[PATCH v3 21/34] platform/x86/fujitsu-laptop: Move handler installing logic to driver

[Michal Wilczynski <michal.wilczynski@xxxxxxxxx>]

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/platform/x86/fujitsu-laptop.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
index 085e044e888e..e270660c0762 100644
--- a/drivers/platform/x86/fujitsu-laptop.c
+++ b/drivers/platform/x86/fujitsu-laptop.c
@@ -136,6 +136,8 @@ struct fujitsu_laptop {
 
 static struct acpi_device *fext;
 
+static void acpi_fujitsu_laptop_notify(acpi_handle handle, u32 event, void *data);
+
 /* Fujitsu ACPI interface function */
 
 static int call_fext_func(struct acpi_device *device,
@@ -839,7 +841,12 @@ static int acpi_fujitsu_laptop_add(struct acpi_device *device)
 	if (ret)
 		goto err_free_fifo;
 
-	return 0;
+	ret = acpi_device_install_event_handler(device, ACPI_DEVICE_NOTIFY,
+						acpi_fujitsu_laptop_notify);
+	if (ret)
+		goto err_free_fifo;
+
+	return ret;
 
 err_free_fifo:
 	kfifo_free(&priv->fifo);
@@ -851,6 +858,8 @@ static void acpi_fujitsu_laptop_remove(struct acpi_device *device)
 {
 	struct fujitsu_laptop *priv = acpi_driver_data(device);
 
+	acpi_device_remove_event_handler(device, ACPI_DEVICE_NOTIFY, acpi_fujitsu_laptop_notify);
+
 	fujitsu_laptop_platform_remove(device);
 
 	kfifo_free(&priv->fifo);
@@ -889,13 +898,16 @@ static void acpi_fujitsu_laptop_release(struct acpi_device *device)
 	}
 }
 
-static void acpi_fujitsu_laptop_notify(struct acpi_device *device, u32 event)
+static void acpi_fujitsu_laptop_notify(acpi_handle handle, u32 event, void *data)
 {
-	struct fujitsu_laptop *priv = acpi_driver_data(device);
+	struct acpi_device *device = data;
+	struct fujitsu_laptop *priv;
 	unsigned long flags;
 	int scancode, i = 0;
 	unsigned int irb;
 
+	priv = acpi_driver_data(device);
+
 	if (event != ACPI_FUJITSU_NOTIFY_CODE) {
 		acpi_handle_info(device->handle, "Unsupported event [0x%x]\n",
 				 event);
@@ -963,7 +975,6 @@ static struct acpi_driver acpi_fujitsu_laptop_driver = {
 	.ops = {
 		.add = acpi_fujitsu_laptop_add,
 		.remove = acpi_fujitsu_laptop_remove,
-		.notify = acpi_fujitsu_laptop_notify,
 		},
 };
 
-- 
2.40.1