Revert "Try to reverse the dtype checking mechanism"

This reverts commit d243e24f.

modules/devices.py

@@ -4,7 +4,6 @@ from functools import lru_cache
 
 import torch
 from modules import errors, shared
-from modules import torch_utils
 
 if sys.platform == "darwin":
     from modules import mac_specific
@@ -141,7 +140,11 @@ def manual_cast_forward(target_dtype):
             args = [arg.to(target_dtype) if isinstance(arg, torch.Tensor) else arg for arg in args]
             kwargs = {k: v.to(target_dtype) if isinstance(v, torch.Tensor) else v for k, v in kwargs.items()}
 
-        org_dtype = torch_utils.get_param(self).dtype
+        org_dtype = target_dtype
+        for param in self.parameters():
+            if param.dtype != target_dtype:
+                org_dtype = param.dtype
+                break
 
         if org_dtype != target_dtype:
             self.to(target_dtype)