Merge branch 'main' into apply-lora-scale-decorator

* uniform run times and wheels for pytorch cuda.

* 12.9

* change to 24.04.

* change to 24.04.

docker/diffusers-pytorch-cuda/Dockerfile

@@ -1,4 +1,4 @@
-FROM nvidia/cuda:12.9.0-runtime-ubuntu20.04
+FROM nvidia/cuda:12.9.1-runtime-ubuntu24.04
 LABEL maintainer="Hugging Face"
 LABEL repository="diffusers"
 
@@ -36,7 +36,8 @@ ENV PATH="$VIRTUAL_ENV/bin:$PATH"
 RUN uv pip install --no-cache-dir \
     torch \
     torchvision \
-    torchaudio
+    torchaudio \
+    --index-url https://download.pytorch.org/whl/cu129
 
 # Install compatible versions of numba/llvmlite for Python 3.10+
 RUN uv pip install --no-cache-dir \

docker/diffusers-pytorch-xformers-cuda/Dockerfile

@@ -1,4 +1,4 @@
-FROM nvidia/cuda:12.9.0-runtime-ubuntu20.04
+FROM nvidia/cuda:12.9.1-runtime-ubuntu24.04
 LABEL maintainer="Hugging Face"
 LABEL repository="diffusers"
 
@@ -36,7 +36,8 @@ ENV PATH="$VIRTUAL_ENV/bin:$PATH"
 RUN uv pip install --no-cache-dir \
     torch \
     torchvision \
-    torchaudio
+    torchaudio \
+    --index-url https://download.pytorch.org/whl/cu129
 
 # Install compatible versions of numba/llvmlite for Python 3.10+
 RUN uv pip install --no-cache-dir \

src/diffusers/models/controlnets/controlnet.py

@@ -21,7 +21,7 @@ from torch.nn import functional as F
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import PeftAdapterMixin
 from ...loaders.single_file_model import FromOriginalModelMixin
-from ...utils import BaseOutput, logging
+from ...utils import BaseOutput, apply_lora_scale, logging
 from ..attention import AttentionMixin
 from ..attention_processor import (
     ADDED_KV_ATTENTION_PROCESSORS,
@@ -598,6 +598,7 @@ class ControlNetModel(ModelMixin, AttentionMixin, ConfigMixin, FromOriginalModel
         for module in self.children():
             fn_recursive_set_attention_slice(module, reversed_slice_size)
 
+    @apply_lora_scale("cross_attention_kwargs")
     def forward(
         self,
         sample: torch.Tensor,

src/diffusers/models/controlnets/controlnet_flux.py

@@ -20,7 +20,11 @@ import torch.nn as nn
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, BaseOutput, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import (
+    BaseOutput,
+    apply_lora_scale,
+    logging,
+)
 from ..attention import AttentionMixin
 from ..controlnets.controlnet import ControlNetConditioningEmbedding, zero_module
 from ..embeddings import CombinedTimestepGuidanceTextProjEmbeddings, CombinedTimestepTextProjEmbeddings, FluxPosEmbed
@@ -150,6 +154,7 @@ class FluxControlNetModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAdapterMi
 
         return controlnet
 
+    @apply_lora_scale("joint_attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -197,20 +202,6 @@ class FluxControlNetModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAdapterMi
             If `return_dict` is True, an [`~models.transformer_2d.Transformer2DModelOutput`] is returned, otherwise a
             `tuple` where the first element is the sample tensor.
         """
-        if joint_attention_kwargs is not None:
-            joint_attention_kwargs = joint_attention_kwargs.copy()
-            lora_scale = joint_attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if joint_attention_kwargs is not None and joint_attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `joint_attention_kwargs` when not using the PEFT backend is ineffective."
-                )
         hidden_states = self.x_embedder(hidden_states)
 
         if self.input_hint_block is not None:
@@ -323,10 +314,6 @@ class FluxControlNetModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAdapterMi
             None if len(controlnet_single_block_samples) == 0 else controlnet_single_block_samples
         )
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (controlnet_block_samples, controlnet_single_block_samples)
 

src/diffusers/models/controlnets/controlnet_qwenimage.py

@@ -20,7 +20,12 @@ import torch.nn as nn
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, BaseOutput, deprecate, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import (
+    BaseOutput,
+    apply_lora_scale,
+    deprecate,
+    logging,
+)
 from ..attention import AttentionMixin
 from ..cache_utils import CacheMixin
 from ..controlnets.controlnet import zero_module
@@ -123,6 +128,7 @@ class QwenImageControlNetModel(
 
         return controlnet
 
+    @apply_lora_scale("joint_attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -181,20 +187,6 @@ class QwenImageControlNetModel(
                 standard_warn=False,
             )
 
-        if joint_attention_kwargs is not None:
-            joint_attention_kwargs = joint_attention_kwargs.copy()
-            lora_scale = joint_attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if joint_attention_kwargs is not None and joint_attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `joint_attention_kwargs` when not using the PEFT backend is ineffective."
-                )
         hidden_states = self.img_in(hidden_states)
 
         # add
@@ -256,10 +248,6 @@ class QwenImageControlNetModel(
         controlnet_block_samples = [sample * conditioning_scale for sample in controlnet_block_samples]
         controlnet_block_samples = None if len(controlnet_block_samples) == 0 else controlnet_block_samples
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return controlnet_block_samples
 

