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vhost: fix missing virtqueue status check in async path

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Vring should not be touched if vq is disabled. This patch adds the vq
status check in async enqueue polling to avoid accessing to a disabled
queue.

Fixes: cd6760da10 ("vhost: introduce async enqueue for split ring")

Signed-off-by: Patrick Fu <patrick.fu@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
This commit is contained in:
Patrick Fu 2020-07-21 11:35:57 +08:00 committed by Ferruh Yigit
parent 6a82bceb56
commit 5c7ddd6b14
1 changed files with 5 additions and 3 deletions
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8
lib/librte_vhost/virtio_net.c
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@ -1689,9 +1689,11 @@ uint16_t rte_vhost_poll_enqueue_completed(int vid, uint16_t queue_id,
if (n_pkts_put) {
vq->async_pkts_inflight_n -= n_pkts_put;
__atomic_add_fetch(&vq->used->idx, n_descs, __ATOMIC_RELEASE);
vhost_vring_call_split(dev, vq);
if (likely(vq->enabled && vq->access_ok)) {
__atomic_add_fetch(&vq->used->idx,
n_descs, __ATOMIC_RELEASE);
vhost_vring_call_split(dev, vq);
}
}
if (start_idx + n_pkts_put <= vq_size) {