USBD_UnRegisterClassComposite always fails

[x-moe-x]

The function USBD_UnRegisterClassComposite(...) in Middlewares/ST/STM32_USB_Device_Library/Core/Src/usbd_core.c always fails.

Initially, ret is set to USBD_FAIL ...

STM32CubeWB/Middlewares/ST/STM32_USB_Device_Library/Core/Src/usbd_core.c

Lines 297 to 304 in cbe89b3

	USBD_StatusTypeDef USBD_UnRegisterClassComposite(USBD_HandleTypeDef *pdev)
	{
	USBD_StatusTypeDef ret = USBD_FAIL;
	uint8_t idx1;
	uint8_t idx2;
	/* Unroll all activated classes */
	for (idx1 = 0; idx1 < pdev->NumClasses; idx1++)

... and on failure it is set again to USBD_FAIL

STM32CubeWB/Middlewares/ST/STM32_USB_Device_Library/Core/Src/usbd_core.c

Lines 316 to 324 in cbe89b3

	if (pdev->pClass[pdev->classId]->DeInit(pdev, (uint8_t)pdev->dev_config) != 0U)
	{
	#if (USBD_DEBUG_LEVEL > 1U)
	USBD_ErrLog("Class DeInit didn't succeed!, can't unregister selected class");
	#endif /* (USBD_DEBUG_LEVEL > 1U) */
	ret = USBD_FAIL;
	}
	}

so on finish it fails all the time.

STM32CubeWB/Middlewares/ST/STM32_USB_Device_Library/Core/Src/usbd_core.c

Lines 352 to 360 in cbe89b3

	/* Reset the configuration descriptor */
	(void)USBD_CMPST_ClearConfDesc(pdev);
	/* Reset the class ID and number of classes */
	pdev->classId = 0U;
	pdev->NumClasses = 0U;
	return ret;
	}

[ALABSTM]

Hi @x-moe-x,

Looks like you're right. Your report will be forwarded to our development teams. Thank you for the heads-up.

With regards,

[ALABSTM]

ST Internal Reference: 192427

[ALABSTM]

Hi @x-moe-x,

For your information, our development teams confirmed the issue. A fix will be available in a future release. We cannot share a date for the moment. I will keep you informed.

With regards,