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>
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@ -1699,13 +1699,8 @@ isdn_tty_close(struct tty_struct *tty, struct file *filp)
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tty_ldisc_flush(tty);
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port->tty = NULL;
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info->ncarrier = 0;
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tty->closing = 0;
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if (port->blocked_open) {
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msleep_interruptible(500);
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wake_up_interruptible(&port->open_wait);
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}
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port->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
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wake_up_interruptible(&port->close_wait);
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tty_port_close_end(port, tty);
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#ifdef ISDN_DEBUG_MODEM_OPEN
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printk(KERN_DEBUG "isdn_tty_close normal exit\n");
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#endif
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