From: Johan Hovold <jhovold@gmail.com>
Date: Thu, 7 Mar 2013 14:55:49 +0000 (+0100)
Subject: TTY: wake up processes last at hangup
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=31ca020b;p=linux-beck.git

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 2aea2f91e271..73bc1d989d32 100644
--- 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);