IBD_RC_STATE_ACT_CLOSING
IBD_RC_STATE_ACT_CLOSING;
IBD_RC_STATE_ACT_CLOSING;
pre_ace->ac_chan->chan_state = IBD_RC_STATE_ACT_CLOSING;
case IBD_RC_STATE_ACT_CLOSING: /* stale, close it */
rc_chan->chan_state = IBD_RC_STATE_ACT_CLOSING;
IBD_RC_STATE_ACT_CLOSING;