src/diffusers/models/controlnets/controlnet_sana.py

@@ -20,7 +20,7 @@ from torch import nn
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, BaseOutput, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import BaseOutput, apply_lora_scale, logging
 from ..attention import AttentionMixin
 from ..embeddings import PatchEmbed, PixArtAlphaTextProjection
 from ..modeling_outputs import Transformer2DModelOutput
@@ -117,6 +117,7 @@ class SanaControlNetModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAdapterMi
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -129,21 +130,6 @@ class SanaControlNetModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAdapterMi
         attention_kwargs: Optional[Dict[str, Any]] = None,
         return_dict: bool = True,
     ) -> Union[Tuple[torch.Tensor, ...], Transformer2DModelOutput]:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         # ensure attention_mask is a bias, and give it a singleton query_tokens dimension.
         #   we may have done this conversion already, e.g. if we came here via UNet2DConditionModel#forward.
         #   we can tell by counting dims; if ndim == 2: it's a mask rather than a bias.
@@ -218,10 +204,6 @@ class SanaControlNetModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAdapterMi
             block_res_sample = controlnet_block(block_res_sample)
             controlnet_block_res_samples = controlnet_block_res_samples + (block_res_sample,)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         controlnet_block_res_samples = [sample * conditioning_scale for sample in controlnet_block_res_samples]
 
         if not return_dict:

src/diffusers/models/controlnets/controlnet_sd3.py

@@ -21,7 +21,7 @@ import torch.nn as nn
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ..attention import AttentionMixin, JointTransformerBlock
 from ..attention_processor import Attention, FusedJointAttnProcessor2_0
 from ..embeddings import CombinedTimestepTextProjEmbeddings, PatchEmbed
@@ -269,6 +269,7 @@ class SD3ControlNetModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAdapterMix
 
         return controlnet
 
+    @apply_lora_scale("joint_attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -308,21 +309,6 @@ class SD3ControlNetModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAdapterMix
             If `return_dict` is True, an [`~models.transformer_2d.Transformer2DModelOutput`] is returned, otherwise a
             `tuple` where the first element is the sample tensor.
         """
-        if joint_attention_kwargs is not None:
-            joint_attention_kwargs = joint_attention_kwargs.copy()
-            lora_scale = joint_attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if joint_attention_kwargs is not None and joint_attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `joint_attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         if self.pos_embed is not None and hidden_states.ndim != 4:
             raise ValueError("hidden_states must be 4D when pos_embed is used")
 
@@ -382,10 +368,6 @@ class SD3ControlNetModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAdapterMix
         # 6. scaling
         controlnet_block_res_samples = [sample * conditioning_scale for sample in controlnet_block_res_samples]
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (controlnet_block_res_samples,)
 

src/diffusers/models/transformers/auraflow_transformer_2d.py

@@ -21,7 +21,7 @@ import torch.nn.functional as F
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ...utils.torch_utils import maybe_allow_in_graph
 from ..attention import AttentionMixin
 from ..attention_processor import (
@@ -397,6 +397,7 @@ class AuraFlowTransformer2DModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAd
         if self.original_attn_processors is not None:
             self.set_attn_processor(self.original_attn_processors)
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.FloatTensor,
@@ -405,21 +406,6 @@ class AuraFlowTransformer2DModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAd
         attention_kwargs: Optional[Dict[str, Any]] = None,
         return_dict: bool = True,
     ) -> Union[Tuple[torch.Tensor], Transformer2DModelOutput]:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         height, width = hidden_states.shape[-2:]
 
         # Apply patch embedding, timestep embedding, and project the caption embeddings.
@@ -486,10 +472,6 @@ class AuraFlowTransformer2DModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAd
             shape=(hidden_states.shape[0], out_channels, height * patch_size, width * patch_size)
         )
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
 

src/diffusers/models/transformers/cogvideox_transformer_3d.py

@@ -20,7 +20,7 @@ from torch import nn
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ...utils.torch_utils import maybe_allow_in_graph
 from ..attention import Attention, AttentionMixin, FeedForward
 from ..attention_processor import CogVideoXAttnProcessor2_0, FusedCogVideoXAttnProcessor2_0
@@ -363,6 +363,7 @@ class CogVideoXTransformer3DModel(ModelMixin, AttentionMixin, ConfigMixin, PeftA
         if self.original_attn_processors is not None:
             self.set_attn_processor(self.original_attn_processors)
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -374,21 +375,6 @@ class CogVideoXTransformer3DModel(ModelMixin, AttentionMixin, ConfigMixin, PeftA
         attention_kwargs: Optional[Dict[str, Any]] = None,
         return_dict: bool = True,
     ) -> Union[Tuple[torch.Tensor], Transformer2DModelOutput]:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         batch_size, num_frames, channels, height, width = hidden_states.shape
 
         # 1. Time embedding
@@ -454,10 +440,6 @@ class CogVideoXTransformer3DModel(ModelMixin, AttentionMixin, ConfigMixin, PeftA
             )
             output = output.permute(0, 1, 5, 4, 2, 6, 3, 7).flatten(6, 7).flatten(4, 5).flatten(1, 2)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
         return Transformer2DModelOutput(sample=output)

src/diffusers/models/transformers/consisid_transformer_3d.py

@@ -20,7 +20,7 @@ from torch import nn
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ...utils.torch_utils import maybe_allow_in_graph
 from ..attention import Attention, AttentionMixin, FeedForward
 from ..attention_processor import CogVideoXAttnProcessor2_0
@@ -620,6 +620,7 @@ class ConsisIDTransformer3DModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAd
             ]
         )
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -632,21 +633,6 @@ class ConsisIDTransformer3DModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAd
         id_vit_hidden: Optional[torch.Tensor] = None,
         return_dict: bool = True,
     ) -> Union[Tuple[torch.Tensor], Transformer2DModelOutput]:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         # fuse clip and insightface
         valid_face_emb = None
         if self.is_train_face:
@@ -720,10 +706,6 @@ class ConsisIDTransformer3DModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAd
         output = hidden_states.reshape(batch_size, num_frames, height // p, width // p, -1, p, p)
         output = output.permute(0, 1, 4, 2, 5, 3, 6).flatten(5, 6).flatten(3, 4)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
         return Transformer2DModelOutput(sample=output)

