tty: Introduce some close helpers for ports
Again this is a lot of common code we can unify
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/char/riscom8.c b/drivers/char/riscom8.c
index af34c20..9ac5feb 100644
--- a/drivers/char/riscom8.c
+++ b/drivers/char/riscom8.c
@@ -929,35 +929,11 @@
if (!port || rc_paranoia_check(port, tty->name, "close"))
return;
- spin_lock_irqsave(&port->port.lock, flags);
-
- if (tty_hung_up_p(filp))
- goto out;
-
bp = port_Board(port);
- if ((tty->count == 1) && (port->port.count != 1)) {
- printk(KERN_INFO "rc%d: rc_close: bad port count;"
- " tty->count is 1, port count is %d\n",
- board_No(bp), port->port.count);
- port->port.count = 1;
- }
- if (--port->port.count < 0) {
- printk(KERN_INFO "rc%d: rc_close: bad port count "
- "for tty%d: %d\n",
- board_No(bp), port_No(port), port->port.count);
- port->port.count = 0;
- }
- if (port->port.count)
- goto out;
- port->port.flags |= ASYNC_CLOSING;
- /*
- * Now we wait for the transmit buffer to clear; and we notify
- * the line discipline to only process XON/XOFF characters.
- */
- tty->closing = 1;
- spin_unlock_irqrestore(&port->port.lock, flags);
- if (port->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
- tty_wait_until_sent(tty, port->port.closing_wait);
+
+ if (tty_port_close_start(&port->port, tty, filp) == 0)
+ return;
+
/*
* At this point we stop accepting input. To do this, we
* disable the receive line status interrupts, and tell the
@@ -989,23 +965,8 @@
rc_shutdown_port(tty, bp, port);
rc_flush_buffer(tty);
spin_unlock_irqrestore(&riscom_lock, flags);
- tty_ldisc_flush(tty);
- spin_lock_irqsave(&port->port.lock, flags);
- tty->closing = 0;
- port->port.tty = NULL;
- if (port->port.blocked_open) {
- spin_unlock_irqrestore(&port->port.lock, flags);
- if (port->port.close_delay)
- msleep_interruptible(jiffies_to_msecs(port->port.close_delay));
- wake_up_interruptible(&port->port.open_wait);
- spin_lock_irqsave(&port->port.lock, flags);
- }
- port->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
- wake_up_interruptible(&port->port.close_wait);
-
-out:
- spin_unlock_irqrestore(&riscom_lock, flags);
+ tty_port_close_end(&port->port, tty);
}
static int rc_write(struct tty_struct *tty,