PCI: centralize the capabilities code in probe.c

This patch centralizes the initialization and release functions of
various PCI capabilities in probe.c, which makes the introduction
of new capability support functions cleaner in the future.

Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

drivers/pci/probe.c

@@ -842,6 +842,11 @@ static int pci_setup_device(struct pci_dev * dev)
 	return 0;
 }
 
+static void pci_release_capabilities(struct pci_dev *dev)
+{
+	pci_vpd_release(dev);
+}
+
 /**
  * pci_release_dev - free a pci device structure when all users of it are finished.
  * @dev: device that's been disconnected
@@ -854,7 +859,7 @@ static void pci_release_dev(struct device *dev)
 	struct pci_dev *pci_dev;
 
 	pci_dev = to_pci_dev(dev);
-	pci_vpd_release(pci_dev);
+	pci_release_capabilities(pci_dev);
 	kfree(pci_dev);
 }
 
@@ -935,8 +940,6 @@ struct pci_dev *alloc_pci_dev(void)
 
 	INIT_LIST_HEAD(&dev->bus_list);
 
-	pci_msi_init_pci_dev(dev);
-
 	return dev;
 }
 EXPORT_SYMBOL(alloc_pci_dev);
@@ -1009,11 +1012,21 @@ static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn)
 		return NULL;
 	}
 
-	pci_vpd_pci22_init(dev);
-
 	return dev;
 }
 
+static void pci_init_capabilities(struct pci_dev *dev)
+{
+	/* MSI/MSI-X list */
+	pci_msi_init_pci_dev(dev);
+
+	/* Power Management */
+	pci_pm_init(dev);
+
+	/* Vital Product Data */
+	pci_vpd_pci22_init(dev);
+}
+
 void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
 {
 	device_initialize(&dev->dev);
@@ -1030,8 +1043,8 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
 	/* Fix up broken headers */
 	pci_fixup_device(pci_fixup_header, dev);
 
-	/* Initialize power management of the device */
-	pci_pm_init(dev);
+	/* Initialize various capabilities */
+	pci_init_capabilities(dev);
 
 	/*
 	 * Add the device to our list of discovered devices