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Message-ID: <a0ecb036-c760-447a-abfb-78fb7928fb9c@amd.com>
Date: Thu, 16 May 2024 02:47:05 -0500
From: "Limonciello, Mario" <mario.limonciello@....com>
To: zhida312@...look.com, rafael@...nel.org, viresh.kumar@...aro.org
Cc: Peng Ma <andypma@...cent.com>, Huang Rui <ray.huang@....com>,
"Gautham R. Shenoy" <gautham.shenoy@....com>, Perry Yuan
<perry.yuan@....com>, linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] cpufreq: amd-pstate: fix the memory to free after epp
exist
On 5/16/2024 1:30 AM, zhida312@...look.com wrote:
> From: andypma <andypma.tencent.com>
>
> the cpudata memory from kzmalloc in epp init function is
> not free after epp exist, so we should free it.
>
> Signed-off-by: Peng Ma <andypma@...cent.com>
>
> Changes from v3 to v4:
> update subject used git command "git format-patch -1 -v x"
>
> Changes from v2 to v3:
> update Signed-off-by to Peng Ma <andypma@...cent.com>.
> set a space between if and "(".
>
> Changes from v1 to v2:
> check whether it is empty before releasing
> set driver_data is NULL after free
> ---
Thanks for your submission!
I would prefer the change list below the cut list, but otherwise this is
fine. Maybe Rafael can modify that while committing.
Acked-by: Mario Limonciello <mario.limonciello@....com>
> drivers/cpufreq/amd-pstate.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
> index 6a342b0c0140..1b7e82a0ad2e 100644
> --- a/drivers/cpufreq/amd-pstate.c
> +++ b/drivers/cpufreq/amd-pstate.c
> @@ -1441,6 +1441,13 @@ static int amd_pstate_epp_cpu_init(struct cpufreq_policy *policy)
>
> static int amd_pstate_epp_cpu_exit(struct cpufreq_policy *policy)
> {
> + struct amd_cpudata *cpudata = policy->driver_data;
> +
> + if (cpudata) {
> + kfree(cpudata);
> + policy->driver_data = NULL;
> + }
> +
> pr_debug("CPU %d exiting\n", policy->cpu);
> return 0;
> }
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