Remove unused variables

Author: Cuda-Chen

virtio-snd.c

@@ -495,7 +495,6 @@ static void virtio_snd_read_pcm_prepare(const virtio_snd_pcm_hdr_t *query,
     props->v.guest_playing = 0;
     props->v.stream_id = stream_id;
 
-    uint32_t period_bytes = props->pp.period_bytes;
     uint32_t channels = props->pp.channels;
     uint32_t rate = pcm_rate_tbl[props->pp.rate];
 
@@ -513,7 +512,6 @@ static void virtio_snd_read_pcm_prepare(const virtio_snd_pcm_hdr_t *query,
     uint32_t cnfa_period_bytes = bps_rate / 10;
     /* Calculate the period size (in frames) for CNFA . */
     uint32_t cnfa_period_frames = cnfa_period_bytes / VSND_CNFA_FRAME_SZ;
-    uint32_t period_frames = period_bytes / VSND_CNFA_FRAME_SZ;
 
     /* The buffer size in frames when calling CNFAInit()
      * is actually period size (i.e., period size then divide
@@ -522,7 +520,6 @@ static void virtio_snd_read_pcm_prepare(const virtio_snd_pcm_hdr_t *query,
     props->audio_host =
         CNFAInit(NULL, "semu-virtio-snd", virtio_snd_cb, rate, 0, channels, 0,
                  cnfa_period_frames, NULL, NULL, &props->v);
-    uint32_t sz = props->pp.buffer_bytes;
     pthread_mutex_init(&props->lock.lock, NULL);
     pthread_cond_init(&props->lock.readable, NULL);
     pthread_cond_init(&props->lock.writable, NULL);
@@ -846,7 +843,8 @@ static int virtio_snd_tx_desc_handler(virtio_snd_state_t *vsnd,
     }
 
     int idx = 0;
-    uint32_t stream_id;
+    uint32_t
+        stream_id; /* FIXME: solve uninitialized warning of this variable */
     uintptr_t base = (uintptr_t) vsnd->ram;
     uint32_t ret_len = 0;
     list_for_each_entry (node, &q, q) {