From b52f445a52227b4da11b7ae5a3c294f697b00908 Mon Sep 17 00:00:00 2001
From: Niklas Eiling <niklas.eiling@eonerc.rwth-aachen.de>
Date: Wed, 14 Aug 2024 09:49:30 +0200
Subject: [PATCH] fpga: handle receving more data than size of configured
 signals

Signed-off-by: Niklas Eiling <niklas.eiling@eonerc.rwth-aachen.de>
---
 lib/nodes/fpga.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/nodes/fpga.cpp b/lib/nodes/fpga.cpp
index b22030bad..ac0cac59a 100644
--- a/lib/nodes/fpga.cpp
+++ b/lib/nodes/fpga.cpp
@@ -270,6 +270,12 @@ int FpgaNode::fastRead(Sample *smps[], unsigned cnt) {
 
   smp->length = 0;
   for (unsigned i = 0; i < MIN(read / sizeof(uint32_t), smp->capacity); i++) {
+    if (i >= in.signals->size()) {
+      logger->warn(
+          "Received more data than expected. Maybe the descriptor cache needs "
+          "to be invalidated?. Ignoring the rest of the data.");
+      break;
+    }
     if (in.signals->getByIndex(i)->type == SignalType::INTEGER) {
       smp->data[i].i = static_cast<int64_t>((*accessorRx)[i]);
     } else {