set device id of Place() to get GPUContext needed by LimitGridDim in ElemwiseGradBroadcast (#42320)

* set device id of Place() to get GPUContext needed by LimitGridDim in ElemwiseGradBroadcast

* fix code style

paddle/phi/kernels/funcs/elementwise_grad_base.h

@@ -15,6 +15,7 @@ limitations under the License. */
 #pragma once
 
 #include "paddle/phi/backends/all_context.h"
+#include "paddle/phi/backends/gpu/gpu_info.h"
 #include "paddle/phi/core/dense_tensor.h"
 #include "paddle/phi/kernels/funcs/common_shape.h"
 #include "paddle/phi/kernels/funcs/elementwise_utils.h"
@@ -978,7 +979,7 @@ static void ElemwiseGradBroadcast1CUDA(gpuStream_t stream,
     // suppose perfoemance improves with h increased.
     dim3 block_size = dim3(BLOCK_X, BLOCK_Y);
     dim3 grid_size = dim3((w + BLOCK_X - 1) / BLOCK_X);
-    auto gplace = phi::GPUPlace();
+    auto gplace = phi::GPUPlace(phi::backends::gpu::GetCurrentDeviceId());
     auto *ctx = static_cast<GPUContext *>(
         paddle::platform::DeviceContextPool::Instance().Get(gplace));
     paddle::platform::LimitGridDim(*ctx, &grid_size);
@@ -1003,7 +1004,7 @@ static void ElemwiseGradBroadcast2CUDA(gpuStream_t stream,
                                        T *dy) {
   int block_size = std::min(ELEMWISE_MAX_BLOCK_DIM, pre * post);
   dim3 grid_size = dim3(n);
-  auto gplace = phi::GPUPlace();
+  auto gplace = phi::GPUPlace(phi::backends::gpu::GetCurrentDeviceId());
   auto *ctx = static_cast<GPUContext *>(
       paddle::platform::DeviceContextPool::Instance().Get(gplace));
   paddle::platform::LimitGridDim(*ctx, &grid_size);