--- drivers/usb/serial/mos7840.c

+++ drivers/usb/serial/mos7840.c

@@ -714,7 +714,6 @@ static void mos7840_bulk_in_callback(str

mos7840_port = urb->context;

if (!mos7840_port) {

dbg("%s", "NULL mos7840_port pointer");

- mos7840_port->read_urb_busy = false;

return;

}