https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 authored by Linus Torvalds on 31 May 2020, 23:49:15 UTC
Linux 5.7
Linux 5.7
Tip revision: 3d77e6a
hed.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(struct acpi_device *device, u32 event)
{
blocking_notifier_call_chain(&acpi_hed_notify_list, 0, NULL);
}
static int acpi_hed_add(struct acpi_device *device)
{
/* Only one hardware error device */
if (hed_handle)
return -EINVAL;
hed_handle = device->handle;
return 0;
}
static int acpi_hed_remove(struct acpi_device *device)
{
hed_handle = NULL;
return 0;
}
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,
.notify = acpi_hed_notify,
},
};
module_acpi_driver(acpi_hed_driver);
ACPI_MODULE_NAME("hed");
MODULE_AUTHOR("Huang Ying");
MODULE_DESCRIPTION("ACPI Hardware Error Device Driver");
MODULE_LICENSE("GPL");