dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START;
- root = debugfs_create_dir(dev_name(dwc->dev), NULL);
+ root = debugfs_create_dir(dev_name(dwc->dev), usb_debug_root);
dwc->root = root;
debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);