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ACPI: video: use .notify method instead of installing handler directly

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This patch adds a .notify() method.  The presence of .notify() causes
Linux/ACPI to manage event handlers and notify handlers on our behalf,
so we don't have to install and remove them ourselves.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
CC: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bjorn Helgaas 2009-04-07 15:37:11 +00:00 committed by Len Brown
parent 342d550db1
commit 7015558fca
1 changed files with 5 additions and 25 deletions
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30
drivers/acpi/video.c
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@ -79,6 +79,7 @@ module_param(brightness_switch_enabled, bool, 0644);
static int acpi_video_bus_add(struct acpi_device *device);
static int acpi_video_bus_remove(struct acpi_device *device, int type);
static int acpi_video_resume(struct acpi_device *device);
static void acpi_video_bus_notify(struct acpi_device *device, u32 event);
static const struct acpi_device_id video_device_ids[] = {
{ACPI_VIDEO_HID, 0},
@ -94,6 +95,7 @@ static struct acpi_driver acpi_video_bus = {
.add = acpi_video_bus_add,
.remove = acpi_video_bus_remove,
.resume = acpi_video_resume,
.notify = acpi_video_bus_notify,
},
};
@ -1986,17 +1988,15 @@ static int acpi_video_bus_stop_devices(struct acpi_video_bus *video)
return acpi_video_bus_DOS(video, 0, 1);
}
static void acpi_video_bus_notify(acpi_handle handle, u32 event, void *data)
static void acpi_video_bus_notify(struct acpi_device *device, u32 event)
{
struct acpi_video_bus *video = data;
struct acpi_device *device = NULL;
struct acpi_video_bus *video = acpi_driver_data(device);
struct input_dev *input;
int keycode;
if (!video)
return;
device = video->device;
input = video->input;
switch (event) {
@ -2127,7 +2127,6 @@ static int acpi_video_resume(struct acpi_device *device)
static int acpi_video_bus_add(struct acpi_device *device)
{
acpi_status status;
struct acpi_video_bus *video;
struct input_dev *input;
int error;
@ -2169,20 +2168,10 @@ static int acpi_video_bus_add(struct acpi_device *device)
acpi_video_bus_get_devices(video, device);
acpi_video_bus_start_devices(video);
status = acpi_install_notify_handler(device->handle,
ACPI_DEVICE_NOTIFY,
acpi_video_bus_notify, video);
if (ACPI_FAILURE(status)) {
printk(KERN_ERR PREFIX
"Error installing notify handler\n");
error = -ENODEV;
goto err_stop_video;
}
video->input = input = input_allocate_device();
if (!input) {
error = -ENOMEM;
goto err_uninstall_notify;
goto err_stop_video;
}
snprintf(video->phys, sizeof(video->phys),
@ -2218,9 +2207,6 @@ static int acpi_video_bus_add(struct acpi_device *device)
err_free_input_dev:
input_free_device(input);
err_uninstall_notify:
acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
acpi_video_bus_notify);
err_stop_video:
acpi_video_bus_stop_devices(video);
acpi_video_bus_put_devices(video);
@ -2235,7 +2221,6 @@ static int acpi_video_bus_add(struct acpi_device *device)
static int acpi_video_bus_remove(struct acpi_device *device, int type)
{
acpi_status status = 0;
struct acpi_video_bus *video = NULL;
@ -2245,11 +2230,6 @@ static int acpi_video_bus_remove(struct acpi_device *device, int type)
video = acpi_driver_data(device);
acpi_video_bus_stop_devices(video);
status = acpi_remove_notify_handler(video->device->handle,
ACPI_DEVICE_NOTIFY,
acpi_video_bus_notify);
acpi_video_bus_put_devices(video);
acpi_video_bus_remove_fs(device);