linux-kernel - [PATCH] thermal/drivers/cpufreq_cooling: Update cpufreq

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Date:   Thu,  5 Nov 2020 19:19:14 +0800
From:   zhuguangqing83@...il.com
To:     amit.kachhap@...il.com, daniel.lezcano@...aro.org,
        viresh.kumar@...aro.org, javi.merino@...nel.org,
        rui.zhang@...el.com, amitk@...nel.org
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        zhuguangqing <zhuguangqing@...omi.com>
Subject: [PATCH] thermal/drivers/cpufreq_cooling: Update cpufreq_state only if state has changed

From: zhuguangqing <zhuguangqing@...omi.com>

If state has not changed successfully and we updated cpufreq_state,
next time when the new state is equal to cpufreq_state (not changed
successfully last time), we will return directly and miss a
freq_qos_update_request() that should have been.

Signed-off-by: zhuguangqing <zhuguangqing@...omi.com>
---
 drivers/thermal/cpufreq_cooling.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/thermal/cpufreq_cooling.c b/drivers/thermal/cpufreq_cooling.c
index cc2959f22f01..00dc26c33899 100644
--- a/drivers/thermal/cpufreq_cooling.c
+++ b/drivers/thermal/cpufreq_cooling.c
@@ -438,13 +438,12 @@ static int cpufreq_set_cur_state(struct thermal_cooling_device *cdev,
 	if (cpufreq_cdev->cpufreq_state == state)
 		return 0;
 
-	cpufreq_cdev->cpufreq_state = state;
-
 	frequency = get_state_freq(cpufreq_cdev, state);
 
 	ret = freq_qos_update_request(&cpufreq_cdev->qos_req, frequency);
 
 	if (ret > 0) {
+		cpufreq_cdev->cpufreq_state = state;
 		cpus = cpufreq_cdev->policy->cpus;
 		max_capacity = arch_scale_cpu_capacity(cpumask_first(cpus));
 		capacity = frequency * max_capacity;
-- 
2.17.1