usb_release_bandwidth - reverses effect of usb_claim_bandwidth
void usb_release_bandwidth (struct usb_device * dev, struct urb * urb, int isoc);
dev source/target of request urb request (urb->dev == dev) isoc true iff the request is isochronous
This records that previously allocated bandwidth has been released. Bandwidth is released when endpoints are removed from the host controller’s periodic schedule.