tty: Wait for SAK work before waiting for hangup work

SAK work may schedule hangup work (if TTY_SOFT_SAK is defined), thus
SAK work must be flushed before hangup work.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
index 7712091..37671fcc 100644
--- a/drivers/tty/tty_ldisc.c
+++ b/drivers/tty/tty_ldisc.c
@@ -506,8 +506,8 @@
  */
 static void tty_ldisc_flush_works(struct tty_struct *tty)
 {
-	flush_work(&tty->hangup_work);
 	flush_work(&tty->SAK_work);
+	flush_work(&tty->hangup_work);
 	flush_work(&tty->port->buf.work);
 }