fix model patcher

optimum/exporters/openvino/model_patcher.py

@@ -528,8 +528,8 @@ def __enter__(self):
 
         # llama/gemma has some accuracy issues with bf16 with transformers >= 4.39
         # fill causal mask in slightly different way for avoid overflow on some platforms
+        max_positions = self._model.config.max_position_embeddings
         if is_transformers_version(">=", "4.39.0"):
-            max_positions = self._model.config.max_position_embeddings
             self._model.model.register_buffer(
                 "bias",
                 torch.tril(torch.ones((max_positions, max_positions), dtype=torch.bool)).view(
@@ -552,9 +552,10 @@ def create_sinusoidal_positions(num_pos: int, dim: int, base: int = 10000) -> to
             return torch.cat((torch.sin(emb), torch.cos(emb)), dim=1)
 
         base = self._model.model.layers[0].self_attn.rotary_emb.base
+        dim = self._model.model.layers[0].self_attn.rotary_emb.dim
         self._model.model.register_buffer(
             "embed_positions",
-            create_sinusoidal_positions(max_positions, self._model.config.head_dim, self._model.config, base),
+            create_sinusoidal_positions(max_positions, dim, base),
         )
 
         # init cos/sin for torchscript tracing