TTY: isdn, use tty_port_close_end helper

The code does almost the same, so there we can leverage the helper's
code. The only difference is locking. The helper protects counts by a
spinlock. This never hurts and should be added to other code parts
too.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Karsten Keil <isdn@linux-pingi.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 7 deletions

diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
index ee8ba87ac524..50d7246b37a1 100644
--- a/drivers/isdn/i4l/isdn_tty.c
+++ b/drivers/isdn/i4l/isdn_tty.c
@@ -1699,13 +1699,8 @@ isdn_tty_close(struct tty_struct *tty, struct file *filp)
         tty_ldisc_flush(tty);
         port->tty = NULL;
         info->ncarrier = 0;
-        tty->closing = 0;
-        if (port->blocked_open) {
-                msleep_interruptible(500);
-                wake_up_interruptible(&port->open_wait);
-        }
-        port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
-        wake_up_interruptible(&port->close_wait);
+
+        tty_port_close_end(port, tty);
 #ifdef ISDN_DEBUG_MODEM_OPEN
         printk(KERN_DEBUG "isdn_tty_close normal exit\n");
 #endif