------------[ cut here ]------------
ODEBUG: free active (active state 0) object: ffff8880721b9040 object type: timer_list hint: snd_usbmidi_error_timer+0x0/0x660 sound/usb/midi.c:2343
WARNING: CPU: 1 PID: 6889 at lib/debugobjects.c:615 debug_print_object+0x16b/0x1e0 lib/debugobjects.c:612