3.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dirk Brandewie <dirk.j.brande...@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 <petzi...@googlemail.com>
Signed-off-by: Dirk Brandewie <dirk.j.brande...@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Signed-off-by: Greg Kroah-Hartman <gre...@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;
--
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