'open' and 'close' were already empty. 't1xxp_shutdown' only cleared DAHDI_FLAGBIT_RUNNING which is already done in dahdi-base.c after calling shutdown. Origin: http://svnview.digium.com/svn/dahdi?view=rev&rev=9318 git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/branches/2.4@9692 a0bf4364-ded3-4de4-8d8a-66a801d63aff