mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 13:13:57 +08:00
887596224c
Patch 2e711c04db
(PM: Remove sysdev suspend, resume and shutdown operations)
deleted sysdev_suspend(), which was being relied on to call
check_wakeup_irqs() in suspend. If check_wakeup_irqs() is not
called, wake interrupts that are pending when suspend is
entered may be lost. It also breaks IRQCHIP_MASK_ON_SUSPEND,
which is handled in check_wakeup_irqs().
This patch adds a call to check_wakeup_irqs() in syscore_suspend(),
similar to what was deleted in sysdev_suspend().
Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
128 lines
3.0 KiB
C
128 lines
3.0 KiB
C
/*
|
|
* syscore.c - Execution of system core operations.
|
|
*
|
|
* Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
|
|
*
|
|
* This file is released under the GPLv2.
|
|
*/
|
|
|
|
#include <linux/syscore_ops.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/module.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
static LIST_HEAD(syscore_ops_list);
|
|
static DEFINE_MUTEX(syscore_ops_lock);
|
|
|
|
/**
|
|
* register_syscore_ops - Register a set of system core operations.
|
|
* @ops: System core operations to register.
|
|
*/
|
|
void register_syscore_ops(struct syscore_ops *ops)
|
|
{
|
|
mutex_lock(&syscore_ops_lock);
|
|
list_add_tail(&ops->node, &syscore_ops_list);
|
|
mutex_unlock(&syscore_ops_lock);
|
|
}
|
|
EXPORT_SYMBOL_GPL(register_syscore_ops);
|
|
|
|
/**
|
|
* unregister_syscore_ops - Unregister a set of system core operations.
|
|
* @ops: System core operations to unregister.
|
|
*/
|
|
void unregister_syscore_ops(struct syscore_ops *ops)
|
|
{
|
|
mutex_lock(&syscore_ops_lock);
|
|
list_del(&ops->node);
|
|
mutex_unlock(&syscore_ops_lock);
|
|
}
|
|
EXPORT_SYMBOL_GPL(unregister_syscore_ops);
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
/**
|
|
* syscore_suspend - Execute all the registered system core suspend callbacks.
|
|
*
|
|
* This function is executed with one CPU on-line and disabled interrupts.
|
|
*/
|
|
int syscore_suspend(void)
|
|
{
|
|
struct syscore_ops *ops;
|
|
int ret = 0;
|
|
|
|
pr_debug("Checking wakeup interrupts\n");
|
|
|
|
/* Return error code if there are any wakeup interrupts pending. */
|
|
ret = check_wakeup_irqs();
|
|
if (ret)
|
|
return ret;
|
|
|
|
WARN_ONCE(!irqs_disabled(),
|
|
"Interrupts enabled before system core suspend.\n");
|
|
|
|
list_for_each_entry_reverse(ops, &syscore_ops_list, node)
|
|
if (ops->suspend) {
|
|
if (initcall_debug)
|
|
pr_info("PM: Calling %pF\n", ops->suspend);
|
|
ret = ops->suspend();
|
|
if (ret)
|
|
goto err_out;
|
|
WARN_ONCE(!irqs_disabled(),
|
|
"Interrupts enabled after %pF\n", ops->suspend);
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_out:
|
|
pr_err("PM: System core suspend callback %pF failed.\n", ops->suspend);
|
|
|
|
list_for_each_entry_continue(ops, &syscore_ops_list, node)
|
|
if (ops->resume)
|
|
ops->resume();
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(syscore_suspend);
|
|
|
|
/**
|
|
* syscore_resume - Execute all the registered system core resume callbacks.
|
|
*
|
|
* This function is executed with one CPU on-line and disabled interrupts.
|
|
*/
|
|
void syscore_resume(void)
|
|
{
|
|
struct syscore_ops *ops;
|
|
|
|
WARN_ONCE(!irqs_disabled(),
|
|
"Interrupts enabled before system core resume.\n");
|
|
|
|
list_for_each_entry(ops, &syscore_ops_list, node)
|
|
if (ops->resume) {
|
|
if (initcall_debug)
|
|
pr_info("PM: Calling %pF\n", ops->resume);
|
|
ops->resume();
|
|
WARN_ONCE(!irqs_disabled(),
|
|
"Interrupts enabled after %pF\n", ops->resume);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(syscore_resume);
|
|
#endif /* CONFIG_PM_SLEEP */
|
|
|
|
/**
|
|
* syscore_shutdown - Execute all the registered system core shutdown callbacks.
|
|
*/
|
|
void syscore_shutdown(void)
|
|
{
|
|
struct syscore_ops *ops;
|
|
|
|
mutex_lock(&syscore_ops_lock);
|
|
|
|
list_for_each_entry_reverse(ops, &syscore_ops_list, node)
|
|
if (ops->shutdown) {
|
|
if (initcall_debug)
|
|
pr_info("PM: Calling %pF\n", ops->shutdown);
|
|
ops->shutdown();
|
|
}
|
|
|
|
mutex_unlock(&syscore_ops_lock);
|
|
}
|