fix gpu maxpoolgrad

mindspore/ccsrc/backend/kernel_compiler/gpu/nn/pooling_grad_gpu_kernel.h

@@ -178,22 +178,29 @@ class PoolingGradGpuKernel : public GpuKernel {
     auto window = GetAttr<std::vector<int>>(kernel_node, "ksize");
     int window_height = window[2];
     int window_width = window[3];
+    int stride_h = stride_[2];
+    int stride_w = stride_[3];
+    if (data_format_ == kOpFormat_NHWC) {
+      window_height = window[1];
+      window_width = window[2];
+      stride_h = stride_[1];
+      stride_w = stride_[2];
+    }
     int windowDimA[2] = {window_height, window_width};
     int paddingA[2] = {0, 0};
-    int strideA[2] = {stride_[2], stride_[3]};
+    int strideA[2] = {stride_h, stride_w};
     if (kSamePadModeUpperCase == pad_mode_ || kSamePadModeLowerCase == pad_mode_) {
       pad_height_ =
-        std::max<int>(0, (((old_height_ / stride_[2]) * stride_[2] == old_height_ ? (old_height_ / stride_[2])
-                                                                                  : (old_height_ / stride_[2]) + 1) -
+        std::max<int>(0, (((old_height_ / stride_h) * stride_h == old_height_ ? (old_height_ / stride_h)
+                                                                              : (old_height_ / stride_h) + 1) -
                           1) *
-                             stride_[2] +
+                             stride_h +
                            window_height - old_height_);
-      pad_width_ =
-        std::max<int>(0, (((old_width_ / stride_[3]) * stride_[3] == old_width_ ? (old_width_ / stride_[3])
-                                                                                : (old_width_ / stride_[3]) + 1) -
-                          1) *
-                             stride_[3] +
-                           window_width - old_width_);
+      pad_width_ = std::max<int>(
+        0, (((old_width_ / stride_w) * stride_w == old_width_ ? (old_width_ / stride_w) : (old_width_ / stride_w) + 1) -
+            1) *
+               stride_w +
+             window_width - old_width_);
       pad_top_ = pad_height_ / 2;
       pad_left_ = pad_width_ / 2;
       paddingA[0] = pad_top_;