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 80fa656da5ab43e4e7013351c6828fe3e9748f84..a59ae8e24d3d80616d4c33fa91bc48cd426bfbb8 100644 (file)
--- 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;
 }