From 012d9e2d5cb5433ef0eaa59c99f387b597edd481 Mon Sep 17 00:00:00 2001
From: David Rohr <drohr@jwdt.org>
Date: Wed, 16 Jul 2025 17:46:38 +0200
Subject: [PATCH] GPU: Fix checking for dmaTransferType with GPU memory
 registration disabled

---
 GPU/GPUTracking/Global/GPUChainTracking.cxx | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/GPU/GPUTracking/Global/GPUChainTracking.cxx b/GPU/GPUTracking/Global/GPUChainTracking.cxx
index 423f0b782d095..9d2578731a30c 100644
--- a/GPU/GPUTracking/Global/GPUChainTracking.cxx
+++ b/GPU/GPUTracking/Global/GPUChainTracking.cxx
@@ -273,8 +273,8 @@ bool GPUChainTracking::ValidateSettings()
     GPUError("NStreams of %d insufficient for %d nTPCClustererLanes", mRec->NStreams(), (int32_t)GetProcessingSettings().nTPCClustererLanes);
     return false;
   }
-  if (GetProcessingSettings().noGPUMemoryRegistration && gatherMode != 3) {
-    GPUError("noGPUMemoryRegistration only possible with gather mode 3");
+  if ((mRec->GetRecoStepsGPU() & GPUDataTypes::RecoStep::TPCCompression) && GetProcessingSettings().noGPUMemoryRegistration && gatherMode != 3) {
+    GPUError("noGPUMemoryRegistration only possible with gather mode 3 (set to %d / %d)", mRec->GetProcessingSettings().tpcCompressionGatherMode, gatherMode);
     return false;
   }
   if (GetProcessingSettings().doublePipeline) {