USB MSC - use invalid return types in generated usbd_storage_if.c

[CHr]

USB MSC - use invalid return types in usbd_storage_if.c

=> see stated in the generated comments:

"@retval USBD_OK if all operations are OK else USBD_FAIL"

where USBD_OK = 0, USBD_FAIL = 3 (defined in usbd_def.h)

the functions in usbd_storage_if.c get called in usbd_msc_scsi.c but error/fail is checked by "<0"

e.g.:

if (((USBD_StorageTypeDef *)pdev->pUserData)->Read(lun, hmsc->bot_data,
                                                     hmsc->scsi_blk_addr,
                                                     (len / hmsc->scsi_blk_size)) < 0)

=> return USBD_FAIL will never trigger the error in usbd_storage_if.c

steps to reproduce:

• STM32CubeIDE: new Project with Board: "STM32L4R9I-DISCO"
• Initialize all periphials default... <YES>
• SDMMC1 => already configured
• USB_OTG_FS - Device_only => already configured
• Middleware->USB_DEVICE: set MODE= MASS Storage Class
• Generate Code

STM32CubeIDE Version: 1.4.2

FW_Version:

STM32Cube FW_L4 V1.16.0