===================================================================
@@ -53,12 +53,12 @@ extern acpi_status pci_osc_control_set(a
int pci_acpi_osc_support(acpi_handle handle, u32 flags);
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)
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> --- include/linux/pci-acpi.h | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html