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

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Date: Sat, 17 Feb 2024 18:58:15 +0100
From: Trolli Schmittlauch <t.schmittlauch@...ives.de>
To: Mario Limonciello <mario.limonciello@....com>, Shyam-sundar.S-k@....com,
 hdegoede@...hat.com
Cc: platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
 Linux regressions mailing list <regressions@...ts.linux.dev>
Subject: Re: [PATCH] platform/x86/amd/pmf: Fix a suspend hang on Framework 13

As the reporter of that issue, I confirm that this fixes suspend and resume for me as well. I've applied the patch on top of 6.8-rc4.
Thanks for getting to the bottom of it so quickly.

On 17.02.24 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>
> ---
>   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;
>   }
>   

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