--- zzzz-none-000/linux-4.4.60/drivers/usb/serial/console.c	2017-04-08 07:53:53.000000000 +0000
+++ scorpion-7490-727/linux-4.4.60/drivers/usb/serial/console.c	2021-02-04 17:41:59.000000000 +0000
@@ -189,6 +189,7 @@
 	tty_kref_put(tty);
  reset_open_count:
 	port->port.count = 0;
+	info->port = NULL;
 	usb_autopm_put_interface(serial->interface);
  error_get_interface:
 	usb_serial_put(serial);