mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-07-16 14:30:06 -04:00
Code Issues Packages Projects Releases Wiki Activity

Merge branches 'pm-cpuidle' and 'pm-cpufreq'

Browse Source 
* pm-cpuidle:
  cpuidle: Check for dev before deregistering it.
  intel_idle: Fixed C6 state on Avoton/Rangeley processors

* pm-cpufreq:
  cpufreq: fix garbage kobjects on errors during suspend/resume
  cpufreq: suspend governors on system suspend/hibernate
This commit is contained in:
Rafael J. Wysocki
2013-12-06 02:17:59 +01:00
parent dc1ccc4815 813e8e3d6a 2167e2399d
commit 7cdcec991c
5 changed files with 57 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
drivers/cpufreq/cpufreq.c
View File

@@ -26,6 +26,7 @@
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/suspend.h>
#include <linux/syscore_ops.h>
#include <linux/tick.h>
#include <trace/events/power.h>
@@ -47,6 +48,9 @@ static LIST_HEAD(cpufreq_policy_list);
static DEFINE_PER_CPU(char[CPUFREQ_NAME_LEN], cpufreq_cpu_governor);
#endif
/* Flag to suspend/resume CPUFreq governors */
static bool cpufreq_suspended;
static inline bool has_target(void)
{
return cpufreq_driver->target_index || cpufreq_driver->target;
@@ -1462,6 +1466,41 @@ static struct subsys_interface cpufreq_interface = {
.remove_dev = cpufreq_remove_dev,
};
void cpufreq_suspend(void)
{
struct cpufreq_policy *policy;
if (!has_target())
return;
pr_debug("%s: Suspending Governors\n", __func__);
list_for_each_entry(policy, &cpufreq_policy_list, policy_list)
if (__cpufreq_governor(policy, CPUFREQ_GOV_STOP))
pr_err("%s: Failed to stop governor for policy: %p\n",
__func__, policy);
cpufreq_suspended = true;
}
void cpufreq_resume(void)
{
struct cpufreq_policy *policy;
if (!has_target())
return;
pr_debug("%s: Resuming Governors\n", __func__);
cpufreq_suspended = false;
list_for_each_entry(policy, &cpufreq_policy_list, policy_list)
if (__cpufreq_governor(policy, CPUFREQ_GOV_START)
|| __cpufreq_governor(policy, CPUFREQ_GOV_LIMITS))
pr_err("%s: Failed to start governor for policy: %p\n",
__func__, policy);
}
/**
* cpufreq_bp_suspend - Prepare the boot CPU for system suspend.
*
@@ -1764,6 +1803,10 @@ static int __cpufreq_governor(struct cpufreq_policy *policy,
struct cpufreq_governor *gov = NULL;
#endif
/* Don't start any governor operations if we are entering suspend */
if (cpufreq_suspended)
return 0;
if (policy->governor->max_transition_latency &&
policy->cpuinfo.transition_latency >
policy->governor->max_transition_latency) {
@@ -2076,9 +2119,6 @@ static int cpufreq_cpu_callback(struct notifier_block *nfb,
dev = get_cpu_device(cpu);
if (dev) {
if (action & CPU_TASKS_FROZEN)
frozen = true;
switch (action & ~CPU_TASKS_FROZEN) {
case CPU_ONLINE:
__cpufreq_add_dev(dev, NULL, frozen);