hda-audio: fix non-mixer codecs

They don't advertise mixer support, but still allow the guest change mixer settings. Add a check to avoid it. Signed-off-by: Gerd Hoffmann <[email protected]>
yinghaoxie · Apr 29, 2014 · 4843877 · 4843877
1 parent e2da502
commit 4843877
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/hw/audio/hda-codec.c b/hw/audio/hda-codec.c
@@ -261,6 +261,9 @@ static void hda_audio_set_amp(HDAAudioStream *st)
     left = left * 255 / QEMU_HDA_AMP_STEPS;
     right = right * 255 / QEMU_HDA_AMP_STEPS;
 
+    if (!st->state->mixer) {
+        return;
+    }
     if (st->output) {
         AUD_set_volume_out(st->voice.out, muted, left, right);
     } else {