src/diffusers/models/transformers/sana_transformer.py

@@ -20,7 +20,7 @@ from torch import nn
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ..attention import AttentionMixin
 from ..attention_processor import (
     Attention,
@@ -414,6 +414,7 @@ class SanaTransformer2DModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAdapte
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -426,21 +427,6 @@ class SanaTransformer2DModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAdapte
         controlnet_block_samples: Optional[Tuple[torch.Tensor]] = None,
         return_dict: bool = True,
     ) -> Union[Tuple[torch.Tensor, ...], Transformer2DModelOutput]:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         # ensure attention_mask is a bias, and give it a singleton query_tokens dimension.
         #   we may have done this conversion already, e.g. if we came here via UNet2DConditionModel#forward.
         #   we can tell by counting dims; if ndim == 2: it's a mask rather than a bias.
@@ -527,10 +513,6 @@ class SanaTransformer2DModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAdapte
         hidden_states = hidden_states.permute(0, 5, 1, 3, 2, 4)
         output = hidden_states.reshape(batch_size, -1, post_patch_height * p, post_patch_width * p)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
 

src/diffusers/models/transformers/transformer_bria.py

@@ -8,7 +8,7 @@ import torch.nn.functional as F
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ...utils.torch_utils import maybe_allow_in_graph
 from ..attention import AttentionModuleMixin, FeedForward
 from ..attention_dispatch import dispatch_attention_fn
@@ -581,6 +581,7 @@ class BriaTransformer2DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, FromOrig
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -621,20 +622,6 @@ class BriaTransformer2DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, FromOrig
             If `return_dict` is True, an [`~models.transformer_2d.Transformer2DModelOutput`] is returned, otherwise a
             `tuple` where the first element is the sample tensor.
         """
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
         hidden_states = self.x_embedder(hidden_states)
 
         timestep = timestep.to(hidden_states.dtype)
@@ -715,10 +702,6 @@ class BriaTransformer2DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, FromOrig
         hidden_states = self.norm_out(hidden_states, temb)
         output = self.proj_out(hidden_states)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
 

src/diffusers/models/transformers/transformer_bria_fibo.py

@@ -22,10 +22,8 @@ from ...models.modeling_outputs import Transformer2DModelOutput
 from ...models.modeling_utils import ModelMixin
 from ...models.transformers.transformer_bria import BriaAttnProcessor
 from ...utils import (
-    USE_PEFT_BACKEND,
+    apply_lora_scale,
     logging,
-    scale_lora_layers,
-    unscale_lora_layers,
 )
 from ...utils.torch_utils import maybe_allow_in_graph
 from ..attention import AttentionModuleMixin, FeedForward
@@ -510,6 +508,7 @@ class BriaFiboTransformer2DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, From
         ]
         self.caption_projection = nn.ModuleList(caption_projection)
 
+    @apply_lora_scale("joint_attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -545,20 +544,7 @@ class BriaFiboTransformer2DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, From
             If `return_dict` is True, an [`~models.transformer_2d.Transformer2DModelOutput`] is returned, otherwise a
             `tuple` where the first element is the sample tensor.
         """
-        if joint_attention_kwargs is not None:
-            joint_attention_kwargs = joint_attention_kwargs.copy()
-            lora_scale = joint_attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
 
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if joint_attention_kwargs is not None and joint_attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `joint_attention_kwargs` when not using the PEFT backend is ineffective."
-                )
         hidden_states = self.x_embedder(hidden_states)
 
         timestep = timestep.to(hidden_states.dtype)
@@ -645,10 +631,6 @@ class BriaFiboTransformer2DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, From
         hidden_states = self.norm_out(hidden_states, temb)
         output = self.proj_out(hidden_states)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
 

src/diffusers/models/transformers/transformer_chroma.py

@@ -21,7 +21,7 @@ import torch.nn as nn
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FluxTransformer2DLoadersMixin, FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, deprecate, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, deprecate, logging
 from ...utils.import_utils import is_torch_npu_available
 from ...utils.torch_utils import maybe_allow_in_graph
 from ..attention import AttentionMixin, FeedForward
@@ -473,6 +473,7 @@ class ChromaTransformer2DModel(
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("joint_attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -511,20 +512,6 @@ class ChromaTransformer2DModel(
             If `return_dict` is True, an [`~models.transformer_2d.Transformer2DModelOutput`] is returned, otherwise a
             `tuple` where the first element is the sample tensor.
         """
-        if joint_attention_kwargs is not None:
-            joint_attention_kwargs = joint_attention_kwargs.copy()
-            lora_scale = joint_attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if joint_attention_kwargs is not None and joint_attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `joint_attention_kwargs` when not using the PEFT backend is ineffective."
-                )
 
         hidden_states = self.x_embedder(hidden_states)
 
@@ -631,10 +618,6 @@ class ChromaTransformer2DModel(
         hidden_states = self.norm_out(hidden_states, temb)
         output = self.proj_out(hidden_states)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
 

src/diffusers/models/transformers/transformer_chronoedit.py

@@ -21,7 +21,7 @@ import torch.nn.functional as F
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, deprecate, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, deprecate, logging
 from ...utils.torch_utils import maybe_allow_in_graph
 from .._modeling_parallel import ContextParallelInput, ContextParallelOutput
 from ..attention import AttentionMixin, AttentionModuleMixin, FeedForward
@@ -638,6 +638,7 @@ class ChronoEditTransformer3DModel(
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -647,21 +648,6 @@ class ChronoEditTransformer3DModel(
         return_dict: bool = True,
         attention_kwargs: Optional[Dict[str, Any]] = None,
     ) -> Union[torch.Tensor, Dict[str, torch.Tensor]]:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         batch_size, num_channels, num_frames, height, width = hidden_states.shape
         p_t, p_h, p_w = self.config.patch_size
         post_patch_num_frames = num_frames // p_t
@@ -729,10 +715,6 @@ class ChronoEditTransformer3DModel(
         hidden_states = hidden_states.permute(0, 7, 1, 4, 2, 5, 3, 6)
         output = hidden_states.flatten(6, 7).flatten(4, 5).flatten(2, 3)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
 

src/diffusers/models/transformers/transformer_cogview4.py

@@ -20,7 +20,7 @@ import torch.nn.functional as F
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ...utils.torch_utils import maybe_allow_in_graph
 from ..attention import FeedForward
 from ..attention_processor import Attention
@@ -703,6 +703,7 @@ class CogView4Transformer2DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, Cach
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -718,21 +719,6 @@ class CogView4Transformer2DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, Cach
             Union[Tuple[torch.Tensor, torch.Tensor], List[Tuple[torch.Tensor, torch.Tensor]]]
         ] = None,
     ) -> Union[Tuple[torch.Tensor], Transformer2DModelOutput]:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         batch_size, num_channels, height, width = hidden_states.shape
 
