Man page 9 : usb_autopm_put_interface

usb_autopm_put_interface - decrement a USB interfaceAqs PM-usage counter

void usb_autopm_put_interface(struct usb_interface *  intf );

intf
    the usb_interface whose counter should be decremented

This routine should be called by an interface driver when it is finished using intf and wants to allow it to autosuspend. A typical example would be a character-device driver when its device file is closed.

The routine decrements intfAqs usage counter. When the counter reaches 0, a delayed autosuspend request for intfAqs device is attempted. The attempt may fail (see autosuspend_check).

This routine can run only in process context.