[Regression] CPU stalls and eventually causes a complete system freeze with 6.0.3 due to "video/aperture: Disable and unregister sysfb devices via aperture helpers"

[Thomas Zimmermann]

Hi

Am 24.10.22 um 13:27 schrieb Greg KH:
> On Mon, Oct 24, 2022 at 12:41:43PM +0200, Thorsten Leemhuis wrote:
>> Hi! Thx for the reply.
>>
>> On 24.10.22 12:26, Thomas Zimmermann wrote:
>>> Am 23.10.22 um 10:04 schrieb Thorsten Leemhuis:
>>>>
>>>> I noticed a regression report in bugzilla.kernel.org. As many (most?)
>>>> kernel developer don't keep an eye on it, I decided to forward it by
>>>> mail. Quoting from https://bugzilla.kernel.org/show_bug.cgi?id=216616  :
>>>>
>>>>>    Andreas 2022-10-22 14:25:32 UTC
>>>>>
>>>>> Created attachment 303074 [details]
>>>>> dmesg
>>>
>>> I've looked at the kernel log and found that simpledrm has been loaded
>>> *after* amdgpu, which should never happen. The problematic patch has
>>> been taken from a long list of refactoring work on this code. No wonder
>>> that it doesn't work as expected.
>>>
>>> Please cherry-pick commit 9d69ef183815 ("fbdev/core: Remove
>>> remove_conflicting_pci_framebuffers()") into the 6.0 stable branch and
>>> report on the results. It should fix the problem.
>>
>> Greg, is that enough for you to pick this up? Or do you want Andreas to
>> test first if it really fixes the reported problem?
> 
> This should be good enough.  If this does NOT fix the issue, please let
> me know.

Thanks a lot. I think I can provided a dedicated fix if the proposed 
commit doesn't work.

Best regards
Thomas

> 
> thanks,
> 
> greg k-h

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev
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