STM32U585: USB MSC : can't pass Compliance Test by using USB3CV

[testo-jeff]

Describe the bug

USB MSC test failed when using test tool USB3CV, below is the screenshot:

Per debug, Zephyr can receive command A8 and 9E from USB3CV, and Zephyr USB protocol layer has handled the command, but in low layer(probably ST driver? not sure) can't send out the response to USB3CV, lead to test failed(100% reproduced).

Regression

• This is a regression.

Steps to reproduce

Configurations:
CONFIG_USB_DEVICE_STACK_NEXT=y
CONFIG_USB_MASS_STORAGE=y
CONFIG_MAIN_STACK_SIZE=2048
CONFIG_USBD_PID=0x0045
CONFIG_USBD_VID=0x128d
CONFIG_USBD_PRODUCT="xxx Test kit"
CONFIG_USBD_MANUFACTURER="xxx CO.,LTD"
CONFIG_USBD_MSC_CLASS=y
CONFIG_USBD_MSC_LUNS_PER_INSTANCE=3
CONFIG_DISK_ACCESS=y
CONFIG_DISK_DRIVERS=y
CONFIG_FILE_SYSTEM=y
CONFIG_FAT_FILESYSTEM_ELM=y
CONFIG_UDC_STM32=y
CONFIG_USB_DC_STM32=n

Steps:

1. Install USB3CV on Windows 11
2. Choose USB device on USB3CV
3. Run Compliance Test
4. Test failed in 100%.

Relevant log output

Impact

Annoyance – Minor irritation; no significant impact on usability or functionality.

Environment

• OS: Windows 10/11
• USB3CV: v3.1.8.0
• Zephyr version: 4.1.99/35af7b88b369a1aaa469e214b20c7f3c50a79f52, zephyr-sdk-0.17.0

Additional Context

No response

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[JarmouniA]

Missing info in Environment: Zephyr version/SHA1, SDK

[testo-jeff]

@JarmouniA Updated, would you please check again? Thx.

[JarmouniA]

Is "USB MSC test" a in-tree Zephyr test?

[testo-jeff]

@JarmouniA Not in-tree Zephyr test, we use standard external test tool to do the test.
Here is the test tool:
https://www.usb.org/document-library/usb3cv