fix SEGA pipeline (#8467)

* fix

* style

---------
Co-authored-by: yiyixuxu <yixu310@gmail,com>
Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>

src/diffusers/pipelines/semantic_stable_diffusion/pipeline_semantic_stable_diffusion.py

@@ -376,6 +376,7 @@ class SemanticStableDiffusionPipeline(DiffusionPipeline, StableDiffusionMixin):
 
         # 2. Define call parameters
         batch_size = 1 if isinstance(prompt, str) else len(prompt)
+        device = self._execution_device
 
         if editing_prompt:
             enable_edit_guidance = True
@@ -405,7 +406,7 @@ class SemanticStableDiffusionPipeline(DiffusionPipeline, StableDiffusionMixin):
                 f" {self.tokenizer.model_max_length} tokens: {removed_text}"
             )
             text_input_ids = text_input_ids[:, : self.tokenizer.model_max_length]
-        text_embeddings = self.text_encoder(text_input_ids.to(self.device))[0]
+        text_embeddings = self.text_encoder(text_input_ids.to(device))[0]
 
         # duplicate text embeddings for each generation per prompt, using mps friendly method
         bs_embed, seq_len, _ = text_embeddings.shape
@@ -433,9 +434,9 @@ class SemanticStableDiffusionPipeline(DiffusionPipeline, StableDiffusionMixin):
                         f" {self.tokenizer.model_max_length} tokens: {removed_text}"
                     )
                     edit_concepts_input_ids = edit_concepts_input_ids[:, : self.tokenizer.model_max_length]
-                edit_concepts = self.text_encoder(edit_concepts_input_ids.to(self.device))[0]
+                edit_concepts = self.text_encoder(edit_concepts_input_ids.to(device))[0]
             else:
-                edit_concepts = editing_prompt_embeddings.to(self.device).repeat(batch_size, 1, 1)
+                edit_concepts = editing_prompt_embeddings.to(device).repeat(batch_size, 1, 1)
 
             # duplicate text embeddings for each generation per prompt, using mps friendly method
             bs_embed_edit, seq_len_edit, _ = edit_concepts.shape
@@ -476,7 +477,7 @@ class SemanticStableDiffusionPipeline(DiffusionPipeline, StableDiffusionMixin):
                 truncation=True,
                 return_tensors="pt",
             )
-            uncond_embeddings = self.text_encoder(uncond_input.input_ids.to(self.device))[0]
+            uncond_embeddings = self.text_encoder(uncond_input.input_ids.to(device))[0]
 
             # duplicate unconditional embeddings for each generation per prompt, using mps friendly method
             seq_len = uncond_embeddings.shape[1]
@@ -493,7 +494,7 @@ class SemanticStableDiffusionPipeline(DiffusionPipeline, StableDiffusionMixin):
         # get the initial random noise unless the user supplied it
 
         # 4. Prepare timesteps
-        self.scheduler.set_timesteps(num_inference_steps, device=self.device)
+        self.scheduler.set_timesteps(num_inference_steps, device=device)
         timesteps = self.scheduler.timesteps
 
         # 5. Prepare latent variables
@@ -504,7 +505,7 @@ class SemanticStableDiffusionPipeline(DiffusionPipeline, StableDiffusionMixin):
             height,
             width,
             text_embeddings.dtype,
-            self.device,
+            device,
             generator,
             latents,
         )
@@ -562,12 +563,12 @@ class SemanticStableDiffusionPipeline(DiffusionPipeline, StableDiffusionMixin):
                 if enable_edit_guidance:
                     concept_weights = torch.zeros(
                         (len(noise_pred_edit_concepts), noise_guidance.shape[0]),
-                        device=self.device,
+                        device=device,
                         dtype=noise_guidance.dtype,
                     )
                     noise_guidance_edit = torch.zeros(
                         (len(noise_pred_edit_concepts), *noise_guidance.shape),
-                        device=self.device,
+                        device=device,
                         dtype=noise_guidance.dtype,
                     )
                     # noise_guidance_edit = torch.zeros_like(noise_guidance)
@@ -644,21 +645,19 @@ class SemanticStableDiffusionPipeline(DiffusionPipeline, StableDiffusionMixin):
 
