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@orlives.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@amd.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;
 }
 
-- 
2.34.1

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@orlives.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@amd.com>

Thank you for your patch, I've applied this patch to my review-hans 
branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans

Note it will show up in my review-hans branch once I've pushed my
local branch there, which might take a while.

I will include this patch in my next fixes pull-req to Linus
for the current kernel development cycle.

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;
>  }
>

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@orlives.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@amd.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:

Reviewed-by: Hans de Goede <hdegoede@redhat.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;
>  }
>

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@orlives.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@amd.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@redhat.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;
>>  }
>>  
>

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@orlives.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@amd.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;
>   }
>