| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.10 07/74] cpufreq / intel_pstate: Fix max_perf_pct on resume | Date | Fri, 8 Nov 2013 22:51:12 -0800 |
| |
3.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dirk Brandewie <dirk.j.brandewie@intel.com>
commit 52e0a509e5d6f902ec26bc2a8bb02b137dc453be upstream.
If the system is suspended while max_perf_pct is less than 100 percent or no_turbo set policy->{min,max} will be set incorrectly with scaled values which turn the scaled values into hard limits.
References: https://bugzilla.kernel.org/show_bug.cgi?id=61241 Reported-by: Patrick Bartels <petzicus@googlemail.com> Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/cpufreq/intel_pstate.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)
--- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -629,8 +629,8 @@ static int __cpuinit intel_pstate_cpu_ex static int __cpuinit intel_pstate_cpu_init(struct cpufreq_policy *policy) { - int rc, min_pstate, max_pstate; struct cpudata *cpu; + int rc; rc = intel_pstate_init_cpu(policy->cpu); if (rc) @@ -644,9 +644,8 @@ static int __cpuinit intel_pstate_cpu_in else policy->policy = CPUFREQ_POLICY_POWERSAVE; - intel_pstate_get_min_max(cpu, &min_pstate, &max_pstate); - policy->min = min_pstate * 100000; - policy->max = max_pstate * 100000; + policy->min = cpu->pstate.min_pstate * 100000; + policy->max = cpu->pstate.turbo_pstate * 100000; /* cpuinfo and default policy values */ policy->cpuinfo.min_freq = cpu->pstate.min_pstate * 100000;
|