linux-kernel - [PATCH 01/14] cpufreq: intel_pstate: Update pid_params.sample_rate_ns in pid_param

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Message-ID: <1870069.9aRhgp95Gh@aspire.rjw.lan>
Date:   Sun, 12 Mar 2017 18:12:56 +0100
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Linux PM <linux-pm@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Subject: [PATCH 01/14] cpufreq: intel_pstate: Update pid_params.sample_rate_ns in pid_param_set()

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

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@...el.com>
---
 drivers/cpufreq/intel_pstate.c |    1 +
 1 file changed, 1 insertion(+)

Index: linux-pm/drivers/cpufreq/intel_pstate.c
===================================================================
--- linux-pm.orig/drivers/cpufreq/intel_pstate.c
+++ linux-pm/drivers/cpufreq/intel_pstate.c
@@ -983,6 +983,7 @@ static void intel_pstate_update_policies
 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;
 }