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, 9 insertions, 4 deletions

diff --git a/drivers/acpi/event.c b/drivers/acpi/event.c
index 95637a4ff782..b7b143288c22 100644
--- a/drivers/acpi/event.c
+++ b/drivers/acpi/event.c
@@ -147,7 +147,8 @@ static struct genl_multicast_group acpi_event_mcgrp = {
 	.name = ACPI_GENL_MCAST_GROUP_NAME,
 };
 
-int acpi_bus_generate_genetlink_event(struct acpi_device *device,
+int acpi_bus_generate_netlink_event(const char *device_class,
+				      const char *bus_id,
 				      u8 type, int data)
 {
 	struct sk_buff *skb;
@@ -191,8 +192,8 @@ int acpi_bus_generate_genetlink_event(struct acpi_device *device,
 
 	memset(event, 0, sizeof(struct acpi_genl_event));
 
-	strcpy(event->device_class, device->pnp.device_class);
-	strcpy(event->bus_id, device->dev.bus_id);
+	strcpy(event->device_class, device_class);
+	strcpy(event->bus_id, bus_id);
 	event->type = type;
 	event->data = data;
 
@@ -211,6 +212,8 @@ int acpi_bus_generate_genetlink_event(struct acpi_device *device,
 	return 0;
 }
 
+EXPORT_SYMBOL(acpi_bus_generate_netlink_event);
+
 static int acpi_event_genetlink_init(void)
 {
 	int result;
@@ -228,12 +231,14 @@ static int acpi_event_genetlink_init(void)
 }
 
 #else
-int acpi_bus_generate_genetlink_event(struct acpi_device *device, u8 type,
+int acpi_bus_generate_netlink_event(struct acpi_device *device, u8 type,
 				      int data)
 {
 	return 0;
 }
 
+EXPORT_SYMBOL(acpi_generate_netlink_event);
+
 static int acpi_event_genetlink_init(void)
 {
 	return -ENODEV;