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authorToshi Kani <toshi.kani@hp.com>2013-11-20 14:25:34 +0100
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-11-20 14:25:34 +0100
commitca499fc87ed945094d952da0eb7eea7dbeb1feec (patch)
tree2bc0d81c4c782077abeef722a82ff081484c2f90 /drivers/acpi
parent296e5809ee567e41d55da41a882abef9d8071e5e (diff)
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/acpi')
-rw-r--r--drivers/acpi/pci_root.c3
-rw-r--r--drivers/acpi/scan.c2
2 files changed, 4 insertions, 1 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index b5cb729328a..a84ea1b51a8 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 ce518867a18..e76b5230f47 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;