fix ds-inference without policy (#2247)

Co-authored-by: NJeff Rasley <jerasley@microsoft.com>

deepspeed/module_inject/replace_module.py

@@ -653,11 +653,10 @@ def replace_transformer_layer(orig_layer_impl,
                 new_bias = torch.empty((weight_shape[0]),
                                        device=child.weight.device,
                                        dtype=child.weight.dtype)
-
                 if z_inference:
                     with deepspeed.zero.GatheredParameters(child.bias, modifier_rank=0):
                         new_bias.data.copy_(child.bias.data)
-                else:
+                elif child.bias:
                     new_bias.data.copy_(child.bias.data)
                 return LinearAllreduce(data, child.bias if child.bias is None else \
                             torch.nn.parameter.Parameter(new_bias.to(torch.cuda.current_device())), mp_group)
@@ -704,7 +703,9 @@ def replace_transformer_layer(orig_layer_impl,
                                       child.weight.shape[1] // mp_size),
                                      device=child.weight.device,
                                      dtype=child.weight.dtype)
-            data = mp_replace.copy(new_weight, child.weight.ds_tensor.data)
+            data = mp_replace.copy(new_weight,
+                                   child.weight.ds_tensor.data if hasattr(child.weight, 'ds_tensor') else \
+                                   child.weight.data)
             new_embedding = nn.Embedding(child.weight.shape[0],
                                          child.weight.shape[1] // mp_size)
             new_embedding.weight.data.copy_(data)