fix bug: softmax precision, model random zero

mindspore/lite/src/runtime/kernel/opencl/subgraph_opencl_kernel.cc

@@ -129,7 +129,7 @@ int SubGraphOpenCLKernel::GenToFormatOp(const std::vector<lite::Tensor *> &in_te
       MS_LOG(ERROR) << "SubGraphOpenCLKernel create op failed!";
       delete new_tensor;
       new_tensor = nullptr;
-      delete parameter;
+      free(parameter);
       parameter = nullptr;
       return RET_ERROR;
     }

mindspore/lite/src/runtime/opencl/opencl_allocator.cc

@@ -111,8 +111,8 @@ void *OpenCLAllocator::Malloc(size_t size, const std::vector<size_t> &img_size)
     ocl_runtime_->UnmapBuffer(*mem, host_ptr);
     if (!img_size.empty()) {
       cl::ImageFormat image_format(CL_RGBA, img_size[2]);
-      image = new (std::nothrow) cl::Image2D(*ocl_runtime_->Context(), image_format, *buffer, img_size[0],
-                                                          img_size[1], img_pitch * dtype_size, &ret);
+      image = new (std::nothrow) cl::Image2D(*ocl_runtime_->Context(), image_format, *buffer, img_size[0], img_size[1],
+                                             img_pitch * dtype_size, &ret);
       if (image == nullptr || ret != CL_SUCCESS) {
         delete buffer;
         UnLock();
@@ -265,6 +265,9 @@ void OpenCLAllocator::Clear() {
   Lock();
   auto svm_capabilities = ocl_runtime_->GetSVMCapabilities();
   for (auto it = allocated_list_.begin(); it != allocated_list_.end(); it++) {
+    if (it->second->map_flags) {
+      UnmapBuffer(it->second->host_ptr_);
+    }
     if (svm_capabilities) {
       clSVMFree((*ocl_runtime_->Context())(), it->second->host_ptr_);
       MS_LOG(DEBUG) << "OpenCL free svm buffer : " << it->second->host_ptr_;

mindspore/lite/src/runtime/opencl/opencl_allocator.h

@@ -63,7 +63,7 @@ class OpenCLAllocator : public Allocator {
   int GetImageSize(void *host_ptr, std::vector<size_t> *img_size);
   void *Prepare(void *ptr) override {
     if (ptr != nullptr) {
-      ptr = MapBuffer(ptr, CL_MAP_WRITE, nullptr, true);
+      ptr = MapBuffer(ptr, CL_MAP_READ | CL_MAP_WRITE, nullptr, true);
     }
     return ptr;
   }

mindspore/lite/src/tensor.h

@@ -184,6 +184,7 @@ class Tensor : public mindspore::tensor::MSTensor {
         MS_LOG(WARNING) << "Malloc data failed";
       }
     }
+    Prepare();
     return this->data_;
   }