I add a jmp $ here. After the code reach the loop, I press the reset button.
Then the set address command can not be success.


@@ -972,12 +974,13 @@ xhci_alloc_pipe(struct usbdevice_s *usbdev
         // Send set_address command.
         int cc = xhci_cmd_address_device(xhci, slotid, in);
         if (cc != CC_SUCCESS) {
             dprintf(1, "%s: address device: failed (cc %d)\n", __func__, cc);
             goto fail;
         }
+    asm volatile ("1: jmp 1b");
     } else {
         pipe->slotid = usbdev->slotid;
         // Send configure command.
         int cc = xhci_cmd_configure_endpoint(xhci, pipe->slotid, in);
         if (cc != CC_SUCCESS) {
             dprintf(1, "%s: configure endpoint: failed (cc %d)\n", __func__, cc);
 
Zheng