ACPI: don't duplicate input events on netlink

The previous events patch added a netlink event for every
user of the legacy /proc/acpi/event interface.

However, some users of /proc/acpi/event are really input events,
and they already report their events via the input layer.

Introduce a new interface, acpi_bus_generate_netlink_event(),
which is explicitly called by devices that want to repoprt
events via netlink.  This allows the input-like events
to opt-out of generating netlink events.  In summary:

events that are sent via netlink:
	ac/battery/sbs
	thermal
	processor
	thinkpad_acpi dock/bay

events that are sent via input layer:
	button
	video hotkey
	thinkpad_acpi hotkey
	asus_acpi/asus-laptop hotkey
	sonypi/sonylaptop

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index d8b35093527a..b53c2cfcafd3 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -205,6 +205,9 @@ static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
         case ACPI_NOTIFY_DEVICE_CHECK:
                 acpi_ac_get_state(ac);
                 acpi_bus_generate_event(device, event, (u32) ac->state);
+                acpi_bus_generate_netlink_event(device->pnp.device_class,
+                                                  device->dev.bus_id, event,
+                                                  (u32) ac->state);
                 break;
         default:
                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,