1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/usb/serial/cp2101.c b/drivers/usb/serial/cp2101.c
index cd5f71b7f637..f3ca66017a03 100644
--- a/drivers/usb/serial/cp2101.c
+++ b/drivers/usb/serial/cp2101.c
@@ -348,7 +348,10 @@ static void cp2101_close (struct usb_serial_port *port, struct file * filp)
         usb_kill_urb(port->write_urb);
         usb_kill_urb(port->read_urb);
 
-        cp2101_set_config_single(port, CP2101_UART, UART_DISABLE);
+        mutex_lock(&port->serial->disc_mutex);
+        if (!port->serial->disconnected)
+                cp2101_set_config_single(port, CP2101_UART, UART_DISABLE);
+        mutex_unlock(&port->serial->disc_mutex);
 }
 
 /*