Commit 79af72d7 authored Mar 20, 2009 by Kenji Kaneshige Committed by Jesse Barnes Mar 20, 2009

PCI: pci_is_root_bus helper



Introduce pci_is_root_bus helper function. This will help make code
more consistent, as well as prevent incorrect assumptions (such as
pci_bus->self == NULL on a root bus, which is not always true).

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

parent 068258bc

include/linux/pci.h

+9 −0

Original line number	Diff line number	Diff line
		@@ -357,6 +357,15 @@ struct pci_bus {
		#define pci_bus_b(n) list_entry(n, struct pci_bus, node)
		#define to_pci_bus(n) container_of(n, struct pci_bus, dev)

		/*
		* Returns true if the pci bus is root (behind host-pci bridge),
		* false otherwise
		*/
		static inline bool pci_is_root_bus(struct pci_bus *pbus)
		{
		return !(pbus->parent);
		}

		#ifdef CONFIG_PCI_MSI
		static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
		{

Admin message