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/tiny-power-button.c | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)
diff --git a/drivers/acpi/tiny-power-button.c b/drivers/acpi/tiny-power-button.c
index 598f548b21f3..9c8e8b8cc19f 100644
--- a/drivers/acpi/tiny-power-button.c
+++ b/drivers/acpi/tiny-power-button.c
@@ -19,18 +19,21 @@ static const struct acpi_device_id tiny_power_button_device_ids[] = {
};
MODULE_DEVICE_TABLE(acpi, tiny_power_button_device_ids);
-static int acpi_noop_add(struct acpi_device *device)
+static void acpi_tiny_power_button_notify(acpi_handle handle, u32 event, void *data)
{
- return 0;
+ kill_cad_pid(power_signal, 1);
}
-static void acpi_noop_remove(struct acpi_device *device)
+static int acpi_tiny_power_button_add(struct acpi_device *device)
{
+ return acpi_device_install_event_handler(device, ACPI_DEVICE_NOTIFY,
+ acpi_tiny_power_button_notify);
}
-static void acpi_tiny_power_button_notify(struct acpi_device *device, u32 event)
+static void acpi_tiny_power_button_remove(struct acpi_device *device)
{
- kill_cad_pid(power_signal, 1);
+ acpi_device_remove_event_handler(device, ACPI_DEVICE_NOTIFY,
+ acpi_tiny_power_button_notify);
}
static struct acpi_driver acpi_tiny_power_button_driver = {
@@ -38,9 +41,8 @@ static struct acpi_driver acpi_tiny_power_button_driver = {
.class = "tiny-power-button",
.ids = tiny_power_button_device_ids,
.ops = {
- .add = acpi_noop_add,
- .remove = acpi_noop_remove,
- .notify = acpi_tiny_power_button_notify,
+ .add = acpi_tiny_power_button_add,
+ .remove = acpi_tiny_power_button_remove,
},
};
--
2.40.1
