suse man page for usb_autopm_get_interface

USB_AUTOPM_GET_INTER(9) 					   USB Core APIs					   USB_AUTOPM_GET_INTER(9)

NAME
       usb_autopm_get_interface - increment a USB interface's PM-usage counter

SYNOPSIS
       int usb_autopm_get_interface(struct usb_interface * intf);

ARGUMENTS
       intf
	   the usb_interface whose counter should be incremented

DESCRIPTION
       This routine should be called by an interface driver when it wants to use intf and needs to guarantee that it is not suspended. In
       addition, the routine prevents intf from being autosuspended subsequently. (Note that this will not prevent suspend events originating in
       the PM core.) This prevention will persist until usb_autopm_put_interface is called or intf is unbound. A typical example would be a
       character-device driver when its device file is opened.

       intf's usage counter is incremented to prevent subsequent autosuspends. However if the autoresume fails then the counter is re-decremented.

       This routine can run only in process context.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010						   USB_AUTOPM_GET_INTER(9)