tree 9269cdd17d93253e33620317a8fff5226d5f8ebf
parent f11f4bc027414bc7db5dde49c55b7149a627b591
author Bernie Thompson <bernie@plugable.com> 1283729719 -0700
committer Greg Kroah-Hartman <gregkh@suse.de> 1283730618 -0700

staging: udlfb: revamp reference handling to insure successful shutdown

Revamp reference handling and synchronization for unload/shutdown

Udlfb is a "virtual" framebuffer device that really exists on
two separate stacks: at the bottom of the framebuffer interface,
and on top of USB.  During unload, there's no guarantee which
one will tear down first. So reference counting must be solid
to handle all possibilities and not access anything once its gone.

Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>