From: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Date: Wed, 18 Jun 2014 13:37:10 +0000 (+0300)
Subject: Bluetooth: 6LoWPAN: Count module usage
X-Git-Tag: v3.17-rc1~106^2~73^2~87^2~180
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=18d93c176641cf7a3c0c452a6f03f46b5373d370;p=~emulex%2Finfiniband.git

Bluetooth: 6LoWPAN: Count module usage

Count how many 6LoWPAN connections there exists so that we
do not unload the module if there are still connections alive.

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
---

diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c
index ceffe20fcba..ba6c6416368 100644
--- a/net/bluetooth/6lowpan.c
+++ b/net/bluetooth/6lowpan.c
@@ -100,6 +100,8 @@ static inline bool peer_del(struct lowpan_dev *dev, struct lowpan_peer *peer)
 {
 	list_del(&peer->list);
 
+	module_put(THIS_MODULE);
+
 	if (atomic_dec_and_test(&dev->peer_count)) {
 		BT_DBG("last peer");
 		return true;
@@ -752,6 +754,9 @@ static inline void chan_ready_cb(struct l2cap_chan *chan)
 		}
 	}
 
+	if (!try_module_get(THIS_MODULE))
+		return;
+
 	add_peer_chan(chan, dev);
 	ifup(dev->netdev);
 }