vio: If enqueue fails, drop packet.

From brad@

diff --git a/sys/dev/pci/if_vio.c b/sys/dev/pci/if_vio.c
index 120b260..316e742 100644 (file)
--- a/sys/dev/pci/if_vio.c
+++ b/sys/dev/pci/if_vio.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: if_vio.c,v 1.27 2015/04/18 14:38:38 sf Exp $  */
+/*     $OpenBSD: if_vio.c,v 1.28 2015/04/24 12:53:35 sf Exp $  */
 
 /*
  * Copyright (c) 2012 Stefan Fritsch, Alexander Fiveg.
@@ -740,13 +740,11 @@ again:
                        panic("enqueue_prep for a tx buffer: %d", r);
                r = vio_encap(sc, slot, m);
                if (r != 0) {
-#if VIRTIO_DEBUG
-                       if (r != ENOBUFS)
-                               printf("%s: error %d\n", __func__, r);
-#endif
                        virtio_enqueue_abort(vq, slot);
-                       ifp->if_flags |= IFF_OACTIVE;
-                       break;
+                       IFQ_DEQUEUE(&ifp->if_snd, m);
+                       m_freem(m);
+                       ifp->if_oerrors++;
+                       continue;
                }
                r = virtio_enqueue_reserve(vq, slot,
                    sc->sc_tx_dmamaps[slot]->dm_nsegs + 1);