PCI_EXT_CAP_ID_PWR
if (alloc_perm_bits(perm, pci_ext_cap_length[PCI_EXT_CAP_ID_PWR]))
free_perm_bits(&ecap_perms[PCI_EXT_CAP_ID_PWR]);
ret |= init_pci_ext_cap_pwr_perm(&ecap_perms[PCI_EXT_CAP_ID_PWR]);
[PCI_EXT_CAP_ID_PWR] = PCI_EXT_CAP_PWR_SIZEOF,