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cpufreq: fix cpufreq suspend/resume for intel_pstate 

Cpufreq core introduces cpufreq_suspended flag to let cpufreq sysfs nodes
across S2RAM/S2DISK. But the flag is only set in the cpufreq_suspend()
for cpufreq drivers which have target or target_index callback. This
skips intel_pstate driver. This patch is to set the flag before checking
target or target_index callback.

Fixes: 2f0aea9363 (cpufreq: suspend governors on system suspend/hibernate)
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Cc: 3.15+ <stable@vger.kernel.org> # 3.15+
[rjw: Subject]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Lan Tianyu 2014-09-18 15:03:07 +08:00 committed by Rafael J. Wysocki
parent 0f33be009b
commit 8e30444e15
1 changed files with 4 additions and 4 deletions
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8
drivers/cpufreq/cpufreq.c
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@ -1656,6 +1656,8 @@ void cpufreq_suspend(void)
if (!cpufreq_driver)
return;
cpufreq_suspended = true;
if (!has_target())
return;
@ -1670,8 +1672,6 @@ void cpufreq_suspend(void)
pr_err("%s: Failed to suspend driver: %p\n", __func__,
policy);
}
cpufreq_suspended = true;
}
/**
@ -1687,13 +1687,13 @@ void cpufreq_resume(void)
if (!cpufreq_driver)
return;
cpufreq_suspended = false;
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_driver->resume && cpufreq_driver->resume(policy))
pr_err("%s: Failed to resume driver: %p\n", __func__,