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/stallion.c b/drivers/char/stallion.c
index 77eef61..e1e0dd8 100644
--- a/drivers/char/stallion.c
+++ b/drivers/char/stallion.c
@@ -833,40 +833,20 @@
pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
portp = tty->driver_data;
- if (portp == NULL)
- return;
+ BUG_ON(portp == NULL);
+
port = &portp->port;
- spin_lock_irqsave(&port->lock, flags);
- if (tty_hung_up_p(filp)) {
- spin_unlock_irqrestore(&port->lock, flags);
+ if (tty_port_close_start(port, tty, filp) == 0)
return;
- }
- if (tty->count == 1 && port->count != 1)
- port->count = 1;
- if (port->count-- > 1) {
- spin_unlock_irqrestore(&port->lock, flags);
- return;
- }
-
- port->count = 0;
- port->flags |= ASYNC_CLOSING;
-
/*
* May want to wait for any data to drain before closing. The BUSY
* flag keeps track of whether we are still sending or not - it is
* very accurate for the cd1400, not quite so for the sc26198.
* (The sc26198 has no "end-of-data" interrupt only empty FIFO)
*/
- tty->closing = 1;
-
- spin_unlock_irqrestore(&port->lock, flags);
-
- if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
- tty_wait_until_sent(tty, portp->closing_wait);
stl_waituntilsent(tty, (HZ / 2));
-
spin_lock_irqsave(&port->lock, flags);
portp->port.flags &= ~ASYNC_INITIALIZED;
spin_unlock_irqrestore(&port->lock, flags);
@@ -883,20 +863,9 @@
portp->tx.head = NULL;
portp->tx.tail = NULL;
}
- set_bit(TTY_IO_ERROR, &tty->flags);
- tty_ldisc_flush(tty);
- tty->closing = 0;
+ tty_port_close_end(port, tty);
tty_port_tty_set(port, NULL);
-
- if (port->blocked_open) {
- if (portp->close_delay)
- msleep_interruptible(jiffies_to_msecs(portp->close_delay));
- wake_up_interruptible(&portp->port.open_wait);
- }
-
- portp->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
- wake_up_interruptible(&port->close_wait);
}
/*****************************************************************************/