This is instead of initializing the waitq each time the channel is opened or closed. Signed-off-by: Shaun Ruffell <sruffell@digium.com> Acked-by: Russ Meyerreicks <rmeyerreicks@digium.com> git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9549 a0bf4364-ded3-4de4-8d8a-66a801d63aff