diff options
Diffstat (limited to 'drivers/net/virtio/virtqueue.h')
| -rw-r--r-- | drivers/net/virtio/virtqueue.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h index 26518ed9..2e2abf15 100644 --- a/drivers/net/virtio/virtqueue.h +++ b/drivers/net/virtio/virtqueue.h @@ -336,6 +336,11 @@ vq_update_avail_ring(struct virtqueue *vq, uint16_t desc_idx) static inline int virtqueue_kick_prepare(struct virtqueue *vq) { + /* + * Ensure updated avail->idx is visible to vhost before reading + * the used->flags. + */ + virtio_mb(); return !(vq->vq_ring.used->flags & VRING_USED_F_NO_NOTIFY); } |