pcibios_write_config_dword
pcibios_write_config_dword(pci->bus, pci->devfn, 0x40, 0x00000000);
pcibios_write_config_dword(pci->bus, pci->devfn, PCIPM, newtmp);
extern int pcibios_write_config_dword(unsigned int bus, unsigned int device_fn, unsigned int where, uint32_t value);
return pcibios_write_config_dword(dev->bus, dev->devfn, where, value);
pcibios_write_config_dword(pci->bus, pci->devfn, 0x40, 0x00000000);
pcibios_write_config_dword(pci->bus, pci->devfn, 0x40, 0x00000000);