Index: psycho.c
===================================================================
--- psycho.c	(revision 188124)
+++ psycho.c	(working copy)
@@ -695,6 +695,13 @@ psycho_set_intr(struct psycho_softc *sc, u_int ind
 	rid = index;
 	sc->sc_irq_res[index] = bus_alloc_resource_any(sc->sc_dev, SYS_RES_IRQ,
 	    &rid, RF_ACTIVE);
+	if (sc->sc_irq_res[index] == NULL && intrmap >= PSR_POWER_INT_MAP) {
+		/*
+		 * These interrupts aren't mandatory and not available
+		 * with all controllers (not even Psychos).
+		 */
+		return;
+	}
 	if (sc->sc_irq_res[index] == NULL ||
 	    INTIGN(vec = rman_get_start(sc->sc_irq_res[index])) != sc->sc_ign ||
 	    INTVEC(PSYCHO_READ8(sc, intrmap)) != vec ||