Fix Freenoise for AnimateDiff V3 checkpoint. (huggingface#9288)

update

Author: DN6

src/diffusers/pipelines/free_noise_utils.py

@@ -220,13 +220,22 @@ def enable_free_noise(
         self._free_noise_weighting_scheme = weighting_scheme
         self._free_noise_noise_type = noise_type
 
-        blocks = [*self.unet.down_blocks, self.unet.mid_block, *self.unet.up_blocks]
+        if hasattr(self.unet.mid_block, "motion_modules"):
+            blocks = [*self.unet.down_blocks, self.unet.mid_block, *self.unet.up_blocks]
+        else:
+            blocks = [*self.unet.down_blocks, *self.unet.up_blocks]
+
         for block in blocks:
             self._enable_free_noise_in_block(block)
 
     def disable_free_noise(self) -> None:
         self._free_noise_context_length = None
 
+        if hasattr(self.unet.mid_block, "motion_modules"):
+            blocks = [*self.unet.down_blocks, self.unet.mid_block, *self.unet.up_blocks]
+        else:
+            blocks = [*self.unet.down_blocks, *self.unet.up_blocks]
+
         blocks = [*self.unet.down_blocks, self.unet.mid_block, *self.unet.up_blocks]
         for block in blocks:
             self._disable_free_noise_in_block(block)