Fix Pytorch 1.8 Compilation issue (#404)

* fix pt1.8 issues

* fix pt1.8 issues

.github/workflows/build.yml

@@ -38,7 +38,7 @@ jobs:
     strategy:
       matrix:
         python-version: [3.6, 3.7]
-        torch: [1.5.0+cu101, 1.6.0+cu101, 1.7.0+cu101]
+        torch: [1.5.0+cu101, 1.6.0+cu101, 1.7.0+cu101, 1.8.0+cu101]
         include:
           - torch: 1.5.0+cu101
             torchvision: 0.6.0+cu101
@@ -52,6 +52,10 @@ jobs:
             mmcv: 1.7.0+cu101
             torchvision: 0.8.1+cu101
             cuda_arch: "7.0"
+          - torch: 1.8.0+cu101
+            mmcv: 1.8.0+cu101
+            torchvision: 0.9.0+cu101
+            cuda_arch: "7.0"
 
     steps:
       - uses: actions/checkout@v2

mmdet3d/ops/voxel/src/scatter_points_cuda.cu

@@ -269,7 +269,7 @@ std::vector<at::Tensor> dynamic_point_to_voxel_forward_gpu(
   AT_CUDA_CHECK(cudaGetLastError());
 
   coors_map_sorted = coors_map_sorted.cumsum(0, torch::kInt32);
-  coors_map.index_put_(coors_id_argsort, coors_map_sorted);
+  coors_map.index_put_({coors_id_argsort}, coors_map_sorted);
 
   const int num_coors_cpu =
       coors_map_sorted[-1].cpu().data_ptr<int32_t>()[0] + 1;