diff options
Diffstat (limited to 'xen/net/dev.c')
| -rw-r--r-- | xen/net/dev.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/xen/net/dev.c b/xen/net/dev.c index af23219796..ec80189b58 100644 --- a/xen/net/dev.c +++ b/xen/net/dev.c @@ -2111,6 +2111,7 @@ static void __make_tx_response(net_vif_t *vif, resp->status = st; pos = TX_RING_INC(pos); vif->tx_resp_prod = vif->shared_idxs->tx_resp_prod = pos; + smp_mb(); /* Update producer before checking event threshold. */ if ( pos == vif->shared_idxs->tx_event ) { unsigned long cpu_mask = mark_guest_event(vif->domain, _EVENT_NET); @@ -2139,6 +2140,7 @@ static void make_rx_response(net_vif_t *vif, resp->offset = off; pos = RX_RING_INC(pos); vif->rx_resp_prod = vif->shared_idxs->rx_resp_prod = pos; + smp_mb(); /* Update producer before checking event threshold. */ if ( pos == vif->shared_idxs->rx_event ) { unsigned long cpu_mask = mark_guest_event(vif->domain, _EVENT_NET); |