powercap/dtpm_cpu: Reset per_cpu variable in the release function

The release function does not reset the per cpu variable when it is
called. That will prevent creation again as the variable will be
already from the previous creation.

Fix it by resetting them.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20220130210210.549877-2-daniel.lezcano@linaro.org

diff --git a/drivers/powercap/dtpm_cpu.c b/drivers/powercap/dtpm_cpu.c
index eed5ad6..71f45d2 100644 (file)
--- a/drivers/powercap/dtpm_cpu.c
+++ b/drivers/powercap/dtpm_cpu.c
@@ -151,10 +151,17 @@ static int update_pd_power_uw(struct dtpm *dtpm)
 static void pd_release(struct dtpm *dtpm)
 {
        struct dtpm_cpu *dtpm_cpu = to_dtpm_cpu(dtpm);
+       struct cpufreq_policy *policy;
 
        if (freq_qos_request_active(&dtpm_cpu->qos_req))
                freq_qos_remove_request(&dtpm_cpu->qos_req);
 
+       policy = cpufreq_cpu_get(dtpm_cpu->cpu);
+       if (policy) {
+               for_each_cpu(dtpm_cpu->cpu, policy->related_cpus)
+                       per_cpu(dtpm_per_cpu, dtpm_cpu->cpu) = NULL;
+       }
+       
        kfree(dtpm_cpu);
 }