         # 1. RoPE
@@ -779,10 +765,6 @@ class CogView4Transformer2DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, Cach
         hidden_states = hidden_states.reshape(batch_size, post_patch_height, post_patch_width, -1, p, p)
         output = hidden_states.permute(0, 3, 1, 4, 2, 5).flatten(4, 5).flatten(2, 3)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
         return Transformer2DModelOutput(sample=output)

src/diffusers/models/transformers/transformer_flux.py

@@ -22,7 +22,7 @@ import torch.nn.functional as F
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FluxTransformer2DLoadersMixin, FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ...utils.torch_utils import maybe_allow_in_graph
 from .._modeling_parallel import ContextParallelInput, ContextParallelOutput
 from ..attention import AttentionMixin, AttentionModuleMixin, FeedForward
@@ -634,6 +634,7 @@ class FluxTransformer2DModel(
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("joint_attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -675,20 +676,6 @@ class FluxTransformer2DModel(
             If `return_dict` is True, an [`~models.transformer_2d.Transformer2DModelOutput`] is returned, otherwise a
             `tuple` where the first element is the sample tensor.
         """
-        if joint_attention_kwargs is not None:
-            joint_attention_kwargs = joint_attention_kwargs.copy()
-            lora_scale = joint_attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if joint_attention_kwargs is not None and joint_attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `joint_attention_kwargs` when not using the PEFT backend is ineffective."
-                )
 
         hidden_states = self.x_embedder(hidden_states)
 
@@ -785,10 +772,6 @@ class FluxTransformer2DModel(
         hidden_states = self.norm_out(hidden_states, temb)
         output = self.proj_out(hidden_states)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
 

src/diffusers/models/transformers/transformer_flux2.py

@@ -21,7 +21,7 @@ import torch.nn.functional as F
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FluxTransformer2DLoadersMixin, FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from .._modeling_parallel import ContextParallelInput, ContextParallelOutput
 from ..attention import AttentionMixin, AttentionModuleMixin
 from ..attention_dispatch import dispatch_attention_fn
@@ -774,6 +774,7 @@ class Flux2Transformer2DModel(
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("joint_attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -810,20 +811,6 @@ class Flux2Transformer2DModel(
             `tuple` where the first element is the sample tensor.
         """
         # 0. Handle input arguments
-        if joint_attention_kwargs is not None:
-            joint_attention_kwargs = joint_attention_kwargs.copy()
-            lora_scale = joint_attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if joint_attention_kwargs is not None and joint_attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `joint_attention_kwargs` when not using the PEFT backend is ineffective."
-                )
 
         num_txt_tokens = encoder_hidden_states.shape[1]
 
@@ -908,10 +895,6 @@ class Flux2Transformer2DModel(
         hidden_states = self.norm_out(hidden_states, temb)
         output = self.proj_out(hidden_states)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
 

src/diffusers/models/transformers/transformer_hidream_image.py

@@ -8,7 +8,7 @@ from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin
 from ...models.modeling_outputs import Transformer2DModelOutput
 from ...models.modeling_utils import ModelMixin
-from ...utils import USE_PEFT_BACKEND, deprecate, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, deprecate, logging
 from ...utils.torch_utils import maybe_allow_in_graph
 from ..attention import Attention
 from ..embeddings import TimestepEmbedding, Timesteps
@@ -773,6 +773,7 @@ class HiDreamImageTransformer2DModel(ModelMixin, ConfigMixin, PeftAdapterMixin,
 
         return hidden_states, hidden_states_masks, img_sizes, img_ids
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -808,21 +809,6 @@ class HiDreamImageTransformer2DModel(ModelMixin, ConfigMixin, PeftAdapterMixin,
                 "if `hidden_states_masks` is passed, `hidden_states` must be a 3D tensors with shape (batch_size, patch_height * patch_width, patch_size * patch_size * channels)"
             )
 
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         # spatial forward
         batch_size = hidden_states.shape[0]
         hidden_states_type = hidden_states.dtype
@@ -933,10 +919,6 @@ class HiDreamImageTransformer2DModel(ModelMixin, ConfigMixin, PeftAdapterMixin,
         if hidden_states_masks is not None:
             hidden_states_masks = hidden_states_masks[:, :image_tokens_seq_len]
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
         return Transformer2DModelOutput(sample=output)

src/diffusers/models/transformers/transformer_hunyuan_video.py

@@ -22,7 +22,7 @@ from diffusers.loaders import FromOriginalModelMixin
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ..attention import AttentionMixin, FeedForward
 from ..attention_dispatch import dispatch_attention_fn
 from ..attention_processor import Attention
@@ -989,6 +989,7 @@ class HunyuanVideoTransformer3DModel(
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -1000,21 +1001,6 @@ class HunyuanVideoTransformer3DModel(
         attention_kwargs: Optional[Dict[str, Any]] = None,
         return_dict: bool = True,
     ) -> Union[Tuple[torch.Tensor], Transformer2DModelOutput]:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         batch_size, num_channels, num_frames, height, width = hidden_states.shape
         p, p_t = self.config.patch_size, self.config.patch_size_t
         post_patch_num_frames = num_frames // p_t
@@ -1104,10 +1090,6 @@ class HunyuanVideoTransformer3DModel(
         hidden_states = hidden_states.permute(0, 4, 1, 5, 2, 6, 3, 7)
         hidden_states = hidden_states.flatten(6, 7).flatten(4, 5).flatten(2, 3)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (hidden_states,)
 

