Messages in this thread Patch in this message | | | From | "Rafael J. Wysocki" <> | Subject | [PATCH] cpufreq: Skip all governor-related actions for cpufreq_suspended set | Date | Thu, 07 Apr 2016 03:29:14 +0200 |
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From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Since governor operations are generally skipped if cpufreq_suspended is set, do nothing at all in cpufreq_start_governor() and cpufreq_exit_governor() in that case.
In particular, this prevents fast frequency switching from being disabled after a suspend-to-RAM cycle on all CPUs except for the boot one.
Fixes: b7898fda5bc7 (cpufreq: Support for fast frequency switching) Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> --- drivers/cpufreq/cpufreq.c | 6 ++++++ 1 file changed, 6 insertions(+)
Index: linux-pm/drivers/cpufreq/cpufreq.c =================================================================== --- linux-pm.orig/drivers/cpufreq/cpufreq.c +++ linux-pm/drivers/cpufreq/cpufreq.c @@ -2053,6 +2053,9 @@ static int cpufreq_start_governor(struct { int ret; + if (cpufreq_suspended) + return 0; + if (cpufreq_driver->get && !cpufreq_driver->setpolicy) cpufreq_update_current_freq(policy); @@ -2062,6 +2065,9 @@ static int cpufreq_start_governor(struct static int cpufreq_exit_governor(struct cpufreq_policy *policy) { + if (cpufreq_suspended) + return 0; + cpufreq_disable_fast_switch(policy); return cpufreq_governor(policy, CPUFREQ_GOV_POLICY_EXIT); }
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