virtio-snd: remove redundant fields

VirtIOSoundPCM does not need a pointer to
VirtIOSound because each VirtIOSoundPCMStream
already carries a pointer to it.

Signed-off-by: Roman Kiryanov <rkir@google.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20260305042523.335493-2-rkir@google.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

hw/audio/virtio-snd.c

@@ -402,10 +402,10 @@ static void virtio_snd_pcm_close(VirtIOSoundPCMStream *stream)
     if (stream) {
         virtio_snd_pcm_flush(stream);
         if (stream->info.direction == VIRTIO_SND_D_OUTPUT) {
-            audio_be_close_out(stream->pcm->snd->audio_be, stream->voice.out);
+            audio_be_close_out(stream->s->audio_be, stream->voice.out);
             stream->voice.out = NULL;
         } else if (stream->info.direction == VIRTIO_SND_D_INPUT) {
-            audio_be_close_in(stream->pcm->snd->audio_be, stream->voice.in);
+            audio_be_close_in(stream->s->audio_be, stream->voice.in);
             stream->voice.in = NULL;
         }
     }
@@ -440,7 +440,6 @@ static uint32_t virtio_snd_pcm_prepare(VirtIOSound *s, uint32_t stream_id)
         stream = g_new0(VirtIOSoundPCMStream, 1);
         stream->active = false;
         stream->id = stream_id;
-        stream->pcm = &s->pcm;
         stream->s = s;
         stream->latency_bytes = 0;
         qemu_mutex_init(&stream->queue_mutex);
@@ -1064,7 +1063,6 @@ static void virtio_snd_realize(DeviceState *dev, Error **errp)
     vsnd->vmstate =
         qemu_add_vm_change_state_handler(virtio_snd_vm_state_change, vsnd);
 
-    vsnd->pcm.snd = vsnd;
     vsnd->pcm.streams =
         g_new0(VirtIOSoundPCMStream *, vsnd->snd_conf.streams);
     vsnd->pcm.pcm_params =

include/hw/audio/virtio-snd.h

@@ -122,7 +122,6 @@ struct VirtIOSoundPCMBuffer {
 };
 
 struct VirtIOSoundPCM {
-    VirtIOSound *snd;
     /*
      * PCM parameters are a separate field instead of a VirtIOSoundPCMStream
      * field, because the operation of PCM control requests is first
@@ -135,7 +134,6 @@ struct VirtIOSoundPCM {
 };
 
 struct VirtIOSoundPCMStream {
-    VirtIOSoundPCM *pcm;
     virtio_snd_pcm_info info;
     virtio_snd_pcm_set_params params;
     uint32_t id;