VF_FREE
if (vf->state != VF_FREE &&
if (p_vf->state != VF_STOPPED && p_vf->state != VF_FREE) {
return (p_vf->state == VF_FREE);
return (p_vf->state != VF_FREE && p_vf->state != VF_STOPPED);
vf->state = VF_FREE;