Re: [PATCH 1/3] ARM: dts: meson: Fix the UART compatible strings

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[CCing the stable list as well as Greg and Sasha so they can correct me
if I write something stupid]

On 06.04.23 10:27, Ricardo Cañuelo wrote:
> 
> On 5/4/23 19:14, Thorsten Leemhuis wrote:
>> Wait, what? A patch (5225e1b87432 ("ARM: dts: meson: Fix the UART
>> compatible strings")) that was merged for v5.17-rc4 and is not in the
>> list of patches that were in 4.14.312-rc1
>> (https://lore.kernel.org/all/20230403140351.636471867@xxxxxxxxxxxxxxxxxxx/
>> ) is meant to suddenly cause this? How is this possible? Am I totally on
>> the wrong track here and misunderstanding something, or is this a
>> bisection that went horribly sideways?
> 
> I didn't say this was introduced in 4.14.312-rc1, this has been failing
> for a long time and it was merged for 4.14.267:
> https://lwn.net/Articles/884977/
> 
> Sorry I wasn't clear before.

Ahh, no worries and thx for this. But well, in that case let me get back
to something from your report:

>>> KernelCI detected that this patch introduced a regression in
>>> stable-rc/linux-4.14.y on a meson8b-odroidc1.
>>> After this patch was applied the tests running on this platform don't
>>> show any serial output.
>>> 
>>> This doesn't happen in other stable branches nor in mainline, but 4.14
>>> hasn't still reached EOL and it'd be good to find a fix.

Well, the stable maintainers may correct me if I'm wrong, but as far as
I know in that case it's the duty of the stable team (which was not even
CCed on the report afaics) to look into this for two reasons:

* the regression does not happened in mainline (and maybe never has)

* mainline developers never signed up for maintaining their work in
longterm kernels; quite a few nevertheless help in situation like this,
at least for recent series and if they asked for a backport through a
"CC: <stable@" tag – but the latter doesn't seem to be the case here
(not totally sure, but it looks like AUTOSEL picked this up) and it's a
quite old series.

>>> #regzbot introduced: 5225e1b87432dcf0d0fc3440824b91d04c1d6cc1

Thx for getting regzbot involved, but due to your usage it now considers
this a mainline regression, as 5225e1b87432 is a mainline commit. As
this only happens in a particular stable tree, it should use a commit id
from there instead:

#regzbot introduced: 23dfa42a0a2a91d640ef3fce585194b970d8680c

(above line will make regzbot adjust this)

Ciao, Thorsten



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