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>

1 files changed, 5 insertions, 0 deletions

diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c
index ceffe20fcbaa..ba6c64163685 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);
 }