[PATCH 3.12 30/50] ACPI / button: Add ACPI Button event via netlink routine

[Jiri Slaby]

From: Lan Tianyu <tianyu.lan@xxxxxxxxx>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 0bf6368ee8f25826d0645c0f7a4f17c8845356a4 upstream.

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@xxxxxxxxx>
Signed-off-by: Lan Tianyu <tianyu.lan@xxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
 drivers/acpi/button.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index a55773801c5f..3aa89eb8dbbd 100644
--- 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:
-- 
1.9.2

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