Fix issue in Kokkos neighor binning when using non-Kokkos lists on GPUs

src/KOKKOS/nbin_kokkos.cpp

@@ -40,6 +40,7 @@ NBinKokkos<DeviceType>::NBinKokkos(LAMMPS *lmp) : NBinStandard(lmp) {
 #endif
   h_resize() = 1;
 
+  kokkos = 1;
 }
 
 /* ----------------------------------------------------------------------

src/KOKKOS/neighbor_kokkos.cpp

@@ -301,6 +301,7 @@ void NeighborKokkos::build_kokkos(int topoflag)
 
   if (style != Neighbor::NSQ) {
     for (int i = 0; i < nbin; i++) {
+      if (!neigh_bin[i]->kokkos) atomKK->sync(Host,ALL_MASK);
       neigh_bin[i]->bin_atoms_setup(nall);
       neigh_bin[i]->bin_atoms();
     }

src/nbin.cpp

@@ -35,6 +35,8 @@ NBin::NBin(LAMMPS *lmp) : Pointers(lmp)
 
   dimension = domain->dimension;
   triclinic = domain->triclinic;
+
+  kokkos = 0;
 }
 
 /* ---------------------------------------------------------------------- */

src/nbin.h

@@ -47,6 +47,10 @@ class NBin : protected Pointers {
   virtual void setup_bins(int) = 0;
   virtual void bin_atoms() = 0;
 
+  // Kokkos package
+
+  int kokkos;                       // 1 if class stores Kokkos data
+
  protected:
 
   // data from Neighbor class