diff options
Diffstat (limited to 'drivers/usb/serial/sierra.c')
| -rw-r--r-- | drivers/usb/serial/sierra.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c index 953bdf8827d..4c925e3e8a6 100644 --- a/drivers/usb/serial/sierra.c +++ b/drivers/usb/serial/sierra.c @@ -597,7 +597,10 @@ static void sierra_close(struct usb_serial_port *port, struct file *filp) portdata->dtr_state = 0; if (serial->dev) { - sierra_send_setup(port); + mutex_lock(&serial->disc_mutex); + if (!serial->disconnected) + sierra_send_setup(port); + mutex_unlock(&serial->disc_mutex); /* Stop reading/writing urbs */ for (i = 0; i < N_IN_URB; i++) |