diff options
| author | Toshi Kani <toshi.kani@hp.com> | 2013-11-20 14:25:34 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-04 11:05:40 -0800 |
| commit | 8c4baca915377987f3b5d266157c74925f6107f8 (patch) | |
| tree | a2cd340b0737679b6e75ecf7abae81faba286971 /drivers/acpi | |
| parent | 45364a2de511d66a477235376bee161038cba4bc (diff) | |
ACPI / hotplug: Fix conflicted PCI bridge notify handlers
commit ca499fc87ed945094d952da0eb7eea7dbeb1feec upstream.
The PCI host bridge scan handler installs its own notify handler,
handle_hotplug_event_root(), by itself. Nevertheless, the ACPI
hotplug framework also installs the common notify handler,
acpi_hotplug_notify_cb(), for PCI root bridges. This causes
acpi_hotplug_notify_cb() to call _OST method with unsupported
error as hotplug.enabled is not set.
To address this issue, introduce hotplug.ignore flag, which
indicates that the scan handler installs its own notify handler by
itself. The ACPI hotplug framework does not install the common
notify handler when this flag is set.
Signed-off-by: Toshi Kani <toshi.kani@hp.com>
[rjw: Changed the name of the new flag]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/pci_root.c | 3 | ||||
| -rw-r--r-- | drivers/acpi/scan.c | 2 |
2 files changed, 4 insertions, 1 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index d7e53ea53d6c..79de26ed27c9 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -63,6 +63,9 @@ static struct acpi_scan_handler pci_root_handler = { .ids = root_device_ids, .attach = acpi_pci_root_add, .detach = acpi_pci_root_remove, + .hotplug = { + .ignore = true, + }, }; static DEFINE_MUTEX(osc_lock); diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 3601738ef6f4..d047771c179a 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1812,7 +1812,7 @@ static void acpi_scan_init_hotplug(acpi_handle handle, int type) */ list_for_each_entry(hwid, &pnp.ids, list) { handler = acpi_scan_match_handler(hwid->id, NULL); - if (handler) { + if (handler && !handler->hotplug.ignore) { acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, acpi_hotplug_notify_cb, handler); break; |