powercap/dtpm_cpu: Reset per_cpu variable in the release function

[ Upstream commit 0aea2e4ec2a2bfa2d7e8820e37ba5b5ce04f20a5 ]

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
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/powercap/dtpm_cpu.c b/drivers/powercap/dtpm_cpu.c
index b740866b228d972e4f2e0bb7054359044f73d7cd..1e8cac699646caa75b873a465077f38b64363219 100644 (file)
--- a/drivers/powercap/dtpm_cpu.c
+++ b/drivers/powercap/dtpm_cpu.c
@@ -150,10 +150,17 @@ 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);
 }