usb_hcd_irq
return usb_hcd_irq(ci->irq, ci->hcd);
usb_hcd_irq(0, hcd);
EXPORT_SYMBOL_GPL(usb_hcd_irq);
retval = request_irq(irqnum, &usb_hcd_irq, irqflags,
ret = request_irq(pdev->irq, &usb_hcd_irq, IRQF_SHARED, hcd->irq_descr, hcd);
extern irqreturn_t usb_hcd_irq(int irq, void *__hcd);