VIRTIO_SND_PCM_F_MSG_POLLING
if (!(vss->features & (1U << VIRTIO_SND_PCM_F_MSG_POLLING)))
if (vss->features & (1U << VIRTIO_SND_PCM_F_MSG_POLLING))
cpu_to_le32(1U << VIRTIO_SND_PCM_F_MSG_POLLING);