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

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 15:37:06 +00:00 committed by Len Brown
parent 8e2c4f2844
commit 342d550db1
1 changed files with 4 additions and 23 deletions
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27
drivers/acpi/thermal.c
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@ -98,6 +98,7 @@ MODULE_PARM_DESC(psv, "Disable or override all passive trip points.");
static int acpi_thermal_add(struct acpi_device *device);
static int acpi_thermal_remove(struct acpi_device *device, int type);
static int acpi_thermal_resume(struct acpi_device *device);
static void acpi_thermal_notify(struct acpi_device *device, u32 event);
static int acpi_thermal_state_open_fs(struct inode *inode, struct file *file);
static int acpi_thermal_temp_open_fs(struct inode *inode, struct file *file);
static int acpi_thermal_trip_open_fs(struct inode *inode, struct file *file);
@ -123,6 +124,7 @@ static struct acpi_driver acpi_thermal_driver = {
.add = acpi_thermal_add,
.remove = acpi_thermal_remove,
.resume = acpi_thermal_resume,
.notify = acpi_thermal_notify,
},
};
@ -1264,17 +1266,14 @@ static int acpi_thermal_remove_fs(struct acpi_device *device)
Driver Interface
-------------------------------------------------------------------------- */
static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data)
static void acpi_thermal_notify(struct acpi_device *device, u32 event)
{
struct acpi_thermal *tz = data;
struct acpi_device *device = NULL;
struct acpi_thermal *tz = acpi_driver_data(device);
if (!tz)
return;
device = tz->device;
switch (event) {
case ACPI_THERMAL_NOTIFY_TEMPERATURE:
acpi_thermal_check(tz);
@ -1298,8 +1297,6 @@ static void acpi_thermal_notify(acpi_handle handle, u32 event, void *data)
"Unsupported event [0x%x]\n", event));
break;
}
return;
}
static int acpi_thermal_get_info(struct acpi_thermal *tz)
@ -1337,7 +1334,6 @@ static int acpi_thermal_get_info(struct acpi_thermal *tz)
static int acpi_thermal_add(struct acpi_device *device)
{
int result = 0;
acpi_status status = AE_OK;
struct acpi_thermal *tz = NULL;
@ -1368,21 +1364,11 @@ static int acpi_thermal_add(struct acpi_device *device)
if (result)
goto unregister_thermal_zone;
status = acpi_install_notify_handler(device->handle,
ACPI_DEVICE_NOTIFY,
acpi_thermal_notify, tz);
if (ACPI_FAILURE(status)) {
result = -ENODEV;
goto remove_fs;
}
printk(KERN_INFO PREFIX "%s [%s] (%ld C)\n",
acpi_device_name(device), acpi_device_bid(device),
KELVIN_TO_CELSIUS(tz->temperature));
goto end;
remove_fs:
acpi_thermal_remove_fs(device);
unregister_thermal_zone:
thermal_zone_device_unregister(tz->thermal_zone);
free_memory:
@ -1393,7 +1379,6 @@ end:
static int acpi_thermal_remove(struct acpi_device *device, int type)
{
acpi_status status = AE_OK;
struct acpi_thermal *tz = NULL;
if (!device || !acpi_driver_data(device))
@ -1401,10 +1386,6 @@ static int acpi_thermal_remove(struct acpi_device *device, int type)
tz = acpi_driver_data(device);
status = acpi_remove_notify_handler(device->handle,
ACPI_DEVICE_NOTIFY,
acpi_thermal_notify);
acpi_thermal_remove_fs(device);
acpi_thermal_unregister_thermal_zone(tz);
mutex_destroy(&tz->lock);