src/diffusers/models/transformers/transformer_hunyuan_video15.py

@@ -22,7 +22,7 @@ from diffusers.loaders import FromOriginalModelMixin
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ..attention import AttentionMixin, FeedForward
 from ..attention_dispatch import dispatch_attention_fn
 from ..attention_processor import Attention
@@ -620,6 +620,7 @@ class HunyuanVideo15Transformer3DModel(
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -633,21 +634,6 @@ class HunyuanVideo15Transformer3DModel(
         attention_kwargs: Optional[Dict[str, Any]] = None,
         return_dict: bool = True,
     ) -> Union[Tuple[torch.Tensor], Transformer2DModelOutput]:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         batch_size, num_channels, num_frames, height, width = hidden_states.shape
         p_t, p_h, p_w = self.config.patch_size_t, self.config.patch_size, self.config.patch_size
         post_patch_num_frames = num_frames // p_t
@@ -783,10 +769,6 @@ class HunyuanVideo15Transformer3DModel(
         hidden_states = hidden_states.permute(0, 4, 1, 5, 2, 6, 3, 7)
         hidden_states = hidden_states.flatten(6, 7).flatten(4, 5).flatten(2, 3)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (hidden_states,)
 

src/diffusers/models/transformers/transformer_hunyuan_video_framepack.py

@@ -20,7 +20,7 @@ import torch.nn.functional as F
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, get_logger, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, get_logger
 from ..cache_utils import CacheMixin
 from ..embeddings import get_1d_rotary_pos_embed
 from ..modeling_outputs import Transformer2DModelOutput
@@ -198,6 +198,7 @@ class HunyuanVideoFramepackTransformer3DModel(
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -217,21 +218,6 @@ class HunyuanVideoFramepackTransformer3DModel(
         attention_kwargs: Optional[Dict[str, Any]] = None,
         return_dict: bool = True,
     ) -> Union[Tuple[torch.Tensor], Transformer2DModelOutput]:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         batch_size, num_channels, num_frames, height, width = hidden_states.shape
         p, p_t = self.config.patch_size, self.config.patch_size_t
         post_patch_num_frames = num_frames // p_t
@@ -337,10 +323,6 @@ class HunyuanVideoFramepackTransformer3DModel(
         hidden_states = hidden_states.permute(0, 4, 1, 5, 2, 6, 3, 7)
         hidden_states = hidden_states.flatten(6, 7).flatten(4, 5).flatten(2, 3)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (hidden_states,)
         return Transformer2DModelOutput(sample=hidden_states)

src/diffusers/models/transformers/transformer_hunyuanimage.py

@@ -23,7 +23,7 @@ from diffusers.loaders import FromOriginalModelMixin
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ...utils.torch_utils import maybe_allow_in_graph
 from ..attention import AttentionMixin, FeedForward
 from ..attention_dispatch import dispatch_attention_fn
@@ -742,6 +742,7 @@ class HunyuanImageTransformer2DModel(
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -755,21 +756,6 @@ class HunyuanImageTransformer2DModel(
         attention_kwargs: Optional[Dict[str, Any]] = None,
         return_dict: bool = True,
     ) -> Union[torch.Tensor, Dict[str, torch.Tensor]]:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         if hidden_states.ndim == 4:
             batch_size, channels, height, width = hidden_states.shape
             sizes = (height, width)
@@ -900,10 +886,6 @@ class HunyuanImageTransformer2DModel(
         ]
         hidden_states = hidden_states.reshape(*final_dims)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (hidden_states,)
 

src/diffusers/models/transformers/transformer_ltx.py

@@ -22,7 +22,7 @@ import torch.nn as nn
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, deprecate, is_torch_version, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, deprecate, is_torch_version, logging
 from ...utils.torch_utils import maybe_allow_in_graph
 from .._modeling_parallel import ContextParallelInput, ContextParallelOutput
 from ..attention import AttentionMixin, AttentionModuleMixin, FeedForward
@@ -491,6 +491,7 @@ class LTXVideoTransformer3DModel(
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -505,21 +506,6 @@ class LTXVideoTransformer3DModel(
         attention_kwargs: Optional[Dict[str, Any]] = None,
         return_dict: bool = True,
     ) -> torch.Tensor:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         image_rotary_emb = self.rope(hidden_states, num_frames, height, width, rope_interpolation_scale, video_coords)
 
         # convert encoder_attention_mask to a bias the same way we do for attention_mask
@@ -568,10 +554,6 @@ class LTXVideoTransformer3DModel(
         hidden_states = hidden_states * (1 + scale) + shift
         output = self.proj_out(hidden_states)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
         return Transformer2DModelOutput(sample=output)

src/diffusers/models/transformers/transformer_ltx2.py

@@ -22,14 +22,7 @@ import torch.nn as nn
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import (
-    USE_PEFT_BACKEND,
-    BaseOutput,
-    is_torch_version,
-    logging,
-    scale_lora_layers,
-    unscale_lora_layers,
-)
+from ...utils import BaseOutput, apply_lora_scale, is_torch_version, logging
 from .._modeling_parallel import ContextParallelInput, ContextParallelOutput
 from ..attention import AttentionMixin, AttentionModuleMixin, FeedForward
 from ..attention_dispatch import dispatch_attention_fn
@@ -1101,6 +1094,7 @@ class LTX2VideoTransformer3DModel(
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -1171,21 +1165,6 @@ class LTX2VideoTransformer3DModel(
                 `tuple` is returned where the first element is the denoised video latent patch sequence and the second
                 element is the denoised audio latent patch sequence.
         """
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         # Determine timestep for audio.
         audio_timestep = audio_timestep if audio_timestep is not None else timestep
 
