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

commit 236761f19a upstream.

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: 5130802ddb ("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>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20201106092243.15574-1-zhuguangqing83@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Zhuguangqing 2020-11-06 17:22:43 +08:00 committed by Greg Kroah-Hartman
parent d3076d054f
commit faa72d97c3
1 changed files with 6 additions and 3 deletions
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9
drivers/thermal/cpu_cooling.c
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@ -320,6 +320,7 @@ static int cpufreq_set_cur_state(struct thermal_cooling_device *cdev,
unsigned long state)
{
struct cpufreq_cooling_device *cpufreq_cdev = cdev->devdata;
int ret;
/* Request state should be less than max_level */
if (WARN_ON(state > cpufreq_cdev->max_level))
@ -329,10 +330,12 @@ static int cpufreq_set_cur_state(struct thermal_cooling_device *cdev,
if (cpufreq_cdev->cpufreq_state == state)
return 0;
cpufreq_cdev->cpufreq_state = state;
ret = freq_qos_update_request(&cpufreq_cdev->qos_req,
cpufreq_cdev->freq_table[state].frequency);
if (ret > 0)
cpufreq_cdev->cpufreq_state = state;
return freq_qos_update_request(&cpufreq_cdev->qos_req,
cpufreq_cdev->freq_table[state].frequency);
return ret;
}
/**