mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-21 10:01:00 +00:00
898ff0f005
Modify the ACPI HED driver to install its own Notify() handler directly instead of providing an ACPI driver .notify() callback. This will allow the ACPI driver .notify() callback to be eliminated and it will allow the HED driver to be switched over to a platform one in the future. Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Michal Wilczynski <michal.wilczynski@intel.com> [ rjw: Subject and changelog edits, whitespace adjustments ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
87 lines
2.1 KiB
C
87 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* ACPI Hardware Error Device (PNP0C33) Driver
|
|
*
|
|
* Copyright (C) 2010, Intel Corp.
|
|
* Author: Huang Ying <ying.huang@intel.com>
|
|
*
|
|
* ACPI Hardware Error Device is used to report some hardware errors
|
|
* notified via SCI, mainly the corrected errors.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/acpi.h>
|
|
#include <acpi/hed.h>
|
|
|
|
static const struct acpi_device_id acpi_hed_ids[] = {
|
|
{"PNP0C33", 0},
|
|
{"", 0},
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, acpi_hed_ids);
|
|
|
|
static acpi_handle hed_handle;
|
|
|
|
static BLOCKING_NOTIFIER_HEAD(acpi_hed_notify_list);
|
|
|
|
int register_acpi_hed_notifier(struct notifier_block *nb)
|
|
{
|
|
return blocking_notifier_chain_register(&acpi_hed_notify_list, nb);
|
|
}
|
|
EXPORT_SYMBOL_GPL(register_acpi_hed_notifier);
|
|
|
|
void unregister_acpi_hed_notifier(struct notifier_block *nb)
|
|
{
|
|
blocking_notifier_chain_unregister(&acpi_hed_notify_list, nb);
|
|
}
|
|
EXPORT_SYMBOL_GPL(unregister_acpi_hed_notifier);
|
|
|
|
/*
|
|
* SCI to report hardware error is forwarded to the listeners of HED,
|
|
* it is used by HEST Generic Hardware Error Source with notify type
|
|
* SCI.
|
|
*/
|
|
static void acpi_hed_notify(acpi_handle handle, u32 event, void *data)
|
|
{
|
|
blocking_notifier_call_chain(&acpi_hed_notify_list, 0, NULL);
|
|
}
|
|
|
|
static int acpi_hed_add(struct acpi_device *device)
|
|
{
|
|
int err;
|
|
|
|
/* Only one hardware error device */
|
|
if (hed_handle)
|
|
return -EINVAL;
|
|
hed_handle = device->handle;
|
|
|
|
err = acpi_dev_install_notify_handler(device, ACPI_DEVICE_NOTIFY,
|
|
acpi_hed_notify);
|
|
if (err)
|
|
hed_handle = NULL;
|
|
|
|
return err;
|
|
}
|
|
|
|
static void acpi_hed_remove(struct acpi_device *device)
|
|
{
|
|
acpi_dev_remove_notify_handler(device, ACPI_DEVICE_NOTIFY,
|
|
acpi_hed_notify);
|
|
hed_handle = NULL;
|
|
}
|
|
|
|
static struct acpi_driver acpi_hed_driver = {
|
|
.name = "hardware_error_device",
|
|
.class = "hardware_error",
|
|
.ids = acpi_hed_ids,
|
|
.ops = {
|
|
.add = acpi_hed_add,
|
|
.remove = acpi_hed_remove,
|
|
},
|
|
};
|
|
module_acpi_driver(acpi_hed_driver);
|
|
|
|
MODULE_AUTHOR("Huang Ying");
|
|
MODULE_DESCRIPTION("ACPI Hardware Error Device Driver");
|
|
MODULE_LICENSE("GPL");
|