diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index 3bcf3346658772e1a8efce24fd50072f5cbcf210..353798631903de1a12b429f0412d59c9d043de8b 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -283,7 +283,10 @@ static void serial_close(struct tty_struct *tty, struct file * filp) } if (port->open_count == 0) { - usb_autopm_put_interface(port->serial->interface); + mutex_lock(&port->serial->disc_mutex); + if (!port->serial->disconnected) + usb_autopm_put_interface(port->serial->interface); + mutex_unlock(&port->serial->disc_mutex); module_put(port->serial->type->driver.owner); }