diff mbox series

[v1,2/7] powercap/dtpm_cpu: Reset per_cpu variable in the release function

Message ID 20220130210210.549877-2-daniel.lezcano@linaro.org
State Accepted
Commit 0aea2e4ec2a2bfa2d7e8820e37ba5b5ce04f20a5
Headers show
Series [v1,1/7] powercap/dtpm: Change locking scheme | expand

Commit Message

Daniel Lezcano Jan. 30, 2022, 9:02 p.m. UTC 
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>
---
 drivers/powercap/dtpm_cpu.c | 7 +++++++
 1 file changed, 7 insertions(+)

Comments

Ulf Hansson Feb. 16, 2022, 4:24 p.m. UTC | #1 
On Sun, 30 Jan 2022 at 22:02, Daniel Lezcano <daniel.lezcano@linaro.org> wrote:
>
> 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>

Kind regards
Uffe


> ---
>  drivers/powercap/dtpm_cpu.c | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/drivers/powercap/dtpm_cpu.c b/drivers/powercap/dtpm_cpu.c
> index eed5ad688d46..71f45d2f5a60 100644
> --- 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);
>  }
>
> --
> 2.25.1
>
diff mbox series

Patch

diff --git a/drivers/powercap/dtpm_cpu.c b/drivers/powercap/dtpm_cpu.c
index eed5ad688d46..71f45d2f5a60 100644
--- 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);
 }