AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-04 13:46:50 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

PCI: pci_is_root_bus helper

Browse Source 
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>
This commit is contained in:
Kenji Kaneshige 2009-03-20 14:55:55 -06:00 committed by Jesse Barnes
parent 068258bc15
commit 79af72d716
1 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
include/linux/pci.h
View File

@ -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)
{