virtsnd_pcm_msg_pending_num
unsigned int virtsnd_pcm_msg_pending_num(struct virtio_pcm_substream *vss);
vss->stopped = !!virtsnd_pcm_msg_pending_num(vss);
if (virtsnd_pcm_msg_pending_num(vss)) {
if (!virtsnd_pcm_msg_pending_num(vss))
if (virtsnd_pcm_msg_pending_num(vss)) {
!virtsnd_pcm_msg_pending_num(vss),