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/button.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index ef77c14c72a9..96ed1877a61a 100644
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -135,7 +135,7 @@ static const struct dmi_system_id dmi_lid_quirks[] = {
static int acpi_button_add(struct acpi_device *device);
static void acpi_button_remove(struct acpi_device *device);
-static void acpi_button_notify(struct acpi_device *device, u32 event);
+static void acpi_button_notify(acpi_handle handle, u32 event, void *data);
#ifdef CONFIG_PM_SLEEP
static int acpi_button_suspend(struct device *dev);
@@ -153,7 +153,6 @@ static struct acpi_driver acpi_button_driver = {
.ops = {
.add = acpi_button_add,
.remove = acpi_button_remove,
- .notify = acpi_button_notify,
},
.drv.pm = &acpi_button_pm,
};
@@ -409,11 +408,14 @@ static void acpi_lid_initialize_state(struct acpi_device *device)
button->lid_state_initialized = true;
}
-static void acpi_button_notify(struct acpi_device *device, u32 event)
+static void acpi_button_notify(acpi_handle handle, u32 event, void *data)
{
- struct acpi_button *button = acpi_driver_data(device);
+ struct acpi_device *device = data;
+ struct acpi_button *button;
struct input_dev *input;
+ button = acpi_driver_data(device);
+
switch (event) {
case ACPI_FIXED_HARDWARE_EVENT:
event = ACPI_BUTTON_NOTIFY_STATUS;
@@ -578,6 +580,11 @@ static int acpi_button_add(struct acpi_device *device)
device_init_wakeup(&device->dev, true);
pr_info("%s [%s]\n", name, acpi_device_bid(device));
+
+ error = acpi_device_install_event_handler(device, ACPI_DEVICE_NOTIFY, acpi_button_notify);
+ if (error)
+ goto err_remove_fs;
+
return 0;
err_remove_fs:
@@ -593,6 +600,7 @@ static void acpi_button_remove(struct acpi_device *device)
{
struct acpi_button *button = acpi_driver_data(device);
+ acpi_device_remove_event_handler(device, ACPI_DEVICE_NOTIFY, acpi_button_notify);
acpi_button_remove_fs(device);
input_unregister_device(button->input);
kfree(button);
--
2.40.1
