diff options
Diffstat (limited to 'drivers/net/virtio')
| -rw-r--r-- | drivers/net/virtio/virtio_user/virtio_user_dev.c | 2 | ||||
| -rw-r--r-- | drivers/net/virtio/virtqueue.h | 5 |
2 files changed, 6 insertions, 1 deletions
diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c b/drivers/net/virtio/virtio_user/virtio_user_dev.c index 20816c93..9c8bcd2c 100644 --- a/drivers/net/virtio/virtio_user/virtio_user_dev.c +++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c @@ -624,7 +624,7 @@ virtio_user_handle_cq(struct virtio_user_dev *dev, uint16_t queue_idx) /* Update used ring */ uep = &vring->used->ring[avail_idx]; - uep->id = avail_idx; + uep->id = desc_idx; uep->len = n_descs; vring->used->idx++; 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); } |