BFE_BAR0_WIN
bar_orig = pci_read_config(sc->bfe_dev, BFE_BAR0_WIN, 4);
pci_write_config(sc->bfe_dev, BFE_BAR0_WIN, BFE_REG_PCI, 4);
pci_write_config(sc->bfe_dev, BFE_BAR0_WIN, bar_orig, 4);