1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/usb/serial/visor.c b/drivers/usb/serial/visor.c
index c2347995c786..22b3f78a388c 100644
--- a/drivers/usb/serial/visor.c
+++ b/drivers/usb/serial/visor.c
@@ -362,7 +362,7 @@ static void visor_close (struct usb_serial_port *port, struct file * filp)
                         kfree (transfer_buffer);
                 }
         }
-        mutex_lock(&port->serial->disc_mutex);
+        mutex_unlock(&port->serial->disc_mutex);
 
         if (stats)
                 dev_info(&port->dev, "Bytes In = %d  Bytes Out = %d\n",