diff --git a/[refs] b/[refs]
index c06cb3d67ce7..870328fc7cd7 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 3f8bc5e4da29c7e05edeca6b475abb4fb01a5a13
+refs/heads/master: 27b351c5546008c640b3e65152f60ca74b3706f1
diff --git a/trunk/drivers/usb/serial/quatech2.c b/trunk/drivers/usb/serial/quatech2.c
index 00e6c9bac8a3..d643a4d4d770 100644
--- a/trunk/drivers/usb/serial/quatech2.c
+++ b/trunk/drivers/usb/serial/quatech2.c
@@ -661,7 +661,9 @@ void qt2_process_read_urb(struct urb *urb)
 						 __func__);
 					break;
 				}
-				tty_flip_buffer_push(&port->port);
+
+				if (port_priv->is_open)
+					tty_flip_buffer_push(&port->port);
 
 				newport = *(ch + 3);
 
@@ -704,7 +706,8 @@ void qt2_process_read_urb(struct urb *urb)
 		tty_insert_flip_string(&port->port, ch, 1);
 	}
 
-	tty_flip_buffer_push(&port->port);
+	if (port_priv->is_open)
+		tty_flip_buffer_push(&port->port);
 }
 
 static void qt2_write_bulk_callback(struct urb *urb)