diff --git a/sys/dev/hifn/hifn7751.c b/sys/dev/hifn/hifn7751.c
--- a/sys/dev/hifn/hifn7751.c
+++ b/sys/dev/hifn/hifn7751.c
@@ -637,8 +637,6 @@
 
 	crypto_unregister_all(sc->sc_cid);
 
-	bus_generic_detach(dev);	/*XXX should be no children, right? */
-
 	bus_teardown_intr(dev, sc->sc_irq, sc->sc_intrhand);
 	/* XXX don't store rid */
 	bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq);
diff --git a/sys/dev/safe/safe.c b/sys/dev/safe/safe.c
--- a/sys/dev/safe/safe.c
+++ b/sys/dev/safe/safe.c
@@ -464,7 +464,6 @@
 	mtx_destroy(&sc->sc_ringmtx);
 	safe_dma_free(sc, &sc->sc_ringalloc);
 
-	bus_generic_detach(dev);
 	bus_teardown_intr(dev, sc->sc_irq, sc->sc_ih);
 	bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq);