Hi Felipe, I was reading dwc3 codes and found that during the process of configuring event buffer (dwc3_event_buffers_setup), it only write the size of the buffer and doesn't write interrupt mask bit into GEVNTSIZ register like below, dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), evt->length & 0xffff); But in spec, it suggests that write this bit to prevent the interrupt from being generated in an event buffer configuration. So need we set this bit? If I was wrong, please correct me. Thanks, Rui -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html