[Fix] Fix tensor descriptor setting in MLU ball_query. (#2579)

mmcv/ops/csrc/pytorch/mlu/ball_query_mlu.cpp

@@ -14,11 +14,6 @@
 void ball_query_forward_mlu(int b, int n, int m, float min_radius,
                             float max_radius, int nsample, const Tensor new_xyz,
                             const Tensor xyz, Tensor idx) {
-  MluOpTensorDescriptor new_xyz_desc, xyz_desc, idx_desc;
-  new_xyz_desc.set(new_xyz);
-  xyz_desc.set(xyz);
-  idx_desc.set(idx);
-
   auto new_xyz_contiguous = torch_mlu::cnnl::ops::cnnl_contiguous(
       new_xyz, new_xyz.suggest_memory_format());
   auto xyz_contiguous = torch_mlu::cnnl::ops::cnnl_contiguous(
@@ -26,6 +21,11 @@ void ball_query_forward_mlu(int b, int n, int m, float min_radius,
   auto idx_contiguous = torch_mlu::cnnl::ops::cnnl_contiguous(
       idx, new_xyz.suggest_memory_format());
 
+  MluOpTensorDescriptor new_xyz_desc, xyz_desc, idx_desc;
+  new_xyz_desc.set(new_xyz_contiguous);
+  xyz_desc.set(xyz_contiguous);
+  idx_desc.set(idx_contiguous);
+
   auto new_xyz_impl = torch_mlu::getMluTensorImpl(new_xyz_contiguous);
   auto xyz_impl = torch_mlu::getMluTensorImpl(xyz_contiguous);
   auto idx_impl = torch_mlu::getMluTensorImpl(idx_contiguous);