X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvcl%2Fvppcom.c;h=e70aa0017723cd84f244af062e15f65b007ea30e;hb=f7cda7a9bc399258959084154263c42c5a91e030;hp=b5953872f816fbabd9b6db75617cf472526e0d27;hpb=28aa539f7da7b172d0f35ea9a63f3986939477f7;p=vpp.git

diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c
index b5953872f81..e70aa001772 100644
--- a/src/vcl/vppcom.c
+++ b/src/vcl/vppcom.c
@@ -1530,6 +1530,14 @@ vppcom_session_read_internal (uint32_t session_handle, void *buf, int n,
   if (svm_fifo_is_empty_cons (rx_fifo))
     svm_fifo_unset_event (s->rx_fifo);
 
+  /* Cut-through sessions might request tx notifications on rx fifos */
+  if (PREDICT_FALSE (rx_fifo->want_tx_ntf))
+    {
+      app_send_io_evt_to_vpp (s->vpp_evt_q, s->rx_fifo->master_session_index,
+			      SESSION_IO_EVT_RX, SVM_Q_WAIT);
+      svm_fifo_reset_tx_ntf (s->rx_fifo);
+    }
+
   VDBG (2, "session %u[0x%llx]: read %d bytes from (%p)", s->session_index,
 	s->vpp_handle, n_read, rx_fifo);