Fix qwen3 vl moe execution failure

Signed-off-by: Seunghyuk Park <separk@habana.ai>

Author: shepark

vllm_gaudi/models/qwen3_moe.py

@@ -8,23 +8,48 @@
 
 
 class HpuQwen3MoeSparseMoeBlock(UpstreamQwen3MoeSparseMoeBlock):
+    """
+    Override forward to handle 3D tensor input (B,S,H) -> (B*S,H)
+    and SharedFusedMoE tuple returns.
+    """
 
     def forward(self, hidden_states: torch.Tensor) -> torch.Tensor:
         orig_shape = hidden_states.shape
         hidden_dim = orig_shape[-1]
 
-        hs = hidden_states.reshape(-1, hidden_dim)  # (T, H)
+        hs = hidden_states.reshape(-1, hidden_dim)  # (B*S, H)
         num_tokens = hs.shape[0]
 
-        if getattr(self, "is_sequence_parallel", False):
+        is_seq_parallel = getattr(self, "is_sequence_parallel", False)
+
+        if is_seq_parallel:
             hs = sequence_parallel_chunk(hs)
 
         router_logits, _ = self.gate(hs)
-        out = self.experts(hidden_states=hs, router_logits=router_logits)
 
-        if getattr(self, "is_sequence_parallel", False):
+        # SharedFusedMoE returns (shared_out, fused_out)
+        experts_out = self.experts(hidden_states=hs, router_logits=router_logits)
+
+        if isinstance(experts_out, tuple):
+            if len(experts_out) != 2:
+                raise RuntimeError(f"unexpected experts() tuple length={len(experts_out)}; "
+                                   "expected (shared_out, fused_out).")
+            shared_out, fused_out = experts_out
+            if fused_out is None:
+                raise RuntimeError("experts() returned fused_out=None")
+            out = fused_out if shared_out is None else (shared_out + fused_out)
+        else:
+            # backward compatibility (FusedMoE)
+            out = experts_out
+
+        if is_seq_parallel:
             out = tensor_model_parallel_all_gather(out, 0)
             out = out[:num_tokens]
+        else:
+            # from upstream : TP>1 may require a reduction here.
+            tp_size = getattr(self, "tp_size", 1)
+            if tp_size > 1 and hasattr(self.experts, "maybe_all_reduce_tensor_model_parallel"):
+                out = self.experts.maybe_all_reduce_tensor_model_parallel(out)
 
         return out.reshape(*orig_shape[:-1], hidden_dim)
 
@@ -33,8 +58,9 @@ def upgrade_qwen3_moe_blocks_inplace(language_model: nn.Module) -> int:
     lm_model = getattr(language_model, "model", None)
     layers = getattr(lm_model, "layers", None)
     if layers is None:
-        return
+        return 0
 
+    upgraded = 0
     for layer in layers:
         mlp = getattr(layer, "mlp", None)
         if mlp is None:
@@ -46,3 +72,6 @@ def upgrade_qwen3_moe_blocks_inplace(language_model: nn.Module) -> int:
         if isinstance(mlp, UpstreamQwen3MoeSparseMoeBlock):
             mlp.__class__ = HpuQwen3MoeSparseMoeBlock
             mlp._hpu_accept_3d_installed = True
+            upgraded += 1
+
+    return upgraded

vllm_gaudi/models/qwen3_vl_moe.py

@@ -13,14 +13,12 @@ def __init__(self, *, vllm_config: VllmConfig, prefix: str = ""):
         super().__init__(vllm_config=vllm_config, prefix=prefix)
 
         quant_config = getattr(self, "quant_config", None)
-        multimodal_config = getattr(vllm_config.model_config, "multimodal_config", None)
 
         if hasattr(self, "visual") and self.visual is not None:
             self.visual = HPUQwen3_VisionTransformer(
                 self.config.vision_config,
                 norm_eps=getattr(self.config, "rms_norm_eps", 1e-6),
                 quant_config=quant_config,
-                multimodal_config=multimodal_config,
                 prefix=maybe_prefix(prefix, "visual"),
             )