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This reduces the chance that another interrupt will interfere with the recovery process. Otherwise it is possible that the hardware advances past the position that we think it is currently at. Signed-off-by: Shaun Ruffell <sruffell@digium.com> Acked-by: Kinsey Moore <kmoore@digium.com> Acked-By: Russ Meyerriecks <rmeyerriecks@digium.com> git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9535 a0bf4364-ded3-4de4-8d8a-66a801d63aff