Re: kern/52424 (Panic running usr.bin/mixerctl/t_mixerctl test)

[Nathanial Sloss <nat%netbsd.org@localhost>]

Please Try the attached patch to see if it solves the problem.

Best regards,

Nat

Index: src/sys/dev/audio.c
===================================================================
RCS file: /cvsroot/src/sys/dev/audio.c,v
retrieving revision 1.368
diff -u -p -r1.368 audio.c
--- src/sys/dev/audio.c	9 Jul 2017 12:08:39 -0000	1.368
+++ src/sys/dev/audio.c	24 Jul 2017 03:23:20 -0000
@@ -5807,6 +5807,9 @@ audio_query_devinfo(struct audio_softc *
 
 	KASSERT(mutex_owned(sc->sc_lock));
 
+	if (sc->sc_static_nmixer_states == 0 || sc->sc_nmixer_states == 0)
+		goto hardware;
+
 	if (di->index >= sc->sc_static_nmixer_states - 1 &&
 	    di->index < sc->sc_nmixer_states) {
 		if (di->index == sc->sc_static_nmixer_states - 1) {
@@ -5838,7 +5841,7 @@ audio_query_devinfo(struct audio_softc *
 		return 0;
 	}
 
-
+hardware:
 	return sc->hw_if->query_devinfo(sc->hw_hdl, di);
 }