diff --git a/include/ck/tensor_operation/gpu/device/device_convnd_backward_weight_xdl_c_shuffle_nhwc_kyxc_nhwk.hpp b/include/ck/tensor_operation/gpu/device/device_convnd_backward_weight_xdl_c_shuffle_nhwc_kyxc_nhwk.hpp
index 5920232038..4bb82baabc 100644
--- a/include/ck/tensor_operation/gpu/device/device_convnd_backward_weight_xdl_c_shuffle_nhwc_kyxc_nhwk.hpp
+++ b/include/ck/tensor_operation/gpu/device/device_convnd_backward_weight_xdl_c_shuffle_nhwc_kyxc_nhwk.hpp
@@ -900,9 +900,6 @@ struct DeviceConvndBwdWeightXdl_C_Shuffle_Input_N_Hi_Wi_C_Weight_K_Y_X_C_Output_
             b_grid_desc_kbatch_k0_n_k1_ = descs[I1];
             c_grid_desc_m_n_            = descs[I2];
 
-            // init work space
-            p_c_workspace_grid_ = nullptr;
-
             block_2_ctile_map_ =
                 GridwiseGemm::MakeCBlockClusterAdaptor(c_grid_desc_m_n_, M01, N01, k_batch_);
 
@@ -939,9 +936,6 @@ struct DeviceConvndBwdWeightXdl_C_Shuffle_Input_N_Hi_Wi_C_Weight_K_Y_X_C_Output_
         std::vector<index_t> input_left_pads_;
         std::vector<index_t> input_right_pads_;
         index_t k_batch_;
-
-        // external work space
-        void* p_c_workspace_grid_;
     };
 
     // Invoker
@@ -1017,7 +1011,7 @@ struct DeviceConvndBwdWeightXdl_C_Shuffle_Input_N_Hi_Wi_C_Weight_K_Y_X_C_Output_
             // run kernel for bf16 with splitk
             const auto run_bf16_splitk = [&](const auto& kernel) {
                 hipGetErrorString(hipMemset(
-                    arg.p_c_workspace_grid_,
+                    arg.p_workspace_,
                     0,
                     arg.c_grid_desc_mblock_mperblock_nblock_nperblock_.GetElementSpaceSize() *
                         sizeof(AccDataType)));
@@ -1030,7 +1024,7 @@ struct DeviceConvndBwdWeightXdl_C_Shuffle_Input_N_Hi_Wi_C_Weight_K_Y_X_C_Output_
                                            0,
                                            arg.p_a_grid_,
                                            arg.p_b_grid_,
-                                           static_cast<AccDataType*>(arg.p_c_workspace_grid_),
+                                           static_cast<AccDataType*>(arg.p_workspace_),
                                            arg.a_grid_desc_kbatch_k0_m_k1_,
                                            arg.b_grid_desc_kbatch_k0_n_k1_,
                                            arg.c_grid_desc_mblock_mperblock_nblock_nperblock_,
@@ -1072,7 +1066,7 @@ struct DeviceConvndBwdWeightXdl_C_Shuffle_Input_N_Hi_Wi_C_Weight_K_Y_X_C_Output_
                                            dim3(type_convert_grid_size),
                                            dim3(256),
                                            0,
-                                           static_cast<AccDataType*>(arg.p_c_workspace_grid_),
+                                           static_cast<AccDataType*>(arg.p_workspace_),
                                            p_c_grid_tmp_bf16_,
                                            a_grid_desc_m0_,
                                            b_grid_desc_m0_,
@@ -1448,11 +1442,6 @@ struct DeviceConvndBwdWeightXdl_C_Shuffle_Input_N_Hi_Wi_C_Weight_K_Y_X_C_Output_
     {
         return GetWorkSpaceSize<NumDimSpatial>(*dynamic_cast<const Argument*>(p_arg));
     }
-
-    void SetWorkSpacePointer(BaseArgument* p_arg, void* workspace_ptr) const override
-    {
-        dynamic_cast<Argument*>(p_arg)->p_c_workspace_grid_ = workspace_ptr;
-    }
 };
 
 } // namespace device