Bluetooth: Comments and style fixes

Add comments to timer implementation and style fixes.
Signed-off-by: NAndrei Emeltchenko <andrei.emeltchenko@intel.com>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NGustavo Padovan <gustavo@padovan.org>

include/net/bluetooth/l2cap.h

@@ -622,21 +622,26 @@ static inline void l2cap_chan_unlock(struct l2cap_chan *chan)
 }
 
 static inline void l2cap_set_timer(struct l2cap_chan *chan,
-					struct delayed_work *work, long timeout)
+				   struct delayed_work *work, long timeout)
 {
 	BT_DBG("chan %p state %s timeout %ld", chan,
-					state_to_string(chan->state), timeout);
+	       state_to_string(chan->state), timeout);
 
+	/* If delayed work cancelled do not hold(chan)
+	   since it is already done with previous set_timer */
 	if (!cancel_delayed_work(work))
 		l2cap_chan_hold(chan);
+
 	schedule_delayed_work(work, timeout);
 }
 
 static inline bool l2cap_clear_timer(struct l2cap_chan *chan,
-					struct delayed_work *work)
+				     struct delayed_work *work)
 {
 	bool ret;
 
+	/* put(chan) if delayed work cancelled otherwise it
+	   is done in delayed work function */
 	ret = cancel_delayed_work(work);
 	if (ret)
 		l2cap_chan_put(chan);