diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index 963bb0309e25d34a44382bc3a8e9e0556cca72d1..ea6238ed5c0eaa095ada2c2b0f88aea27707dcbf 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -543,6 +543,8 @@ static void hci_uart_tty_close(struct tty_struct *tty)
 	}
 	clear_bit(HCI_UART_PROTO_SET, &hu->flags);
 
+	percpu_free_rwsem(&hu->proto_lock);
+
 	kfree(hu);
 }