TPC Cluster Finder: Fix invalid write during deconvolution.

Author: fweig

GPU/GPUTracking/TPCClusterFinder/GPUTPCCFDeconvolution.cxx

@@ -50,7 +50,8 @@ GPUdii() void GPUTPCCFDeconvolution::deconvolutionImpl(int nBlocks, int nThreads
   ushort partId = ll;
 
   ushort in3x3 = 0;
-  partId = CfUtils::partition<SCRATCH_PAD_WORK_GROUP_SIZE>(smem, ll, iamPeak, SCRATCH_PAD_WORK_GROUP_SIZE, &in3x3);
+  bool exclude3x3 = iamPeak || !pos.valid();
+  partId = CfUtils::partition<SCRATCH_PAD_WORK_GROUP_SIZE>(smem, ll, exclude3x3, SCRATCH_PAD_WORK_GROUP_SIZE, &in3x3);
 
   if (partId < in3x3) {
     smem.posBcast1[partId] = pos;
@@ -74,7 +75,7 @@ GPUdii() void GPUTPCCFDeconvolution::deconvolutionImpl(int nBlocks, int nThreads
   }
 
   ushort in5x5 = 0;
-  partId = CfUtils::partition<SCRATCH_PAD_WORK_GROUP_SIZE>(smem, partId, peakCount > 0 && !iamPeak, in3x3, &in5x5);
+  partId = CfUtils::partition<SCRATCH_PAD_WORK_GROUP_SIZE>(smem, partId, peakCount > 0 && !exclude3x3, in3x3, &in5x5);
 
   if (partId < in5x5) {
     smem.posBcast1[partId] = pos;
@@ -99,7 +100,7 @@ GPUdii() void GPUTPCCFDeconvolution::deconvolutionImpl(int nBlocks, int nThreads
     peakCount *= -1;
   }
 
-  if (iamDummy) {
+  if (iamDummy || !pos.valid()) {
     return;
   }