diff options
| author | Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> | 2009-02-17 08:12:36 +0300 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-03-20 20:47:57 +0300 |
| commit | d18690af626b83fef1d1953b9f70e09497060586 (patch) | |
| tree | f3d3d851318faded0097a271694e72f39a9d9ea6 | |
| parent | 0747aaf42d78d26684c6f6b34a4103ff81f571f8 (diff) | |
| download | linux-d18690af626b83fef1d1953b9f70e09497060586.tar.xz | |
PCI/ACPI: fix wrong assumption in acpi_find_root_bridge_handle
Current acpi_find_root_bridge_handle() has a assumption that
pci_bus->self is NULL on the root pci bus. But it might not be true on
some platforms. Because of this wrong assumption, current
acpi_find_root_bridge_handle() might cause endless loop. We must check
pci_bus->parent instead.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| -rw-r--r-- | include/linux/pci-acpi.h | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h index 3cee2367459f..092e82e0048c 100644 --- a/include/linux/pci-acpi.h +++ b/include/linux/pci-acpi.h @@ -13,12 +13,12 @@ #ifdef CONFIG_ACPI static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev) { - /* Find root host bridge */ - while (pdev->bus->self) - pdev = pdev->bus->self; - - return acpi_get_pci_rootbridge_handle(pci_domain_nr(pdev->bus), - pdev->bus->number); + struct pci_bus *pbus = pdev->bus; + /* Find a PCI root bus */ + while (pbus->parent) + pbus = pbus->parent; + return acpi_get_pci_rootbridge_handle(pci_domain_nr(pbus), + pbus->number); } static inline acpi_handle acpi_pci_get_bridge_handle(struct pci_bus *pbus) |