[thermal: thermal/next] thermal/drivers/cpufreq_cooling: Update cpufreq_state only if state has changed

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The following commit has been merged into the thermal/next branch of thermal:

Commit-ID:     236761f19a4f373354f1dcf399b57753f1f4b871
Gitweb:        https://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux.git//236761f19a4f373354f1dcf399b57753f1f4b871
Author:        Zhuguangqing <zhuguangqing@xxxxxxxxxx>
AuthorDate:    Fri, 06 Nov 2020 17:22:43 +08:00
Committer:     Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
CommitterDate: Thu, 12 Nov 2020 12:23:35 +01:00

thermal/drivers/cpufreq_cooling: Update cpufreq_state only if state has changed

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.

Fixes: 5130802ddbb1 ("thermal: cpu_cooling: Switch to QoS requests for freq limits")
Cc: v5.4+ <stable@xxxxxxxxxxxxxxx> # v5.4+
Signed-off-by: Zhuguangqing <zhuguangqing@xxxxxxxxxx>
Acked-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20201106092243.15574-1-zhuguangqing83@xxxxxxxxx
---
 drivers/thermal/cpufreq_cooling.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/thermal/cpufreq_cooling.c b/drivers/thermal/cpufreq_cooling.c
index cc2959f..612f063 100644
--- a/drivers/thermal/cpufreq_cooling.c
+++ b/drivers/thermal/cpufreq_cooling.c
@@ -438,13 +438,11 @@ 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;



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