Re: [regression] Bug 217114 - Tiger Lake SATA Controller not operating correctly [bisected]

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On 3/3/23 16:30, Thorsten Leemhuis wrote:
> On 03.03.23 08:10, Linux regression tracking (Thorsten Leemhuis) wrote:
>> Hi, this is your Linux kernel regression tracker.
>>
>> I noticed a regression report in bugzilla.kernel.org that apparently
>> affects 6.2 and later as well as 6.1.13 and later, as it was already
>> backported there.
>>
>> As many (most?) kernel developer don't keep an eye on bugzilla, I
>> decided to forward the report by mail. Quoting from
>> https://bugzilla.kernel.org/show_bug.cgi?id=217114 :
>>
>>>  emmi@xxxxxxxxxxx 2023-03-02 11:25:00 UTC
>>>
>>> As per kernel problem found in https://bbs.archlinux.org/viewtopic.php?id=283906 ,
>>>
>>> Commit 104ff59af73aba524e57ae0fef70121643ff270e
>>
>> [FWIW: That's "ata: ahci: Add Tiger Lake UP{3,4} AHCI controller" from
>> Simon Gaiser]
> 
> BTW, there is one thing I wondered after sending above mail: was it
> really wise to merge this to mainline two days before 6.2 was released?
> Yes, the change subject's makes it sounds like this is a hardware
> enablement, but the `Mark the Tiger Lake UP{3,4} AHCI controller as
> "low_power"` at the beginning of the change description shines a
> different light on it.

Yes, I made the decision to send this patch as a "fix" rather than a change, and
that was rc8. In retrospect, maybe not the best decision. But the patch was
fixing issues for Simon, so...

Anyway, will follow this. I requested more information on Bugzilla. The issue
here is that it may be due to the device having a bad LPM support (there are
many) rather than the controller itself. Need to sort this out.



-- 
Damien Le Moal
Western Digital Research




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