diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 89ecf0a80aa1..d8ba1633f93b 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1024,11 +1024,15 @@ static inline void hci_conn_drop(struct hci_conn *conn)
 	}
 }
 
+extern void show_stack(struct task_struct *task, unsigned long *sp);
 /* ----- HCI Devices ----- */
 static inline void hci_dev_put(struct hci_dev *d)
 {
 	BT_DBG("%s orig refcnt %d", d->name,
 	       kref_read(&d->dev.kobj.kref));
+	printk("%s orig refcnt %d, %s\n", d->name,
+	       kref_read(&d->dev.kobj.kref), __func__);
+	show_stack(NULL, NULL);
 
 	put_device(&d->dev);
 }
@@ -1037,6 +1041,9 @@ static inline struct hci_dev *hci_dev_hold(struct hci_dev *d)
 {
 	BT_DBG("%s orig refcnt %d", d->name,
 	       kref_read(&d->dev.kobj.kref));
+	printk("%s orig refcnt %d, %s\n", d->name,
+	       kref_read(&d->dev.kobj.kref), __func__);
+	show_stack(NULL, NULL);
 
 	get_device(&d->dev);
 	return d;