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, 14 insertions, 6 deletions

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index f6cd34a3dbac..d0825a34a7b0 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -2162,22 +2162,27 @@ static void dock_notify(struct ibm_struct *ibm, u32 event)
         int docked = dock_docked();
         int pci = ibm->acpi->hid && ibm->acpi->device &&
                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
+        int data;
 
         if (event == 1 && !pci) /* 570 */
-                acpi_bus_generate_event(ibm->acpi->device, event, 1);   /* button */
+                data = 1;       /* button */
         else if (event == 1 && pci)     /* 570 */
-                acpi_bus_generate_event(ibm->acpi->device, event, 3);   /* dock */
+                data = 3;       /* dock */
         else if (event == 3 && docked)
-                acpi_bus_generate_event(ibm->acpi->device, event, 1);   /* button */
+                data = 1;       /* button */
         else if (event == 3 && !docked)
-                acpi_bus_generate_event(ibm->acpi->device, event, 2);   /* undock */
+                data = 2;       /* undock */
         else if (event == 0 && docked)
-                acpi_bus_generate_event(ibm->acpi->device, event, 3);   /* dock */
+                data = 3;       /* dock */
         else {
                 printk(IBM_ERR "unknown dock event %d, status %d\n",
                        event, _sta(dock_handle));
-                acpi_bus_generate_event(ibm->acpi->device, event, 0);   /* unknown */
+                data = 0;       /* unknown */
         }
+        acpi_bus_generate_event(ibm->acpi->device, event, data);
+        acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
+                                          ibm->acpi->device->dev.bus_id,
+                                          event, data);
 }
 
 static int dock_read(char *p)
@@ -2276,6 +2281,9 @@ static int __init bay_init(struct ibm_init_struct *iibm)
 static void bay_notify(struct ibm_struct *ibm, u32 event)
 {
         acpi_bus_generate_event(ibm->acpi->device, event, 0);
+        acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
+                                          ibm->acpi->device->dev.bus_id,
+                                          event, 0);
 }
 
 #define bay_occupied(b) (_sta(b##_handle) & 1)