update common.py

vllm/v1/attention/backends/mla/common.py

@@ -860,7 +860,7 @@ class MLACommonMetadataBuilder(AttentionMetadataBuilder[M]):
                 prefill_metadata.cudnn_workspace = self.cudnn_workspace
 
         # TODO @ wangming
-        # decode_metadata = None
+        decode_metadata = None
         # if num_decodes > 0:
             # if self.use_spec_decode and not common_attn_metadata.spec_layer_decoding:
             #     query_lens = self.num_scheduled_tokens_np[:num_decodes]