fujitsu-laptop: use .notify method instead of installing hotkey handler directly

This patch adds a .notify() method.  The presence of .notify() causes
Linux/ACPI to manage event handlers and notify handlers on our behalf,
so we don't have to install and remove them ourselves.

Tested by Tony on Fujitsu-Siemens Lifebook S6420 [FJNB1E6] with
BIOS 1.18 (01/09/2009).  Tested by Jonathan on Fujitsu S7020.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Tony Vroon <tony@linx.net>
Tested-By: Tony Vroon <tony@linx.net>
Acked-by: Jonathan Woithe <jwoithe@physics.adelaide.edu.au>
Tested-by: Jonathan Woithe <jwoithe@physics.adelaide.edu.au>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
index 10f8796..218b9a1 100644 (file)
--- a/drivers/platform/x86/fujitsu-laptop.c
+++ b/drivers/platform/x86/fujitsu-laptop.c
@@ -174,8 +174,7 @@ struct fujitsu_hotkey_t {
 
 static struct fujitsu_hotkey_t *fujitsu_hotkey;
 
-static void acpi_fujitsu_hotkey_notify(acpi_handle handle, u32 event,
-                                      void *data);
+static void acpi_fujitsu_hotkey_notify(struct acpi_device *device, u32 event);
 
 #ifdef CONFIG_LEDS_CLASS
 static enum led_brightness logolamp_get(struct led_classdev *cdev);
@@ -816,7 +815,6 @@ static void acpi_fujitsu_notify(struct acpi_device *device, u32 event)
 
 static int acpi_fujitsu_hotkey_add(struct acpi_device *device)
 {
-       acpi_status status;
        acpi_handle handle;
        int result = 0;
        int state = 0;
@@ -833,17 +831,6 @@ static int acpi_fujitsu_hotkey_add(struct acpi_device *device)
        sprintf(acpi_device_class(device), "%s", ACPI_FUJITSU_CLASS);
        device->driver_data = fujitsu_hotkey;
 
-       status = acpi_install_notify_handler(device->handle,
-                                            ACPI_DEVICE_NOTIFY,
-                                            acpi_fujitsu_hotkey_notify,
-                                            fujitsu_hotkey);
-
-       if (ACPI_FAILURE(status)) {
-               printk(KERN_ERR "Error installing notify handler\n");
-               error = -ENODEV;
-               goto err_stop;
-       }
-
        /* kfifo */
        spin_lock_init(&fujitsu_hotkey->fifo_lock);
        fujitsu_hotkey->fifo =
@@ -858,7 +845,7 @@ static int acpi_fujitsu_hotkey_add(struct acpi_device *device)
        fujitsu_hotkey->input = input = input_allocate_device();
        if (!input) {
                error = -ENOMEM;
-               goto err_uninstall_notify;
+               goto err_free_fifo;
        }
 
        snprintf(fujitsu_hotkey->phys, sizeof(fujitsu_hotkey->phys),
@@ -954,9 +941,7 @@ static int acpi_fujitsu_hotkey_add(struct acpi_device *device)
 end:
 err_free_input_dev:
        input_free_device(input);
-err_uninstall_notify:
-       acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
-                                  acpi_fujitsu_hotkey_notify);
+err_free_fifo:
        kfifo_free(fujitsu_hotkey->fifo);
 err_stop:
 
@@ -965,7 +950,6 @@ err_stop:
 
 static int acpi_fujitsu_hotkey_remove(struct acpi_device *device, int type)
 {
-       acpi_status status;
        struct fujitsu_hotkey_t *fujitsu_hotkey = NULL;
 
        if (!device || !acpi_driver_data(device))
@@ -973,10 +957,6 @@ static int acpi_fujitsu_hotkey_remove(struct acpi_device *device, int type)
 
        fujitsu_hotkey = acpi_driver_data(device);
 
-       status = acpi_remove_notify_handler(fujitsu_hotkey->acpi_handle,
-                                           ACPI_DEVICE_NOTIFY,
-                                           acpi_fujitsu_hotkey_notify);
-
        fujitsu_hotkey->acpi_handle = NULL;
 
        kfifo_free(fujitsu_hotkey->fifo);
@@ -984,8 +964,7 @@ static int acpi_fujitsu_hotkey_remove(struct acpi_device *device, int type)
        return 0;
 }
 
-static void acpi_fujitsu_hotkey_notify(acpi_handle handle, u32 event,
-                                      void *data)
+static void acpi_fujitsu_hotkey_notify(struct acpi_device *device, u32 event)
 {
        struct input_dev *input;
        int keycode, keycode_r;
@@ -1068,8 +1047,6 @@ static void acpi_fujitsu_hotkey_notify(acpi_handle handle, u32 event,
                input_sync(input);
                break;
        }
-
-       return;
 }
 
 /* Initialization */
@@ -1102,6 +1079,7 @@ static struct acpi_driver acpi_fujitsu_hotkey_driver = {
        .ops = {
                .add = acpi_fujitsu_hotkey_add,
                .remove = acpi_fujitsu_hotkey_remove,
+               .notify = acpi_fujitsu_hotkey_notify,
                },
 };