From 5ba3040245fc0398160767aff59a3029ee139201 Mon Sep 17 00:00:00 2001
From: Yuang Liu <liuyuang@baidu.com>
Date: Fri, 21 Apr 2023 09:41:45 +0800
Subject: [PATCH] fix fused bias grad add nan (#53129)

---
 .../kernels/fusion/gpu/fused_linear_param_grad_add_kernel.cu    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/paddle/phi/kernels/fusion/gpu/fused_linear_param_grad_add_kernel.cu b/paddle/phi/kernels/fusion/gpu/fused_linear_param_grad_add_kernel.cu
index f39cc8acdc3..0840b6927a4 100644
--- a/paddle/phi/kernels/fusion/gpu/fused_linear_param_grad_add_kernel.cu
+++ b/paddle/phi/kernels/fusion/gpu/fused_linear_param_grad_add_kernel.cu
@@ -44,7 +44,7 @@ void FusedLinearParamGradAddImpl(const Context &ctx,
                                  DenseTensor *dbias_out) {
   constexpr bool kIsMultiPrecision = !std::is_same<T, MT>::value;
 
-  const bool fuse_bias_grad = kIsMultiPrecision && dweight_out;
+  const bool fuse_bias_grad = false;  // kIsMultiPrecision && dweight_out;
   if (dweight_out) {
     phi::funcs::ComputeFusedGemmEpilogueBackward<T, T, MT>(
         ctx,
-- 
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