diff --git a/[refs] b/[refs]
index 45e2d0e3d301..21ea17b1e5a4 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c93f09402106f22601838ee2bb0d02bae934b5e5
+refs/heads/master: e31d5a05948e4478ba8396063d1e1f39880928e2
diff --git a/trunk/drivers/net/caif/caif_serial.c b/trunk/drivers/net/caif/caif_serial.c
index c669ec37483b..38c0186cfbc2 100644
--- a/trunk/drivers/net/caif/caif_serial.c
+++ b/trunk/drivers/net/caif/caif_serial.c
@@ -319,7 +319,7 @@ static int ldisc_open(struct tty_struct *tty)
 	sprintf(name, "cf%s", tty->name);
 	dev = alloc_netdev(sizeof(*ser), name, caifdev_setup);
 	ser = netdev_priv(dev);
-	ser->tty = tty;
+	ser->tty = tty_kref_get(tty);
 	ser->dev = dev;
 	debugfs_init(ser, tty);
 	tty->receive_room = N_TTY_BUF_SIZE;
@@ -352,6 +352,7 @@ static void ldisc_close(struct tty_struct *tty)
 	unregister_netdevice(ser->dev);
 	list_del(&ser->node);
 	debugfs_deinit(ser);
+	tty_kref_put(ser->tty);
 	if (!islocked)
 		rtnl_unlock();
 }