Index: dt_dev.c
===================================================================
RCS file: /cvs/src/sys/dev/dt/dt_dev.c,v
diff -u -p -r1.42 dt_dev.c
--- dt_dev.c	4 Dec 2024 09:37:33 -0000	1.42
+++ dt_dev.c	9 May 2025 00:16:55 -0000
@@ -371,7 +371,8 @@ dtalloc(void)
 		return NULL;
 	}
 
-	sc->ds_si = softintr_establish(IPL_SOFTCLOCK, dt_deferred_wakeup, sc);
+	sc->ds_si = softintr_establish(IPL_SOFTCLOCK | IPL_MPSAFE,
+	    dt_deferred_wakeup, sc);
 	if (sc->ds_si == NULL) {
 		dtfree(sc);
 		return NULL;