Revision a81bfdf8bf5396824d7d139560180854cb599b06 authored by Linus Torvalds on 12 February 2021, 19:29:06 UTC, committed by Linus Torvalds on 12 February 2021, 19:29:06 UTC
Pull drm fixes from Dave Airlie: "Regular fixes for final, there is a ttm regression fix, dp-mst fix, one amdgpu revert, two i915 fixes, and some misc fixes for sun4i, xlnx, and vc4. All pretty quiet and don't think we have any known outstanding regressions. ttm: - page pool regression fix. dp_mst: - don't report un-attached ports as connected amdgpu: - blank screen fix i915: - ensure Type-C FIA is powered when initializing - fix overlay frontbuffer tracking sun4i: - tcon1 sync polarity fix - always set HDMI clock rate - fix H6 HDMI PHY config - fix H6 max frequency vc4: - fix buffer overflow xlnx: - fix memory leak" * tag 'drm-fixes-2021-02-12' of git://anongit.freedesktop.org/drm/drm: drm/ttm: make sure pool pages are cleared drm/sun4i: dw-hdmi: Fix max. frequency for H6 drm/sun4i: Fix H6 HDMI PHY configuration drm/sun4i: dw-hdmi: always set clock rate drm/sun4i: tcon: set sync polarity for tcon1 channel drm/i915: Fix overlay frontbuffer tracking Revert "drm/amd/display: Update NV1x SR latency values" drm/i915/tgl+: Make sure TypeC FIA is powered up when initializing it drm/dp_mst: Don't report ports connected if nothing is attached to them drm/xlnx: fix kmemleak by sending vblank_event in atomic_disable drm/vc4: hvs: Fix buffer overflow with the dlist handling
syscore.c
// SPDX-License-Identifier: GPL-2.0
/*
* syscore.c - Execution of system core operations.
*
* Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
*/
#include <linux/syscore_ops.h>
#include <linux/mutex.h>
#include <linux/module.h>
#include <linux/suspend.h>
#include <trace/events/power.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;
trace_suspend_resume(TPS("syscore_suspend"), 0, true);
pm_pr_dbg("Checking wakeup interrupts\n");
/* Return error code if there are any wakeup interrupts pending. */
if (pm_wakeup_pending())
return -EBUSY;
WARN_ONCE(!irqs_disabled(),
"Interrupts enabled before system core suspend.\n");
list_for_each_entry_reverse(ops, &syscore_ops_list, node)
if (ops->suspend) {
pm_pr_dbg("Calling %pS\n", ops->suspend);
ret = ops->suspend();
if (ret)
goto err_out;
WARN_ONCE(!irqs_disabled(),
"Interrupts enabled after %pS\n", ops->suspend);
}
trace_suspend_resume(TPS("syscore_suspend"), 0, false);
return 0;
err_out:
pr_err("PM: System core suspend callback %pS 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;
trace_suspend_resume(TPS("syscore_resume"), 0, true);
WARN_ONCE(!irqs_disabled(),
"Interrupts enabled before system core resume.\n");
list_for_each_entry(ops, &syscore_ops_list, node)
if (ops->resume) {
pm_pr_dbg("Calling %pS\n", ops->resume);
ops->resume();
WARN_ONCE(!irqs_disabled(),
"Interrupts enabled after %pS\n", ops->resume);
}
trace_suspend_resume(TPS("syscore_resume"), 0, false);
}
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 %pS\n", ops->shutdown);
ops->shutdown();
}
mutex_unlock(&syscore_ops_lock);
}
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