -223,6 +223,18 @@ static void reset_buffer_flags(struct tty_struct *tty)
n_tty_set_room(tty);
}
static void n_tty_packet_mode_flush(struct tty_struct *tty)
{
unsigned long flags;
spin_lock_irqsave(&tty->ctrl_lock, flags);
if (tty->link->packet) {
tty->ctrl_status |= TIOCPKT_FLUSHREAD;
wake_up_interruptible(&tty->link->read_wait);
}
spin_unlock_irqrestore(&tty->ctrl_lock, flags);
}
/**
* n_tty_flush_buffer - clean input queue
* @tty: terminal device
@ -237,19 +249,11 @@ static void reset_buffer_flags(struct tty_struct *tty)
static void n_tty_flush_buffer(struct tty_struct *tty)
{
unsigned long flags;
/* clear everything and unthrottle the driver */
reset_buffer_flags(tty);
if (!tty->link)
return;
spin_lock_irqsave(&tty->ctrl_lock, flags);
if (tty->link->packet) {
tty->ctrl_status |= TIOCPKT_FLUSHREAD;
wake_up_interruptible(&tty->link->read_wait);
}
spin_unlock_irqrestore(&tty->ctrl_lock, flags);
if (tty->link)
n_tty_packet_mode_flush(tty);
}
/**