BPF_WAITING
d->bd_state = BPF_WAITING;
if (d->bd_state == BPF_WAITING)
if (d->bd_state == BPF_WAITING)
if (d->bd_state == BPF_WAITING) {
if (d->bd_state == BPF_WAITING)
else if (bpf.bd_state == BPF_WAITING)
case BPF_WAITING: