PCI_BRIDGE_CTL_FAST_BACK
status &= ~(PCI_BRIDGE_CTL_BUS_RESET|PCI_BRIDGE_CTL_FAST_BACK);
bus->bridge_ctl |= PCI_BRIDGE_CTL_FAST_BACK;
if (dev->bus->bridge_ctl & PCI_BRIDGE_CTL_FAST_BACK)
.ro = (GENMASK(15, 8) | ((PCI_BRIDGE_CTL_FAST_BACK) << 16)),
~((PCI_BRIDGE_CTL_FAST_BACK) << 16);