@@ -1341,10 +1320,6 @@ class LTX2VideoTransformer3DModel(
         audio_hidden_states = audio_hidden_states * (1 + audio_scale) + audio_shift
         audio_output = self.audio_proj_out(audio_hidden_states)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output, audio_output)
         return AudioVisualModelOutput(sample=output, audio_sample=audio_output)

src/diffusers/models/transformers/transformer_lumina2.py

@@ -22,7 +22,7 @@ import torch.nn.functional as F
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import PeftAdapterMixin
 from ...loaders.single_file_model import FromOriginalModelMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ..attention import LuminaFeedForward
 from ..attention_processor import Attention
 from ..embeddings import TimestepEmbedding, Timesteps, apply_rotary_emb, get_1d_rotary_pos_embed
@@ -455,6 +455,7 @@ class Lumina2Transformer2DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, FromO
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -464,21 +465,6 @@ class Lumina2Transformer2DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, FromO
         attention_kwargs: Optional[Dict[str, Any]] = None,
         return_dict: bool = True,
     ) -> Union[torch.Tensor, Transformer2DModelOutput]:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         # 1. Condition, positional & patch embedding
         batch_size, _, height, width = hidden_states.shape
 
@@ -539,10 +525,6 @@ class Lumina2Transformer2DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, FromO
             )
         output = torch.stack(output, dim=0)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
         return Transformer2DModelOutput(sample=output)

src/diffusers/models/transformers/transformer_mochi.py

@@ -21,7 +21,7 @@ import torch.nn as nn
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import PeftAdapterMixin
 from ...loaders.single_file_model import FromOriginalModelMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ...utils.torch_utils import maybe_allow_in_graph
 from ..attention import FeedForward
 from ..attention_processor import MochiAttention, MochiAttnProcessor2_0
@@ -404,6 +404,7 @@ class MochiTransformer3DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, FromOri
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -413,21 +414,6 @@ class MochiTransformer3DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, FromOri
         attention_kwargs: Optional[Dict[str, Any]] = None,
         return_dict: bool = True,
     ) -> torch.Tensor:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         batch_size, num_channels, num_frames, height, width = hidden_states.shape
         p = self.config.patch_size
 
@@ -479,10 +465,6 @@ class MochiTransformer3DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, FromOri
         hidden_states = hidden_states.permute(0, 6, 1, 2, 4, 3, 5)
         output = hidden_states.reshape(batch_size, -1, num_frames, height, width)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
         return Transformer2DModelOutput(sample=output)

src/diffusers/models/transformers/transformer_qwenimage.py

@@ -24,7 +24,7 @@ import torch.nn.functional as F
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, deprecate, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, deprecate, logging
 from ...utils.torch_utils import maybe_allow_in_graph
 from .._modeling_parallel import ContextParallelInput, ContextParallelOutput
 from ..attention import AttentionMixin, FeedForward
@@ -829,6 +829,7 @@ class QwenImageTransformer2DModel(
         self.gradient_checkpointing = False
         self.zero_cond_t = zero_cond_t
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -887,20 +888,6 @@ class QwenImageTransformer2DModel(
                 "The mask-based approach is more flexible and supports variable-length sequences.",
                 standard_warn=False,
             )
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `joint_attention_kwargs` when not using the PEFT backend is ineffective."
-                )
 
         hidden_states = self.img_in(hidden_states)
 
@@ -981,10 +968,6 @@ class QwenImageTransformer2DModel(
         hidden_states = self.norm_out(hidden_states, temb)
         output = self.proj_out(hidden_states)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
 

src/diffusers/models/transformers/transformer_sana_video.py

@@ -21,7 +21,7 @@ from torch import nn
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ..attention import AttentionMixin
 from ..attention_dispatch import dispatch_attention_fn
 from ..attention_processor import Attention
@@ -570,6 +570,7 @@ class SanaVideoTransformer3DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, Fro
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -582,21 +583,6 @@ class SanaVideoTransformer3DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, Fro
         controlnet_block_samples: Optional[Tuple[torch.Tensor]] = None,
         return_dict: bool = True,
     ) -> Union[Tuple[torch.Tensor, ...], Transformer2DModelOutput]:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         # ensure attention_mask is a bias, and give it a singleton query_tokens dimension.
         #   we may have done this conversion already, e.g. if we came here via UNet2DConditionModel#forward.
         #   we can tell by counting dims; if ndim == 2: it's a mask rather than a bias.
@@ -695,10 +681,6 @@ class SanaVideoTransformer3DModel(ModelMixin, ConfigMixin, PeftAdapterMixin, Fro
         hidden_states = hidden_states.permute(0, 7, 1, 4, 2, 5, 3, 6)
         output = hidden_states.flatten(6, 7).flatten(4, 5).flatten(2, 3)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
 

src/diffusers/models/transformers/transformer_sd3.py

@@ -18,7 +18,7 @@ import torch.nn as nn
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin, SD3Transformer2DLoadersMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ...utils.torch_utils import maybe_allow_in_graph
 from ..attention import AttentionMixin, FeedForward, JointTransformerBlock
 from ..attention_processor import (
@@ -245,6 +245,7 @@ class SD3Transformer2DModel(
         if self.original_attn_processors is not None:
             self.set_attn_processor(self.original_attn_processors)
 
+    @apply_lora_scale("joint_attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -284,20 +285,6 @@ class SD3Transformer2DModel(
             If `return_dict` is True, an [`~models.transformer_2d.Transformer2DModelOutput`] is returned, otherwise a
             `tuple` where the first element is the sample tensor.
         """
-        if joint_attention_kwargs is not None:
-            joint_attention_kwargs = joint_attention_kwargs.copy()
-            lora_scale = joint_attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if joint_attention_kwargs is not None and joint_attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `joint_attention_kwargs` when not using the PEFT backend is ineffective."
-                )
 
         height, width = hidden_states.shape[-2:]
 
