--- hdac.c.orig	2020-10-09 01:02:31.000000000 +0100
+++ hdac.c	2020-10-13 04:53:55.559605000 +0100
@@ -2149,6 +2149,7 @@
 	DEVMETHOD(device_detach,	hdac_detach),
 	DEVMETHOD(device_suspend,	hdac_suspend),
 	DEVMETHOD(device_resume,	hdac_resume),
+	DEVMETHOD(device_shutdown,	hdac_detach),
 	/* Bus interface */
 	DEVMETHOD(bus_get_dma_tag,	hdac_get_dma_tag),
 	DEVMETHOD(bus_print_child,	hdac_print_child),