ldc_chkq
rv = ldc_chkq(port->ldc.hdl, &hasdata);
(void) ldc_chkq(vport->ldc_handle, &hasdata);
if ((ldc_chkq(vport->ldc_handle, &haspkts) == 0) &&
rv = ldc_chkq(ldcp->ldc_handle, &has_data);
int ldc_chkq(ldc_handle_t handle, boolean_t *hasdata);