ACPI / button: Add ACPI Button event via netlink routine

Commit 1696d9d (ACPI: Remove the old /proc/acpi/event interface)
removed ACPI Button event which originally was sent to userspace via
/proc/acpi/event. This caused ACPI shutdown regression on gentoo
in VirtualBox. Now ACPI events are sent to userspace via netlink,
so add ACPI Button event back via netlink routine.

References: https://bugzilla.kernel.org/show_bug.cgi?id=71721
Reported-and-tested-by: Richard Musil <richard.musil@gmail.com>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Cc: 3.11+ <stable@vger.kernel.org> # 3.11+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index 714e957a871a8034ed18be2104b8c107d0b4ced9..db35594d4df7a072a76e0c2fb879c324efdcedb8 100644 (file)
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -302,6 +302,10 @@ static void acpi_button_notify(struct acpi_device *device, u32 event)
                        input_sync(input);
 
                        pm_wakeup_event(&device->dev, 0);
+                       acpi_bus_generate_netlink_event(
+                                       device->pnp.device_class,
+                                       dev_name(&device->dev),
+                                       event, ++button->pushed);
                }
                break;
        default: