diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index 85a30fb..0b2f6be 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -541,9 +541,10 @@ static void hci_uart_tty_close(struct tty_struct *tty)
 		cancel_work_sync(&hu->write_work);
 
 		if (hdev) {
-			if (test_bit(HCI_UART_REGISTERED, &hu->flags))
+			if (test_bit(HCI_UART_REGISTERED, &hu->flags)) {
 				hci_unregister_dev(hdev);
-			hci_free_dev(hdev);
+				hci_free_dev(hdev);
+			}
 		}
 		hu->proto->close(hu);
 	}
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index dcc0dc6..d013cfa 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1489,6 +1489,7 @@ void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
 				 int flag, struct sock *skip_sk);
 
 void hci_sock_dev_event(struct hci_dev *hdev, int event);
+void hci_release_hdev(struct hci_dev *hdev);
 
 #define HCI_MGMT_VAR_LEN	BIT(0)
 #define HCI_MGMT_NO_HDEV	BIT(1)
diff --git a/kernel/locking/lockdep_internals.h b/kernel/locking/lockdep_internals.h
index baca699..e6f16ee 100644
--- a/kernel/locking/lockdep_internals.h
+++ b/kernel/locking/lockdep_internals.h
@@ -90,13 +90,13 @@ enum {
  * conflicts and deadlocks.
  */
 #define MAX_LOCKDEP_ENTRIES	16384UL
-#define MAX_LOCKDEP_CHAINS_BITS	15
+#define MAX_LOCKDEP_CHAINS_BITS	17
 #define MAX_STACK_TRACE_ENTRIES	262144UL
 #define STACK_TRACE_HASH_SIZE	8192
 #else
 #define MAX_LOCKDEP_ENTRIES	32768UL
 
-#define MAX_LOCKDEP_CHAINS_BITS	16
+#define MAX_LOCKDEP_CHAINS_BITS	18
 
 /*
  * Stack-trace: tightly packed array of stack backtrace
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index cbbc34a..0db652e 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3452,7 +3452,7 @@ int hci_register_dev(struct hci_dev *hdev)
 EXPORT_SYMBOL(hci_register_dev);
 
 /* Unregister HCI device */
-void hci_unregister_dev(struct hci_dev *hdev)
+void hci_release_hdev(struct hci_dev *hdev)
 {
 	int id;
 
@@ -3462,14 +3462,6 @@ void hci_unregister_dev(struct hci_dev *hdev)
 
 	id = hdev->id;
 
-	write_lock(&hci_dev_list_lock);
-	list_del(&hdev->list);
-	write_unlock(&hci_dev_list_lock);
-
-	cancel_work_sync(&hdev->power_on);
-
-	hci_dev_do_close(hdev);
-
 	if (!test_bit(HCI_INIT, &hdev->flags) &&
 	    !hci_dev_test_flag(hdev, HCI_SETUP) &&
 	    !hci_dev_test_flag(hdev, HCI_CONFIG)) {
@@ -3514,10 +3506,20 @@ void hci_unregister_dev(struct hci_dev *hdev)
 	hci_blocked_keys_clear(hdev);
 	hci_dev_unlock(hdev);
 
-	hci_dev_put(hdev);
-
 	ida_simple_remove(&hci_index_ida, id);
 }
+
+void hci_unregister_dev(struct hci_dev *hdev)
+{
+	write_lock(&hci_dev_list_lock);
+	list_del(&hdev->list);
+	write_unlock(&hci_dev_list_lock);
+
+	cancel_work_sync(&hdev->power_on);
+	hci_dev_do_close(hdev);
+
+	hci_dev_put(hdev);
+}
 EXPORT_SYMBOL(hci_unregister_dev);
 
 /* Suspend HCI device */
diff --git a/net/bluetooth/hci_sysfs.c b/net/bluetooth/hci_sysfs.c
index 9874844..3553b14 100644
--- a/net/bluetooth/hci_sysfs.c
+++ b/net/bluetooth/hci_sysfs.c
@@ -83,6 +83,11 @@ void hci_conn_del_sysfs(struct hci_conn *conn)
 static void bt_host_release(struct device *dev)
 {
 	struct hci_dev *hdev = to_hci_dev(dev);
+
+	/* The hdev was registered */
+	if (hdev->workqueue)
+		hci_release_hdev(hdev);
+
 	kfree(hdev);
 	module_put(THIS_MODULE);
 }