Refine comments

Author: Cuda-Chen

virtio-snd.c

@@ -614,12 +614,12 @@ static void virtio_snd_read_pcm_release(const virtio_snd_pcm_hdr_t *query,
 
     props->pp.hdr.hdr.code = VIRTIO_SND_R_PCM_RELEASE;
 
-    /* Tear down the PCM ring buffer. */
+    /* Tear down PCM buffer related locking attributes. */
     free(props->intermediate);
     pthread_mutex_destroy(&props->lock.lock);
     pthread_cond_destroy(&props->lock.readable);
     pthread_cond_destroy(&props->lock.writable);
-    /* Tear down the PCM buffer queue */
+    /* Tear down PCM buffer queue. */
     vsnd_buf_queue_node_t *tmp = NULL;
     vsnd_buf_queue_node_t *node;
     if (!list_empty(&props->buf_queue_head)) {
@@ -631,7 +631,7 @@ static void virtio_snd_read_pcm_release(const virtio_snd_pcm_hdr_t *query,
 
     CNFAClose(props->audio_host);
     fprintf(stderr, "pass CNFAclose\n");
-    /* Tear down stream related locking mechanisms */
+    /* Tear down stream related locking attributes. */
     pthread_mutex_destroy(&props->v.ctrl_mutex);
     pthread_cond_destroy(&props->v.ctrl_cond);