USB_ALLOC_DEV(9)                          USB Core APIs                          USB_ALLOC_DEV(9)



NAME
       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);

ARGUMENTS
       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

CONTEXT
       !in_interrupt

DESCRIPTION
       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.

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

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                          USB_ALLOC_DEV(9)