Re: [PATCH] cpufreq: amd-pstate: fix the memory to free after epp exist

[mazhida]

Hi Perry,

	Yes，Of course.

BR,
Peng

> 2024年5月14日 12:51，Yuan, Perry <Perry.Yuan@xxxxxxx> 写道：
> 
> [AMD Official Use Only - AMD Internal Distribution Only]
> 
> Hi Peng,
> 
>> -----Original Message-----
>> From: zhida312@xxxxxxxxxxx <zhida312@xxxxxxxxxxx>
>> Sent: Tuesday, May 14, 2024 11:17 AM
>> To: rafael@xxxxxxxxxx; viresh.kumar@xxxxxxxxxx
>> Cc: Peng Ma <andypma@xxxxxxxxxxx>; Huang, Ray <Ray.Huang@xxxxxxx>;
>> Shenoy, Gautham Ranjal <gautham.shenoy@xxxxxxx>; Limonciello, Mario
>> <Mario.Limonciello@xxxxxxx>; Yuan, Perry <Perry.Yuan@xxxxxxx>; linux-
>> pm@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
>> Subject: [PATCH] cpufreq: amd-pstate: fix the memory to free after epp exist
>> 
>> 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@xxxxxxxxxxx>
>> ---
>> drivers/cpufreq/amd-pstate.c | 3 +++
>> 1 file changed, 3 insertions(+)
>> 
>> diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index
>> 2db095867d03..96a323f59a93 100644
>> --- a/drivers/cpufreq/amd-pstate.c
>> +++ b/drivers/cpufreq/amd-pstate.c
>> @@ -1425,6 +1425,9 @@ 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;
>> +
>> +     kfree(cpudata);
>>   pr_debug("CPU %d exiting\n", policy->cpu);
>>   return 0;
>> }
>> --
>> 2.33.0
> 
> Thanks for the patch, how about change to be like below?
> 
> if (cpudata) {
>     kfree(cpudata);
>     policy->driver_data = NULL;
> }
> 
> Perry.
>