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Subject[PATCH v2] thermal/drivers/cpufreq_cooling: Update cpufreq_state only if state has changed
Date
From: Zhuguangqing <zhuguangqing@xiaomi.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.

Fixes: 5130802ddbb1 ("thermal: cpu_cooling: Switch to QoS requests for freq limits")
Cc: v5.4+ <stable@vger.kernel.org> # v5.4+
Signed-off-by: Zhuguangqing <zhuguangqing@xiaomi.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
---
v2:
- Add Fixes: 5130802ddbb1 in log.
- Add Cc: v5.4+ <stable@vger.kernel.org> # v5.4+ in log.
- Add Acked-by: Viresh Kumar <viresh.kumar@linaro.org> in log.
- Delete an extra blank line.
---
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 cc2959f22f01..612f063c1cfc 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;
--
2.17.1
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