Patch "cpufreq / intel_pstate: Fix max_perf_pct on resume" has been added to the 3.11-stable tree

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This is a note to let you know that I've just added the patch titled

    cpufreq / intel_pstate: Fix max_perf_pct on resume

to the 3.11-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     cpufreq-intel_pstate-fix-max_perf_pct-on-resume.patch
and it can be found in the queue-3.11 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 52e0a509e5d6f902ec26bc2a8bb02b137dc453be Mon Sep 17 00:00:00 2001
From: Dirk Brandewie <dirk.j.brandewie@xxxxxxxxx>
Date: Tue, 15 Oct 2013 11:06:14 -0700
Subject: cpufreq / intel_pstate: Fix max_perf_pct on resume

From: Dirk Brandewie <dirk.j.brandewie@xxxxxxxxx>

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@xxxxxxxxxxxxxx>
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@xxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 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 intel_pstate_cpu_exit(struct
 
 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)
@@ -644,9 +644,8 @@ static int intel_pstate_cpu_init(struct
 	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;


Patches currently in stable-queue which might be from dirk.j.brandewie@xxxxxxxxx are

queue-3.11/cpufreq-intel_pstate-fix-max_perf_pct-on-resume.patch
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