@@ -352,10 +339,6 @@ class SD3Transformer2DModel(
             shape=(hidden_states.shape[0], self.out_channels, height * patch_size, width * patch_size)
         )
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
 

src/diffusers/models/transformers/transformer_skyreels_v2.py

@@ -21,7 +21,7 @@ import torch.nn.functional as F
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, deprecate, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, deprecate, logging
 from ...utils.torch_utils import maybe_allow_in_graph
 from ..attention import AttentionMixin, AttentionModuleMixin, FeedForward
 from ..attention_dispatch import dispatch_attention_fn
@@ -630,6 +630,7 @@ class SkyReelsV2Transformer3DModel(
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -641,21 +642,6 @@ class SkyReelsV2Transformer3DModel(
         return_dict: bool = True,
         attention_kwargs: Optional[Dict[str, Any]] = None,
     ) -> Union[torch.Tensor, Dict[str, torch.Tensor]]:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         batch_size, num_channels, num_frames, height, width = hidden_states.shape
         p_t, p_h, p_w = self.config.patch_size
         post_patch_num_frames = num_frames // p_t
@@ -771,10 +757,6 @@ class SkyReelsV2Transformer3DModel(
         hidden_states = hidden_states.permute(0, 7, 1, 4, 2, 5, 3, 6)
         output = hidden_states.flatten(6, 7).flatten(4, 5).flatten(2, 3)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
 

src/diffusers/models/transformers/transformer_wan.py

@@ -21,7 +21,7 @@ import torch.nn.functional as F
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, deprecate, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, deprecate, logging
 from ...utils.torch_utils import maybe_allow_in_graph
 from .._modeling_parallel import ContextParallelInput, ContextParallelOutput
 from ..attention import AttentionMixin, AttentionModuleMixin, FeedForward
@@ -622,6 +622,7 @@ class WanTransformer3DModel(
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -631,21 +632,6 @@ class WanTransformer3DModel(
         return_dict: bool = True,
         attention_kwargs: Optional[Dict[str, Any]] = None,
     ) -> Union[torch.Tensor, Dict[str, torch.Tensor]]:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         batch_size, num_channels, num_frames, height, width = hidden_states.shape
         p_t, p_h, p_w = self.config.patch_size
         post_patch_num_frames = num_frames // p_t
@@ -713,10 +699,6 @@ class WanTransformer3DModel(
         hidden_states = hidden_states.permute(0, 7, 1, 4, 2, 5, 3, 6)
         output = hidden_states.flatten(6, 7).flatten(4, 5).flatten(2, 3)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
 

src/diffusers/models/transformers/transformer_wan_animate.py

@@ -21,7 +21,7 @@ import torch.nn.functional as F
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ..attention import AttentionMixin, AttentionModuleMixin, FeedForward
 from ..attention_dispatch import dispatch_attention_fn
 from ..cache_utils import CacheMixin
@@ -1141,6 +1141,7 @@ class WanAnimateTransformer3DModel(
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -1179,21 +1180,6 @@ class WanAnimateTransformer3DModel(
                 Whether to return the output as a dict or tuple.
         """
 
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         # Check that shapes match up
         if pose_hidden_states is not None and pose_hidden_states.shape[2] + 1 != hidden_states.shape[2]:
             raise ValueError(
@@ -1294,10 +1280,6 @@ class WanAnimateTransformer3DModel(
         hidden_states = hidden_states.permute(0, 7, 1, 4, 2, 5, 3, 6)
         output = hidden_states.flatten(6, 7).flatten(4, 5).flatten(2, 3)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
 

src/diffusers/models/transformers/transformer_wan_vace.py

@@ -20,7 +20,7 @@ import torch.nn as nn
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin
-from ...utils import USE_PEFT_BACKEND, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import apply_lora_scale, logging
 from ..attention import AttentionMixin, FeedForward
 from ..cache_utils import CacheMixin
 from ..modeling_outputs import Transformer2DModelOutput
@@ -261,6 +261,7 @@ class WanVACETransformer3DModel(
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("attention_kwargs")
     def forward(
         self,
         hidden_states: torch.Tensor,
@@ -272,21 +273,6 @@ class WanVACETransformer3DModel(
         return_dict: bool = True,
         attention_kwargs: Optional[Dict[str, Any]] = None,
     ) -> Union[torch.Tensor, Dict[str, torch.Tensor]]:
-        if attention_kwargs is not None:
-            attention_kwargs = attention_kwargs.copy()
-            lora_scale = attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-        else:
-            if attention_kwargs is not None and attention_kwargs.get("scale", None) is not None:
-                logger.warning(
-                    "Passing `scale` via `attention_kwargs` when not using the PEFT backend is ineffective."
-                )
-
         batch_size, num_channels, num_frames, height, width = hidden_states.shape
         p_t, p_h, p_w = self.config.patch_size
         post_patch_num_frames = num_frames // p_t
@@ -379,10 +365,6 @@ class WanVACETransformer3DModel(
         hidden_states = hidden_states.permute(0, 7, 1, 4, 2, 5, 3, 6)
         output = hidden_states.flatten(6, 7).flatten(4, 5).flatten(2, 3)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (output,)
 

src/diffusers/models/unets/unet_2d_condition.py

@@ -20,7 +20,12 @@ import torch.nn as nn
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import PeftAdapterMixin, UNet2DConditionLoadersMixin
 from ...loaders.single_file_model import FromOriginalModelMixin
-from ...utils import USE_PEFT_BACKEND, BaseOutput, deprecate, logging, scale_lora_layers, unscale_lora_layers
+from ...utils import (
+    BaseOutput,
+    apply_lora_scale,
+    deprecate,
+    logging,
+)
 from ..activations import get_activation
 from ..attention import AttentionMixin
 from ..attention_processor import (
@@ -974,6 +979,7 @@ class UNet2DConditionModel(
             encoder_hidden_states = (encoder_hidden_states, image_embeds)
         return encoder_hidden_states
 
+    @apply_lora_scale("cross_attention_kwargs")
     def forward(
         self,
         sample: torch.Tensor,
@@ -1112,18 +1118,6 @@ class UNet2DConditionModel(
             cross_attention_kwargs["gligen"] = {"objs": self.position_net(**gligen_args)}
 
