1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/usb/serial/airprime.c b/drivers/usb/serial/airprime.c
index 77bb893bf2e9..f156dba0300f 100644
--- a/drivers/usb/serial/airprime.c
+++ b/drivers/usb/serial/airprime.c
@@ -217,7 +217,10 @@ static void airprime_close(struct usb_serial_port *port, struct file * filp)
         priv->rts_state = 0;
         priv->dtr_state = 0;
 
-        airprime_send_setup(port);
+        mutex_lock(&port->serial->disc_mutex);
+        if (!port->serial->disconnected)
+                airprime_send_setup(port);
+        mutex_lock(&port->serial->disc_mutex);
 
         for (i = 0; i < NUM_READ_URBS; ++i) {
                 usb_kill_urb (priv->read_urbp[i]);