--- zzzz-none-000/linux-3.10.107/drivers/usb/serial/console.c	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/drivers/usb/serial/console.c	2021-11-10 11:53:55.000000000 +0000
@@ -188,6 +188,7 @@
 	kfree(tty);
  reset_open_count:
 	port->port.count = 0;
+	info->port = NULL;
 	usb_autopm_put_interface(serial->interface);
  error_get_interface:
 	usb_serial_put(serial);