[PATCH v4 15/35] platform/x86/acer-wireless: 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/acer-wireless.c | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/acer-wireless.c b/drivers/platform/x86/acer-wireless.c
index 1b5d935d085a..af7aef27cdff 100644
--- a/drivers/platform/x86/acer-wireless.c
+++ b/drivers/platform/x86/acer-wireless.c
@@ -18,9 +18,12 @@ static const struct acpi_device_id acer_wireless_acpi_ids[] = {
 };
 MODULE_DEVICE_TABLE(acpi, acer_wireless_acpi_ids);
 
-static void acer_wireless_notify(struct acpi_device *adev, u32 event)
+static void acer_wireless_notify(acpi_handle handle, u32 event, void *data)
 {
-	struct input_dev *idev = acpi_driver_data(adev);
+	struct acpi_device *adev = data;
+	struct input_dev *idev;
+
+	idev = acpi_driver_data(adev);
 
 	dev_dbg(&adev->dev, "event=%#x\n", event);
 	if (event != 0x80) {
@@ -36,6 +39,7 @@ static void acer_wireless_notify(struct acpi_device *adev, u32 event)
 static int acer_wireless_add(struct acpi_device *adev)
 {
 	struct input_dev *idev;
+	int ret;
 
 	idev = devm_input_allocate_device(&adev->dev);
 	if (!idev)
@@ -50,7 +54,17 @@ static int acer_wireless_add(struct acpi_device *adev)
 	set_bit(EV_KEY, idev->evbit);
 	set_bit(KEY_RFKILL, idev->keybit);
 
-	return input_register_device(idev);
+	ret = input_register_device(idev);
+
+	if (ret)
+		return ret;
+
+	return acpi_device_install_event_handler(adev, ACPI_DEVICE_NOTIFY, acer_wireless_notify);
+}
+
+static void acer_wireless_remove(struct acpi_device *adev)
+{
+	acpi_device_remove_event_handler(adev, ACPI_DEVICE_NOTIFY, acer_wireless_notify);
 }
 
 static struct acpi_driver acer_wireless_driver = {
@@ -59,7 +73,7 @@ static struct acpi_driver acer_wireless_driver = {
 	.ids = acer_wireless_acpi_ids,
 	.ops = {
 		.add = acer_wireless_add,
-		.notify = acer_wireless_notify,
+		.remove = acer_wireless_remove,
 	},
 };
 module_acpi_driver(acer_wireless_driver);
-- 
2.40.1