Hi, Baolin Wang <baolin.w...@linaro.org> writes: > @@ -1742,6 +1791,17 @@ static int dwc3_gadget_stop(struct usb_gadget *g) > dwc->gadget_driver = NULL; > spin_unlock_irqrestore(&dwc->lock, flags); > > + /* > + * Since the xHCI will share the same interrupt with gadget, thus when > + * free the gadget irq, it will not shutdown this gadget irq line. Then > + * the gadget driver can not handle the end transfer command complete > + * event after free the gadget irq, which will hang the system to crash. > + * > + * So we should wait for the end transfer command complete event before > + * free it to avoid this situation. > + */ > + dwc3_wait_command_complete(dwc);
this doesn't make sense. We have already masked all interrupts before getting here. We have also, already, disabled all endpoints. I'm thinking this is a bug in configfs interface of Gadget API, not dwc3. The only reason for this to happen would be if we get to ->udc_stop() with endpoints still enabled. Can you check if that's the case? i.e. can you check if any endpoints are still enabled when we get here? -- balbi
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