From 311ccee70f5206360f5f3ed6ae870f991e608bc4 Mon Sep 17 00:00:00 2001
From: Martin Braun <martin.braun@ettus.com>
Date: Wed, 16 Mar 2016 11:51:49 -0700
Subject: transport: Also send flow control ACKs on sequence errors

---
 host/lib/transport/super_recv_packet_handler.hpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/host/lib/transport/super_recv_packet_handler.hpp b/host/lib/transport/super_recv_packet_handler.hpp
index 8742d1d16..8bfa1973a 100644
--- a/host/lib/transport/super_recv_packet_handler.hpp
+++ b/host/lib/transport/super_recv_packet_handler.hpp
@@ -421,6 +421,12 @@ private:
         const size_t expected_packet_count = _props[index].packet_count;
         _props[index].packet_count = (info.ifpi.packet_count + 1) & seq_mask;
         if (expected_packet_count != info.ifpi.packet_count){
+            if (_props[index].handle_flowctrl) {
+                // Always update flow control in this case, because we don't
+                // know which packet was dropped and what state the upstream
+                // flow control is in.
+                _props[index].handle_flowctrl(info.ifpi.packet_count);
+            }
             return PACKET_SEQUENCE_ERROR;
         }
         #endif
-- 
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