usb_string_id(9) centos man page | unix.com

USB_STRING_ID(9)					      Kernel Mode Gadget API						  USB_STRING_ID(9)

NAME
       usb_string_id - allocate an unused string ID

SYNOPSIS
       int usb_string_id(struct usb_composite_dev * cdev);

ARGUMENTS
       cdev
	   the device whose string descriptor IDs are being allocated

CONTEXT
       single threaded during gadget setup

DESCRIPTION
       usb_string_id() is called from bind callbacks to allocate string IDs. Drivers for functions, configurations, or gadgets will then store
       that ID in the appropriate descriptors and string table.

       All string identifier should be allocated using this, usb_string_ids_tab() or usb_string_ids_n() routine, to ensure that for example
       different functions don't wrongly assign different meanings to the same identifier.

AUTHOR
       David Brownell <dbrownell@users.sourceforge.net>
	   Author.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							  USB_STRING_ID(9)