[bugfix] Fix rope theta config for MiniMax after transformers v5 update (#21241)

python/sglang/srt/models/minimax_m2.py

@@ -73,6 +73,7 @@ from sglang.srt.utils import (
     is_non_idle_and_non_empty,
     make_layers,
 )
+from sglang.srt.utils.hf_transformers_utils import get_rope_config
 
 logger = logging.getLogger(__name__)
 
@@ -570,7 +571,7 @@ class MiniMaxM2Attention(nn.Module):
 
         # RoPE settings - support partial RoPE
         # FIXME: minimax_m2 config use external config that not compatible with transformers v5
-        self.rope_theta = config.rope_theta
+        self.rope_theta, self.rope_scaling = get_rope_config(config)
         self.max_position_embeddings = getattr(config, "max_position_embeddings", 8192)
         self.rotary_dim = getattr(
             config, "rotary_dim", self.head_dim
@@ -600,13 +601,12 @@ class MiniMaxM2Attention(nn.Module):
         )
 
         # Setup RoPE with partial rotary dimension
-        rope_scaling = getattr(config, "rope_scaling", None)
         self.rotary_emb = get_rope(
             self.head_dim,
             rotary_dim=self.rotary_dim,  # Use partial rotary dimension
             max_position=self.max_position_embeddings,
             base=self.rope_theta,
-            rope_scaling=rope_scaling,
+            rope_scaling=self.rope_scaling,
         )
 
         # QK Normalization layers