diff options
| author | Toshi Kani <toshi.kani@hp.com> | 2013-11-20 14:25:34 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-11-20 14:25:34 +0100 |
| commit | ca499fc87ed945094d952da0eb7eea7dbeb1feec (patch) | |
| tree | 2bc0d81c4c782077abeef722a82ff081484c2f90 /drivers | |
| parent | 296e5809ee567e41d55da41a882abef9d8071e5e (diff) | |
| download | linux-ca499fc87ed945094d952da0eb7eea7dbeb1feec.tar.bz2 | |
ACPI / hotplug: Fix conflicted PCI bridge notify handlers
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]
Cc: 3.9+ <stable@vger.kernel.org> # 3.9+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers')
| -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 b5cb729328a4..a84ea1b51a89 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -65,6 +65,9 @@ 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 ce518867a18a..e76b5230f476 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1773,7 +1773,7 @@ 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; |