Revision 2f53d15cf95824ed320abed3c33759b8b21aca15 authored by Xianting Tian on 30 June 2021, 14:33:36 UTC, committed by Damien Le Moal on 16 July 2021, 04:45:18 UTC
bio_alloc() with __GFP_DIRECT_RECLAIM, which is included in GFP_NOFS, never fails, see comments in bio_alloc_bioset(). Signed-off-by: Xianting Tian <xianting.tian@linux.alibaba.com> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
1 parent e73f0f0
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);
MODULE_AUTHOR("Huang Ying");
MODULE_DESCRIPTION("ACPI Hardware Error Device Driver");
MODULE_LICENSE("GPL");
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