Operating System

Windows 11

Commit SHA

331c263

Board

STM32F746G-DISCO

Firmware

Custom firmware with FreeRTOS and USBFS DWC2 driver (based on examples/uac2_headset)

What happened ?

On version v0.18.0, UAC2 examples & my custom firmware works with no problems.
On version v0.19.0 (and latest master) the software hangs in FreeRTOS assertion because taskENTER_CRITICAL() was called from ISR.

In dcd_edpt_xfer() there is a spinlock which assumes non-interrupt context.

bool dcd_edpt_xfer(uint8_t rhport, uint8_t ep_addr, uint8_t* buffer, uint16_t total_bytes) {
  uint8_t const epnum = tu_edpt_number(ep_addr);
  uint8_t const dir = tu_edpt_dir(ep_addr);
  xfer_ctl_t* xfer = XFER_CTL_BASE(epnum, dir);
  bool ret;

  usbd_spin_lock(false); <--- THIS

...

In attatched image, you can see a callstack and call hierarchy of dcd_edpt_xfer().
Call hierarchy shows that its called from:
audio_tx_xfer_isr and audio_rx_xfer_isr

How to reproduce ?

Checkout to v0.19.0 and run uac2_headset example

Debug Log as txt file (LOG/CFG_TUSB_DEBUG=2)

Screenshots

No response

I have checked existing issues, discussion and documentation

• I confirm I have checked existing issues, discussion and documentation.