[qwen2-vl] fix vision attention scaling (#39043)

scale lost its `-` when refactoring

Author: zucchini-nlp

src/transformers/models/qwen2_5_omni/modeling_qwen2_5_omni.py

@@ -925,7 +925,7 @@ def __init__(self, config: Qwen2_5OmniVisionEncoderConfig = None) -> None:
         self.k = nn.Linear(self.dim, self.dim, bias=True)
         self.v = nn.Linear(self.dim, self.dim, bias=True)
         self.proj = nn.Linear(self.dim, self.dim)
-        self.scaling = math.sqrt(self.head_dim)
+        self.scaling = self.head_dim**-0.5
         self.num_key_value_groups = 1  # needed for eager attention
         self.config = config
 

src/transformers/models/qwen2_5_omni/modular_qwen2_5_omni.py

@@ -1903,7 +1903,7 @@ def __init__(self, config: Qwen2_5OmniVisionEncoderConfig = None) -> None:
         self.k = nn.Linear(self.dim, self.dim, bias=True)
         self.v = nn.Linear(self.dim, self.dim, bias=True)
         self.proj = nn.Linear(self.dim, self.dim)
-        self.scaling = math.sqrt(self.head_dim)
+        self.scaling = self.head_dim**-0.5
         self.num_key_value_groups = 1  # needed for eager attention
         self.config = config
 

src/transformers/models/qwen2_5_vl/modeling_qwen2_5_vl.py

@@ -24,7 +24,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import math
 from dataclasses import dataclass
 from typing import Any, Callable, Optional, Union
 
@@ -205,7 +204,7 @@ def __init__(self, config: Qwen2_5_VLVisionConfig) -> None:
         self.num_key_value_groups = 1  # needed for eager attention
         self.qkv = nn.Linear(self.dim, self.dim * 3, bias=True)
         self.proj = nn.Linear(self.dim, self.dim)
-        self.scaling = math.sqrt(self.head_dim)
+        self.scaling = self.head_dim**-0.5
         self.config = config
 
     def forward(

src/transformers/models/qwen2_vl/modeling_qwen2_vl.py

@@ -19,7 +19,6 @@
 # limitations under the License.
 """PyTorch Qwen2-VL model."""
 
-import math
 from dataclasses import dataclass
 from typing import Any, Callable, Optional, Union
 
@@ -323,7 +322,7 @@ def __init__(self, config: Qwen2VLVisionConfig) -> None:
         self.num_key_value_groups = 1  # needed for eager attention
         self.qkv = nn.Linear(self.dim, self.dim * 3, bias=True)
         self.proj = nn.Linear(self.dim, self.dim)
-        self.scaling = math.sqrt(self.head_dim)
+        self.scaling = self.head_dim**-0.5
         self.config = config
 
     def forward(