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| author | Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> | 2009-02-17 14:13:20 +0900 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-03-20 10:48:00 -0700 |
| commit | 267efd7eec5eca62f32f8c9bc1721b578d5da963 (patch) | |
| tree | 3bae75d213470f6b56341b1a6328650299b5784b /drivers/pci/hotplug | |
| parent | d18690af626b83fef1d1953b9f70e09497060586 (diff) | |
| download | blackbird-op-linux-267efd7eec5eca62f32f8c9bc1721b578d5da963.tar.gz blackbird-op-linux-267efd7eec5eca62f32f8c9bc1721b578d5da963.zip | |
PCI hotplug: fix wrong assumption in acpi_get_hp_params_from_firmware
Current acpi_get_hp_params_from_firmware() has a assumption that
pci_bus->self is NULL on the root pci bus. But it might not true on
some platforms. Because of this wrong assumption, current
acpi_get_hp_params_from_firmware() 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>
Diffstat (limited to 'drivers/pci/hotplug')
| -rw-r--r-- | drivers/pci/hotplug/acpi_pcihp.c | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/drivers/pci/hotplug/acpi_pcihp.c b/drivers/pci/hotplug/acpi_pcihp.c index f47bc74be567..09a84402986d 100644 --- a/drivers/pci/hotplug/acpi_pcihp.c +++ b/drivers/pci/hotplug/acpi_pcihp.c @@ -332,19 +332,14 @@ acpi_status acpi_get_hp_params_from_firmware(struct pci_bus *bus, { acpi_status status = AE_NOT_FOUND; acpi_handle handle, phandle; - struct pci_bus *pbus = bus; - struct pci_dev *pdev; + struct pci_bus *pbus; - do { - pdev = pbus->self; - if (!pdev) { - handle = acpi_get_pci_rootbridge_handle( - pci_domain_nr(pbus), pbus->number); + handle = NULL; + for (pbus = bus; pbus; pbus = pbus->parent) { + handle = acpi_pci_get_bridge_handle(pbus); + if (handle) break; - } - handle = DEVICE_ACPI_HANDLE(&(pdev->dev)); - pbus = pbus->parent; - } while (!handle); + } /* * _HPP settings apply to all child buses, until another _HPP is |
