TTY: wake up processes last at hangup

Move wake up of processes on blocked-open and modem-status wait queues
to after port shutdown at hangup.

This way the woken up processes can use the ASYNC_INITIALIZED flag to
detect port shutdown.

Note that this is the order currently used by serial-core.

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 2aea2f9..73bc1d9 100644 (file)
--- a/drivers/tty/tty_port.c
+++ b/drivers/tty/tty_port.c
@@ -231,9 +231,9 @@ void tty_port_hangup(struct tty_port *port)
        }
        port->tty = NULL;
        spin_unlock_irqrestore(&port->lock, flags);
+       tty_port_shutdown(port);
        wake_up_interruptible(&port->open_wait);
        wake_up_interruptible(&port->delta_msr_wait);
-       tty_port_shutdown(port);
 }
 EXPORT_SYMBOL(tty_port_hangup);