         # 3. down
-        # we're popping the `scale` instead of getting it because otherwise `scale` will be propagated
-        # to the internal blocks and will raise deprecation warnings. this will be confusing for our users.
-        if cross_attention_kwargs is not None:
-            cross_attention_kwargs = cross_attention_kwargs.copy()
-            lora_scale = cross_attention_kwargs.pop("scale", 1.0)
-        else:
-            lora_scale = 1.0
-
-        if USE_PEFT_BACKEND:
-            # weight the lora layers by setting `lora_scale` for each PEFT layer
-            scale_lora_layers(self, lora_scale)
-
         is_controlnet = mid_block_additional_residual is not None and down_block_additional_residuals is not None
         # using new arg down_intrablock_additional_residuals for T2I-Adapters, to distinguish from controlnets
         is_adapter = down_intrablock_additional_residuals is not None
@@ -1239,10 +1233,6 @@ class UNet2DConditionModel(
             sample = self.conv_act(sample)
         sample = self.conv_out(sample)
 
-        if USE_PEFT_BACKEND:
-            # remove `lora_scale` from each PEFT layer
-            unscale_lora_layers(self, lora_scale)
-
         if not return_dict:
             return (sample,)
 

src/diffusers/models/unets/unet_motion_model.py

@@ -21,7 +21,7 @@ import torch.nn.functional as F
 
 from ...configuration_utils import ConfigMixin, FrozenDict, register_to_config
 from ...loaders import FromOriginalModelMixin, PeftAdapterMixin, UNet2DConditionLoadersMixin
-from ...utils import BaseOutput, deprecate, logging
+from ...utils import BaseOutput, apply_lora_scale, deprecate, logging
 from ...utils.torch_utils import apply_freeu
 from ..attention import AttentionMixin, BasicTransformerBlock
 from ..attention_processor import (
@@ -1875,6 +1875,7 @@ class UNetMotionModel(ModelMixin, AttentionMixin, ConfigMixin, UNet2DConditionLo
         if self.original_attn_processors is not None:
             self.set_attn_processor(self.original_attn_processors)
 
+    @apply_lora_scale("cross_attention_kwargs")
     def forward(
         self,
         sample: torch.Tensor,

src/diffusers/models/unets/uvit_2d.py

@@ -21,6 +21,7 @@ from torch.utils.checkpoint import checkpoint
 
 from ...configuration_utils import ConfigMixin, register_to_config
 from ...loaders import PeftAdapterMixin
+from ...utils import apply_lora_scale
 from ..attention import AttentionMixin, BasicTransformerBlock, SkipFFTransformerBlock
 from ..attention_processor import (
     ADDED_KV_ATTENTION_PROCESSORS,
@@ -146,6 +147,7 @@ class UVit2DModel(ModelMixin, AttentionMixin, ConfigMixin, PeftAdapterMixin):
 
         self.gradient_checkpointing = False
 
+    @apply_lora_scale("cross_attention_kwargs")
     def forward(self, input_ids, encoder_hidden_states, pooled_text_emb, micro_conds, cross_attention_kwargs=None):
         encoder_hidden_states = self.encoder_proj(encoder_hidden_states)
         encoder_hidden_states = self.encoder_proj_layer_norm(encoder_hidden_states)

src/diffusers/utils/__init__.py

@@ -130,6 +130,7 @@ from .loading_utils import get_module_from_name, get_submodule_by_name, load_ima
 from .logging import get_logger
 from .outputs import BaseOutput
 from .peft_utils import (
+    apply_lora_scale,
     check_peft_version,
     delete_adapter_layers,
     get_adapter_name,

src/diffusers/utils/peft_utils.py

@@ -16,6 +16,7 @@ PEFT utilities: Utilities related to peft library
 """
 
 import collections
+import functools
 import importlib
 from typing import Optional
 
@@ -275,6 +276,59 @@ def set_weights_and_activate_adapters(model, adapter_names, weights):
                 module.set_scale(adapter_name, get_module_weight(weight, module_name))
 
 
+def apply_lora_scale(kwargs_name: str = "joint_attention_kwargs"):
+    """
+    Decorator to automatically handle LoRA layer scaling/unscaling in forward methods.
+
+    This decorator extracts the `lora_scale` from the specified kwargs parameter, applies scaling before the forward
+    pass, and ensures unscaling happens after, even if an exception occurs.
+
+    Args:
+        kwargs_name (`str`, defaults to `"joint_attention_kwargs"`):
+            The name of the keyword argument that contains the LoRA scale. Common values include
+            "joint_attention_kwargs", "attention_kwargs", "cross_attention_kwargs", etc.
+    """
+
+    def decorator(forward_fn):
+        @functools.wraps(forward_fn)
+        def wrapper(self, *args, **kwargs):
+            from . import USE_PEFT_BACKEND
+
+            lora_scale = 1.0
+            attention_kwargs = kwargs.get(kwargs_name)
+
+            if attention_kwargs is not None:
+                attention_kwargs = attention_kwargs.copy()
+                kwargs[kwargs_name] = attention_kwargs
+                lora_scale = attention_kwargs.pop("scale", 1.0)
+            else:
+                if (
+                    not USE_PEFT_BACKEND
+                    and attention_kwargs is not None
+                    and attention_kwargs.get("scale", None) is not None
+                ):
+                    logger.warning(
+                        f"Passing `scale` via `{kwargs_name}` when not using the PEFT backend is ineffective."
+                    )
+
+            # Apply LoRA scaling if using PEFT backend
+            if USE_PEFT_BACKEND:
+                scale_lora_layers(self, lora_scale)
+
+            try:
+                # Execute the forward pass
+                result = forward_fn(self, *args, **kwargs)
+                return result
+            finally:
+                # Always unscale, even if forward pass raises an exception
+                if USE_PEFT_BACKEND:
+                    unscale_lora_layers(self, lora_scale)
+
+        return wrapper
+
+    return decorator
+
+
 def check_peft_version(min_version: str) -> None:
     r"""
     Checks if the version of PEFT is compatible.