sony-laptop: use .notify method instead of installing 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.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
CC: Mattia Dongili <malattia@linux.it>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index a90ec5cb2f20dcb547df43cb7a0f5f45c9abeab9..d3c92d777bde343d95f733ad62f34a20e91da533 100644 (file)
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -914,7 +914,7 @@ static struct sony_nc_event sony_127_events[] = {
 /*
  * ACPI callbacks
  */
-static void sony_acpi_notify(acpi_handle handle, u32 event, void *data)
+static void sony_nc_notify(struct acpi_device *device, u32 event)
 {
        u32 ev = event;
 
@@ -933,7 +933,7 @@ static void sony_acpi_notify(acpi_handle handle, u32 event, void *data)
                        struct sony_nc_event *key_event;
 
                        if (sony_call_snc_handle(key_handle, 0x200, &result)) {
-                               dprintk("sony_acpi_notify, unable to decode"
+                               dprintk("sony_nc_notify, unable to decode"
                                        " event 0x%.2x 0x%.2x\n", key_handle,
                                        ev);
                                /* restore the original event */
@@ -968,7 +968,7 @@ static void sony_acpi_notify(acpi_handle handle, u32 event, void *data)
        } else
                sony_laptop_report_input_event(ev);
 
-       dprintk("sony_acpi_notify, event: 0x%.2x\n", ev);
+       dprintk("sony_nc_notify, event: 0x%.2x\n", ev);
        acpi_bus_generate_proc_event(sony_nc_acpi_device, 1, ev);
 }
 
@@ -1276,15 +1276,6 @@ static int sony_nc_add(struct acpi_device *device)
                goto outwalk;
        }
 
-       status = acpi_install_notify_handler(sony_nc_acpi_handle,
-                                            ACPI_DEVICE_NOTIFY,
-                                            sony_acpi_notify, NULL);
-       if (ACPI_FAILURE(status)) {
-               printk(KERN_WARNING DRV_PFX "unable to install notify handler (%u)\n", status);
-               result = -ENODEV;
-               goto outinput;
-       }
-
        if (acpi_video_backlight_support()) {
                printk(KERN_INFO DRV_PFX "brightness ignored, must be "
                       "controlled by ACPI video driver\n");
@@ -1362,13 +1353,6 @@ static int sony_nc_add(struct acpi_device *device)
        if (sony_backlight_device)
                backlight_device_unregister(sony_backlight_device);
 
-       status = acpi_remove_notify_handler(sony_nc_acpi_handle,
-                                           ACPI_DEVICE_NOTIFY,
-                                           sony_acpi_notify);
-       if (ACPI_FAILURE(status))
-               printk(KERN_WARNING DRV_PFX "unable to remove notify handler\n");
-
-      outinput:
        sony_laptop_remove_input();
 
       outwalk:
@@ -1378,7 +1362,6 @@ static int sony_nc_add(struct acpi_device *device)
 
 static int sony_nc_remove(struct acpi_device *device, int type)
 {
-       acpi_status status;
        struct sony_nc_value *item;
 
        if (sony_backlight_device)
@@ -1386,12 +1369,6 @@ static int sony_nc_remove(struct acpi_device *device, int type)
 
        sony_nc_acpi_device = NULL;
 
-       status = acpi_remove_notify_handler(sony_nc_acpi_handle,
-                                           ACPI_DEVICE_NOTIFY,
-                                           sony_acpi_notify);
-       if (ACPI_FAILURE(status))
-               printk(KERN_WARNING DRV_PFX "unable to remove notify handler\n");
-
        for (item = sony_nc_values; item->name; ++item) {
                device_remove_file(&sony_pf_device->dev, &item->devattr);
        }
@@ -1425,6 +1402,7 @@ static struct acpi_driver sony_nc_driver = {
                .add = sony_nc_add,
                .remove = sony_nc_remove,
                .resume = sony_nc_resume,
+               .notify = sony_nc_notify,
                },
 };