From 4f7d71b64ef2a208e49afa8d4aa6a65bd0ef247a Mon Sep 17 00:00:00 2001
From: David Rohr <drohr@jwdt.org>
Date: Sun, 24 Nov 2024 18:08:34 +0100
Subject: [PATCH] GPU: fix bug when filling subthreshold clusters

---
 GPU/GPUTracking/Merger/GPUTPCGMTrackParam.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/GPU/GPUTracking/Merger/GPUTPCGMTrackParam.cxx b/GPU/GPUTracking/Merger/GPUTPCGMTrackParam.cxx
index 0b1c282f3b2f0..d817278404534 100644
--- a/GPU/GPUTracking/Merger/GPUTPCGMTrackParam.cxx
+++ b/GPU/GPUTracking/Merger/GPUTPCGMTrackParam.cxx
@@ -223,7 +223,7 @@ GPUd() bool GPUTPCGMTrackParam::Fit(GPUTPCGMMerger* GPUrestrict() merger, int32_
         bool dodEdx = param.par.dodEdx && param.dodEdxDownscaled && param.rec.tpc.adddEdxSubThresholdClusters && iWay == nWays - 1 && CAMath::Abs(cluster.row - lastRow) == 2 && cluster.leg == clusters[maxN - 1].leg;
         dodEdx = AttachClustersPropagate(merger, cluster.slice, lastRow, cluster.row, iTrk, cluster.leg == clusters[maxN - 1].leg, prop, inFlyDirection, GPUCA_MAX_SIN_PHI, dodEdx);
         if (dodEdx) {
-          dEdx.fillSubThreshold(lastRow - 1, param);
+          dEdx.fillSubThreshold(lastRow - wayDirection, param);
         }
       }