linux-kernel - Re: [PATCH] platform/x86/amd/pmf: Fix a suspend hang on Framework 13

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Date: Mon, 19 Feb 2024 09:53:30 +0530
From: Shyam Sundar S K <Shyam-sundar.S-k@....com>
To: Hans de Goede <hdegoede@...hat.com>,
 Mario Limonciello <mario.limonciello@....com>
Cc: platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
 Linux regressions mailing list <regressions@...ts.linux.dev>,
 Trolli Schmittlauch <t.schmittlauch@...ives.de>
Subject: Re: [PATCH] platform/x86/amd/pmf: Fix a suspend hang on Framework 13

Hi Mario,

This was super quick! Thank you for the help. Seems like lot of action
happened over the weekend :-)

Hi Hans,


On 2/18/2024 15:56, Hans de Goede wrote:
> Hi,
> 
> On 2/17/24 01:52, Mario Limonciello wrote:
>> The buffer is cleared in the suspend handler but used in
>> the delayed work for amd_pmf_get_metrics().
>>
>> Stop clearing it to fix the hang.
>>
>> Reported-by: Trolli Schmittlauch <t.schmittlauch@...ives.de>
>> Closes: https://lore.kernel.org/regressions/ed2226ff-257b-4cfd-afd6-bf3be9785474@localhost/
>> Closes: https://community.frame.work/t/kernel-6-8-rc-system-freezes-after-resuming-from-suspend-reproducers-wanted/45381
>> Fixes: 2b3a7f06caaf ("platform/x86/amd/pmf: Change return type of amd_pmf_set_dram_addr()")
>> Signed-off-by: Mario Limonciello <mario.limonciello@....com>
> 
> Ugh, I should have caught this during review. I especially asked
> for the alloc parameter to amd_pmf_set_dram_addr() to be added
> for this. Ah well ...
> 
> Thanks, patch looks good to me:

Thank you for the support!

Thanks,
Shyam

> 
> Reviewed-by: Hans de Goede <hdegoede@...hat.com>
> 
> Regards,
> 
> Hans
> 
> 
> 
>> ---
>>  drivers/platform/x86/amd/pmf/core.c | 2 --
>>  1 file changed, 2 deletions(-)
>>
>> diff --git a/drivers/platform/x86/amd/pmf/core.c b/drivers/platform/x86/amd/pmf/core.c
>> index 853158933510..4f734e049f4a 100644
>> --- a/drivers/platform/x86/amd/pmf/core.c
>> +++ b/drivers/platform/x86/amd/pmf/core.c
>> @@ -299,8 +299,6 @@ static int amd_pmf_suspend_handler(struct device *dev)
>>  	if (pdev->smart_pc_enabled)
>>  		cancel_delayed_work_sync(&pdev->pb_work);
>>  
>> -	kfree(pdev->buf);
>> -
>>  	return 0;
>>  }
>>  
>