From b5cd0e530c6a7729bf6e6b21458e746ff5b98a2b Mon Sep 17 00:00:00 2001
From: Niklas Eiling <niklas.eiling@eonerc.rwth-aachen.de>
Date: Wed, 5 Jun 2024 17:35:47 +0200
Subject: [PATCH] fpga: do not return poll FDs if we are not using FDs

Signed-off-by: Niklas Eiling <niklas.eiling@eonerc.rwth-aachen.de>
---
 lib/nodes/fpga.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/nodes/fpga.cpp b/lib/nodes/fpga.cpp
index f4acd4ec6..ec5d90952 100644
--- a/lib/nodes/fpga.cpp
+++ b/lib/nodes/fpga.cpp
@@ -341,6 +341,11 @@ int FpgaNode::slowWrite(Sample *smps[], unsigned cnt) {
 }
 
 std::vector<int> FpgaNode::getPollFDs() {
+  if (!lowLatencyMode && card && !card->polling) {
+    return card->vfioDevice->getEventfdList();
+  } else {
+    return {};
+  }
   return card->vfioDevice->getEventfdList();
 }