                         # noise_guidance_edit = noise_guidance_edit + noise_guidance_edit_tmp
 
-                    warmup_inds = torch.tensor(warmup_inds).to(self.device)
+                    warmup_inds = torch.tensor(warmup_inds).to(device)
                     if len(noise_pred_edit_concepts) > warmup_inds.shape[0] > 0:
                         concept_weights = concept_weights.to("cpu")  # Offload to cpu
                         noise_guidance_edit = noise_guidance_edit.to("cpu")
 
-                        concept_weights_tmp = torch.index_select(concept_weights.to(self.device), 0, warmup_inds)
+                        concept_weights_tmp = torch.index_select(concept_weights.to(device), 0, warmup_inds)
                         concept_weights_tmp = torch.where(
                             concept_weights_tmp < 0, torch.zeros_like(concept_weights_tmp), concept_weights_tmp
                         )
                         concept_weights_tmp = concept_weights_tmp / concept_weights_tmp.sum(dim=0)
                         # concept_weights_tmp = torch.nan_to_num(concept_weights_tmp)
 
-                        noise_guidance_edit_tmp = torch.index_select(
-                            noise_guidance_edit.to(self.device), 0, warmup_inds
-                        )
+                        noise_guidance_edit_tmp = torch.index_select(noise_guidance_edit.to(device), 0, warmup_inds)
                         noise_guidance_edit_tmp = torch.einsum(
                             "cb,cbijk->bijk", concept_weights_tmp, noise_guidance_edit_tmp
                         )
@@ -669,8 +668,8 @@ class SemanticStableDiffusionPipeline(DiffusionPipeline, StableDiffusionMixin):
 
                         del noise_guidance_edit_tmp
                         del concept_weights_tmp
-                        concept_weights = concept_weights.to(self.device)
-                        noise_guidance_edit = noise_guidance_edit.to(self.device)
+                        concept_weights = concept_weights.to(device)
+                        noise_guidance_edit = noise_guidance_edit.to(device)
 
                     concept_weights = torch.where(
                         concept_weights < 0, torch.zeros_like(concept_weights), concept_weights
@@ -679,6 +678,7 @@ class SemanticStableDiffusionPipeline(DiffusionPipeline, StableDiffusionMixin):
                     concept_weights = torch.nan_to_num(concept_weights)
 
                     noise_guidance_edit = torch.einsum("cb,cbijk->bijk", concept_weights, noise_guidance_edit)
+                    noise_guidance_edit = noise_guidance_edit.to(edit_momentum.device)
 
                     noise_guidance_edit = noise_guidance_edit + edit_momentum_scale * edit_momentum
 
@@ -689,7 +689,7 @@ class SemanticStableDiffusionPipeline(DiffusionPipeline, StableDiffusionMixin):
                         self.sem_guidance[i] = noise_guidance_edit.detach().cpu()
 
                 if sem_guidance is not None:
-                    edit_guidance = sem_guidance[i].to(self.device)
+                    edit_guidance = sem_guidance[i].to(device)
                     noise_guidance = noise_guidance + edit_guidance
 
                 noise_pred = noise_pred_uncond + noise_guidance
@@ -705,7 +705,7 @@ class SemanticStableDiffusionPipeline(DiffusionPipeline, StableDiffusionMixin):
         # 8. Post-processing
         if not output_type == "latent":
             image = self.vae.decode(latents / self.vae.config.scaling_factor, return_dict=False)[0]
-            image, has_nsfw_concept = self.run_safety_checker(image, self.device, text_embeddings.dtype)
+            image, has_nsfw_concept = self.run_safety_checker(image, device, text_embeddings.dtype)
         else:
             image = latents
             has_nsfw_concept = None