tree f35e277cdd32267772854b481843299564e4f3e8
parent 8066134ff8140ae9d8d15cdad3fc6c60c2a8a4e5
author David Brownell <dbrownell@users.sourceforge.net> 1219106302 -0700
committer Greg Kroah-Hartman <gregkh@suse.de> 1224279653 -0700

usb gadget: function activation/deactivation

Add a new mechanism to the composite gadget framework, letting
functions deactivate (and reactivate) themselves.  Think of it
as a refcounted wrapper for the software pullup control.

A key example of why to use this mechanism involves functions that
require a userspace daemon.  Those functions shuld use this new
mechanism to prevent the gadget from enumerating until those daemons
are activated.  Without this mechanism, hosts would see devices that
malfunction until the relevant daemons start.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>