Hook irqs to hcd framework (bus glue)
irqreturn_t usb_hcd_irq(int irq, void * __hcd);
irq
the IRQ being raised
__hcd
pointer to the HCD whose IRQ is being signaled
If the controller isn't HALTed, calls the driver's irq handler. Checks whether the controller is now dead.
IRQ_HANDLED if the IRQ was handled. IRQ_NONE otherwise.