[diffusion] comfyui: fix import typo

[triple-mu]

Motivation

Fix import bug:

    from sglang.multimodal_gen.runtime.loader.fsdp_load import (
ImportError: cannot import name 'set_default_dtype' from 'sglang.multimodal_gen.runtime.loader.fsdp_load'

Modifications

Accuracy Tests

Benchmarking and Profiling

Checklist

• Format your code according to the Format code with pre-commit.
• Add unit tests according to the Run and add unit tests.
• Update documentation according to Write documentations.
• Provide accuracy and speed benchmark results according to Test the accuracy and Benchmark the speed.
• Follow the SGLang code style guidance.

Review Process

1. Ping Merge Oncalls to start the PR flow. See the PR Merge Process.
2. Get approvals from CODEOWNERS and other reviewers.
3. Trigger CI tests with comments or contact authorized users to do so.
   • /tag-run-ci-label, /rerun-failed-ci, /tag-and-rerun-ci
4. After green CI and required approvals, ask Merge Oncalls to merge.

[gemini-code-assist]

Summary of Changes

Hello @triple-mu, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request resolves an ImportError that occurred when attempting to import set_default_dtype within the comfyui_qwen_image_pipeline. The change involves correcting the module from which this utility function is imported and updating its name to set_default_torch_dtype in the relevant code. This ensures the proper initialization of default data types during model loading, thereby fixing a critical bug in the multimodal generation runtime.

Highlights

• Import Correction: Corrected an ImportError by updating the import path for a data type setting function.
• Function Relocation and Renaming: The function set_default_dtype was replaced with set_default_torch_dtype and is now correctly imported from sglang.multimodal_gen.runtime.loader.utils instead of sglang.multimodal_gen.runtime.loader.fsdp_load.

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[gemini-code-assist]

Code Review

This pull request effectively addresses the ImportError by correctly updating the import path and function name for set_default_dtype to set_default_torch_dtype. The changes are consistent across the import statement and its usage, ensuring the code now correctly references the refactored utility function. This is a clean and necessary fix for the reported bug.

[mickqian]

@niehen6174 could you take a look?

[BBuf]

/tag-and-rerun-ci

[niehen6174]

@niehen6174 could you take a look?

It seems that the imported set_default_dtype function has been modified. I will add some tests for comfyuipipeline later.