[PATCH v2 04/34] acpi/battery: Move handler installing logic to driver

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Currently logic for installing notifications from ACPI devices is
implemented using notify callback in struct acpi_driver. Preparations
are being made to replace acpi_driver with more generic struct
platform_driver, which doesn't contain notify callback. Furthermore
as of now handlers are being called indirectly through
acpi_notify_device(), which decreases performance.

Call acpi_device_install_event_handler() at the end of .add() callback.
Call acpi_device_remove_event_handler() at the beginning of .remove()
callback. Change arguments passed to the notify callback to match with
what's required by acpi_device_install_event_handler().

Signed-off-by: Michal Wilczynski <michal.wilczynski@xxxxxxxxx>
---
 drivers/acpi/battery.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 9c67ed02d797..0dafe6c14509 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -1034,11 +1034,14 @@ static void acpi_battery_refresh(struct acpi_battery *battery)
 }
 
 /* Driver Interface */
-static void acpi_battery_notify(struct acpi_device *device, u32 event)
+static void acpi_battery_notify(acpi_handle handle, u32 event, void *data)
 {
-	struct acpi_battery *battery = acpi_driver_data(device);
+	struct acpi_device *device = data;
+	struct acpi_battery *battery;
 	struct power_supply *old;
 
+	battery = acpi_driver_data(device);
+
 	if (!battery)
 		return;
 	old = battery->bat;
@@ -1212,6 +1215,10 @@ static int acpi_battery_add(struct acpi_device *device)
 
 	device_init_wakeup(&device->dev, 1);
 
+	result = acpi_device_install_event_handler(device, ACPI_ALL_NOTIFY, acpi_battery_notify);
+	if (result)
+		goto fail;
+
 	return result;
 
 fail:
@@ -1228,6 +1235,7 @@ static void acpi_battery_remove(struct acpi_device *device)
 
 	if (!device || !acpi_driver_data(device))
 		return;
+	acpi_device_remove_event_handler(device, ACPI_ALL_NOTIFY, acpi_battery_notify);
 	device_init_wakeup(&device->dev, 0);
 	battery = acpi_driver_data(device);
 	unregister_pm_notifier(&battery->pm_nb);
@@ -1264,11 +1272,9 @@ static struct acpi_driver acpi_battery_driver = {
 	.name = "battery",
 	.class = ACPI_BATTERY_CLASS,
 	.ids = battery_device_ids,
-	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
 	.ops = {
 		.add = acpi_battery_add,
 		.remove = acpi_battery_remove,
-		.notify = acpi_battery_notify,
 		},
 	.drv.pm = &acpi_battery_pm,
 };
-- 
2.40.1




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