AHCI_ATTACH
ahci_ctlp->ahcictl_flags &= ~AHCI_ATTACH;
if (ahci_ctlp->ahcictl_flags & AHCI_ATTACH)
ahci_ctlp->ahcictl_flags |= AHCI_ATTACH;
if (ahci_ctlp->ahcictl_flags & AHCI_ATTACH) {
ASSERT(ahci_ctlp->ahcictl_flags & (AHCI_ATTACH | AHCI_QUIESCE) ||