Properly disable weight initialization in clip models.

comfy/clip_vision.py

@@ -2,10 +2,12 @@ from transformers import CLIPVisionModelWithProjection, CLIPVisionConfig, CLIPIm
 from .utils import load_torch_file, transformers_convert
 import os
 import torch
+import comfy.ops
 
 class ClipVisionModel():
     def __init__(self, json_config):
         config = CLIPVisionConfig.from_json_file(json_config)
+        with comfy.ops.use_comfy_ops():
             with modeling_utils.no_init_weights():
                 self.model = CLIPVisionModelWithProjection(config)
         self.processor = CLIPImageProcessor(crop_size=224,

comfy/ops.py

@@ -1,4 +1,5 @@
 import torch
+from contextlib import contextmanager
 
 class Linear(torch.nn.Module):
     def __init__(self, in_features: int, out_features: int, bias: bool = True,
@@ -19,3 +20,13 @@ class Linear(torch.nn.Module):
 class Conv2d(torch.nn.Conv2d):
     def reset_parameters(self):
         return None
+
+
+@contextmanager
+def use_comfy_ops(): # Kind of an ugly hack but I can't think of a better way
+    old_torch_nn_linear = torch.nn.Linear
+    torch.nn.Linear = Linear
+    try:
+        yield
+    finally:
+        torch.nn.Linear = old_torch_nn_linear

comfy/sd1_clip.py

@@ -1,6 +1,7 @@
 import os
 
 from transformers import CLIPTokenizer, CLIPTextModel, CLIPTextConfig, modeling_utils
+import comfy.ops
 import torch
 import traceback
 import zipfile
@@ -38,6 +39,7 @@ class SD1ClipModel(torch.nn.Module, ClipTokenWeightEncoder):
             if textmodel_json_config is None:
                 textmodel_json_config = os.path.join(os.path.dirname(os.path.realpath(__file__)), "sd1_clip_config.json")
             config = CLIPTextConfig.from_json_file(textmodel_json_config)
+            with comfy.ops.use_comfy_ops():
                 with modeling_utils.no_init_weights():
                     self.transformer = CLIPTextModel(config)