};
/*
+ * Handles VIRTIO_SND_R_PCM_PREPARE.
+ *
+ * @s: VirtIOSound device
+ * @cmd: The request command queue element from VirtIOSound cmdq field
+ */
+static void virtio_snd_handle_pcm_prepare(VirtIOSound *s,
+ virtio_snd_ctrl_command *cmd)
+{
+ uint32_t stream_id;
+ size_t msg_sz = iov_to_buf(cmd->elem->out_sg,
+ cmd->elem->out_num,
+ sizeof(virtio_snd_hdr),
+ &stream_id,
+ sizeof(stream_id));
+
+ stream_id = le32_to_cpu(stream_id);
+ cmd->resp.code = msg_sz == sizeof(stream_id)
+ ? virtio_snd_pcm_prepare(s, stream_id)
+ : cpu_to_le32(VIRTIO_SND_S_BAD_MSG);
+}
+
+/*
* Handles VIRTIO_SND_R_PCM_START.
*
* @s: VirtIOSound device
virtio_snd_handle_pcm_set_params(s, cmd);
break;
case VIRTIO_SND_R_PCM_PREPARE:
+ virtio_snd_handle_pcm_prepare(s, cmd);
+ break;
case VIRTIO_SND_R_PCM_RELEASE:
cmd->resp.code = cpu_to_le32(VIRTIO_SND_S_NOT_SUPP);
break;