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Diffstat (limited to 'drivers/usb/serial/option.c')
| -rw-r--r-- | drivers/usb/serial/option.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c index bbbe1b96200..5e8bf1bc1e5 100644 --- a/drivers/usb/serial/option.c +++ b/drivers/usb/serial/option.c @@ -641,7 +641,10 @@ static void option_close(struct usb_serial_port *port, struct file *filp) portdata->dtr_state = 0; if (serial->dev) { - option_send_setup(port); + mutex_lock(&serial->disc_mutex); + if (!serial->disconnected) + option_send_setup(port); + mutex_unlock(&serial->disc_mutex); /* Stop reading/writing urbs */ for (i = 0; i < N_IN_URB; i++) |