pci_find_capability
return pci_find_capability(dev, PCI_CAP_ID_EXP);
pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
if (pci_find_capability(mdev->pdev, PCI_CAP_ID_PCIX)) {
hca_pcix_cap = pci_find_capability(mdev->pdev, PCI_CAP_ID_PCIX);
hca_pcie_cap = pci_find_capability(mdev->pdev, PCI_CAP_ID_EXP);
bridge_pcix_cap = pci_find_capability(bridge, PCI_CAP_ID_PCIX);