TTY: clean up port shutdown

Untangle port-shutdown logic and make sure the initialised flag is
always cleared for non-console ports.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c
index 7f38eea..2aea2f9 100644 (file)
--- a/drivers/tty/tty_port.c
+++ b/drivers/tty/tty_port.c
@@ -199,9 +199,14 @@ EXPORT_SYMBOL(tty_port_tty_set);
 static void tty_port_shutdown(struct tty_port *port)
 {
        mutex_lock(&port->mutex);
-       if (port->ops->shutdown && !port->console &&
-               test_and_clear_bit(ASYNCB_INITIALIZED, &port->flags))
+       if (port->console)
+               goto out;
+
+       if (test_and_clear_bit(ASYNCB_INITIALIZED, &port->flags)) {
+               if (port->ops->shutdown)
                        port->ops->shutdown(port);
+       }
+out:
        mutex_unlock(&port->mutex);
 }