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 <kraxel@redhat.com>
2014-04-29 10:46:29 +02:00
1 changed files with 3 additions and 0 deletions
--- 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 {