Usb_alloc_dev (9) Linux Manual Page

usb_alloc_dev – usb device constructor (usbcore-internal)

Synopsis

struct usb_device *usb_alloc_dev(struct usb_device *parent, struct usb_bus *bus, unsigned port1);

parent

hub to which device is connected; null to allocate a root hub

bus

bus used to access the device

port1

one-based index of port; ignored for root hubs

!in_interrupt

Only hub drivers (including virtual root hub drivers for host controllers) should ever call this.

This call may not be used in a non-sleeping context.

On success, a pointer to the allocated usb device. NULL on failure.