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cpufreq / intel_pstate: Fix max_perf_pct on resume 

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>
Cc: 3.9+ <stable@vger.kernel.org> # 3.9+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Dirk Brandewie 2013-10-15 11:06:14 -07:00 committed by Rafael J. Wysocki
parent 35f9162d67
commit 52e0a509e5
1 changed files with 3 additions and 4 deletions
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7
drivers/cpufreq/intel_pstate.c
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@ -637,8 +637,8 @@ static int intel_pstate_cpu_exit(struct cpufreq_policy *policy)
static int 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)
@ -652,9 +652,8 @@ static int intel_pstate_cpu_init(struct cpufreq_policy *policy)
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;