Patch "cpufreq: intel_pstate: Update pid_params.sample_rate_ns in pid_param_set()" has been added to the 4.9-stable tree

Patch "cpufreq: intel_pstate: Update pid_params.sample_rate_ns in pid_param_set()" has been added to the 4.9-stable tree

[gregkh]

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

    cpufreq: intel_pstate: Update pid_params.sample_rate_ns in pid_param_set()

to the 4.9-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-update-pid_params.sample_rate_ns-in-pid_param_set.patch
and it can be found in the queue-4.9 subdirectory.

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


>From foo@baz Thu Oct  5 10:28:31 CEST 2017
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Sun, 12 Mar 2017 18:12:56 +0100
Subject: cpufreq: intel_pstate: Update pid_params.sample_rate_ns in pid_param_set()

From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>


[ Upstream commit 6e7408acd04d06c04981c0c0fb5a2462b16fae4f ]

Fix the debugfs interface for PID tuning to actually update
pid_params.sample_rate_ns on PID parameters updates, as changing
pid_params.sample_rate_ms via debugfs has no effect now.

Fixes: a4675fbc4a7a (cpufreq: intel_pstate: Replace timers with utilization update callbacks)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/cpufreq/intel_pstate.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -609,6 +609,7 @@ static void intel_pstate_hwp_set_online_
 static int pid_param_set(void *data, u64 val)
 {
 	*(u32 *)data = val;
+	pid_params.sample_rate_ns = pid_params.sample_rate_ms * NSEC_PER_MSEC;
 	intel_pstate_reset_all_pid();
 	return 0;
 }


Patches currently in stable-queue which might be from rafael.j.wysocki@intel.com are

queue-4.9/cpufreq-intel_pstate-update-pid_params.sample_rate_ns-in-pid_param_set.patch