From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Date: Sun, 12 Mar 2017 17:12:56 +0000 (+0100)
Subject: cpufreq: intel_pstate: Update pid_params.sample_rate_ns in pid_param_set()
X-Git-Tag: v4.9.54~21
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ffb6a7637ce0b35c7c75574a007333db988ea806;p=platform%2Fkernel%2Flinux-amlogic.git

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


[ 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>
---

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 80fa656da5ab..a59ae8e24d3d 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -609,6 +609,7 @@ static void intel_pstate_hwp_set_online_cpus(void)
 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;
 }