From e31d5a05948e4478ba8396063d1e1f39880928e2 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@linux.intel.com>
Date: Wed, 7 Apr 2010 16:50:00 -0700
Subject: caif: tty's are kref objects so take a reference

I don't think this can be abused in this case but do things properly.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/caif/caif_serial.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'drivers/net')

diff --git a/drivers/net/caif/caif_serial.c b/drivers/net/caif/caif_serial.c
index c669ec3..38c0186 100644
--- a/drivers/net/caif/caif_serial.c
+++ b/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();
 }
-- 
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