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| author | Willy Wolff <willy.mh.wolff.ml@gmail.com> | 2020-03-21 10:27:40 +0100 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2020-03-23 15:20:47 +0100 |
| commit | ff44f672d74178b3be19d41a169b98b3e391d4ce (patch) | |
| tree | 656875c793f382a9e7b70b65379203974b6acd57 /drivers/thermal/cpufreq_cooling.c | |
| parent | thermal: imx8mm: Add i.MX8MP support (diff) | |
| download | linux-ff44f672d74178b3be19d41a169b98b3e391d4ce.tar.xz linux-ff44f672d74178b3be19d41a169b98b3e391d4ce.zip | |
thermal/drivers/cpufreq_cooling: Fix return of cpufreq_set_cur_state
When setting the cooling device current state from userspace via sysfs,
the operation fails by returning an -EINVAL.
It appears the recent changes with the per-policy frequency QoS
introduced a regression as reported by:
https://lkml.org/lkml/2020/3/20/599
The function freq_qos_update_request returns 0 or 1 describing update
effectiveness, and a negative error code on failure. However,
cpufreq_set_cur_state returns 0 on success or an error code otherwise.
Consider the QoS update as successful if the function does not return
an error.
Fixes: 3000ce3c52f8b ("cpufreq: Use per-policy frequency QoS")
Signed-off-by: Willy Wolff <willy.mh.wolff.ml@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200321092740.7vvwfxsebcrznydh@macmini.local
Diffstat (limited to 'drivers/thermal/cpufreq_cooling.c')
| -rw-r--r-- | drivers/thermal/cpufreq_cooling.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/thermal/cpufreq_cooling.c b/drivers/thermal/cpufreq_cooling.c index fe83d7a210d4..af55ac08e1bd 100644 --- a/drivers/thermal/cpufreq_cooling.c +++ b/drivers/thermal/cpufreq_cooling.c @@ -431,6 +431,7 @@ 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)) @@ -442,8 +443,9 @@ static int cpufreq_set_cur_state(struct thermal_cooling_device *cdev, cpufreq_cdev->cpufreq_state = state; - return freq_qos_update_request(&cpufreq_cdev->qos_req, - get_state_freq(cpufreq_cdev, state)); + ret = freq_qos_update_request(&cpufreq_cdev->qos_req, + get_state_freq(cpufreq_cdev, state)); + return ret < 0 ? ret : 0; } /* Bind cpufreq callbacks to thermal cooling device ops */ |