pci_pr3_present
adev->has_pr3 = parent ? pci_pr3_present(parent) : false;
*has_pr3 = pci_pr3_present(parent_pdev);
if (!pci_pr3_present(root_pdev)) {
EXPORT_SYMBOL_GPL(pci_pr3_present);
bool pci_pr3_present(struct pci_dev *pdev);
chip->bus.keep_power = parent ? !pci_pr3_present(parent) : 1;