diff --git a/[refs] b/[refs]
index 42005fc34d75..21dd903f8aad 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 53ab34dc50ad99366257d34cdb8a84f24250d611
+refs/heads/master: ecb9eb8064ba705e9182772db28809a755c920e8
diff --git a/trunk/drivers/usb/serial/cp210x.c b/trunk/drivers/usb/serial/cp210x.c
index 4747d1c328ff..2c659553c07c 100644
--- a/trunk/drivers/usb/serial/cp210x.c
+++ b/trunk/drivers/usb/serial/cp210x.c
@@ -462,11 +462,7 @@ static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
 static void cp210x_close(struct usb_serial_port *port)
 {
 	usb_serial_generic_close(port);
-
-	mutex_lock(&port->serial->disc_mutex);
-	if (!port->serial->disconnected)
-		cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
-	mutex_unlock(&port->serial->disc_mutex);
+	cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
 }
 
 /*