linux-kernel - Re: [PATCH v3 00/16] ipmi: Allow raw access to KCS devices

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Date:   Thu, 20 May 2021 16:21:31 +0930
From:   "Andrew Jeffery" <andrew@...id.au>
To:     openipmi-developer@...ts.sourceforge.net, openbmc@...ts.ozlabs.org,
        "Corey Minyard" <minyard@....org>
Cc:     devicetree@...r.kernel.org, "Tomer Maimon" <tmaimon77@...il.com>,
        linux-aspeed@...ts.ozlabs.org,
        "Avi Fishman" <avifishman70@...il.com>,
        "Patrick Venture" <venture@...gle.com>,
        linux-kernel@...r.kernel.org, "Tali Perry" <tali.perry1@...il.com>,
        "Rob Herring" <robh+dt@...nel.org>,
        "Chia-Wei, Wang" <chiawei_wang@...eedtech.com>,
        linux-arm-kernel@...ts.infradead.org,
        "Benjamin Fair" <benjaminfair@...gle.com>,
        "Arnd Bergmann" <arnd@...db.de>, "Zev Weiss" <zweiss@...inix.com>
Subject: Re: [PATCH v3 00/16] ipmi: Allow raw access to KCS devices

Hi Corey,

On Mon, 10 May 2021, at 15:11, Andrew Jeffery wrote:
> Hello,
> 
> This is the 3rd spin of the series refactoring the keyboard-controller-style
> device drivers in the IPMI subsystem.
> 
> v2 can be found (in two parts because yay patch workflow mistakes) at:
> 
> Cover letter:
> https://lore.kernel.org/linux-arm-kernel/20210319061952.145040-1-andrew@aj.id.au/
> 
> Patches:
> https://lore.kernel.org/linux-arm-kernel/20210319062752.145730-1-andrew@aj.id.au/
> 
> Several significant changes in v3:
> 
> 1. The series is rebased onto v5.13-rc1
> 
> 2. v5.13-rc1 includes Chiawei's patches reworking the LPC devicetree bindings,
>    so they're no-longer required in the series.
> 
> 3. After some discussion with Arnd[1] and investigating the serio subsystem,
>    I've replaced the "raw" KCS driver (patch 16/21 in v2) with a serio adaptor
>    (patch 11/16 in this series). The adaptor allows us to take advantage of the
>    existing chardevs provided by serio.
> 
> [1] 
> https://lore.kernel.org/linux-arm-kernel/37e75b07-a5c6-422f-84b3-54f2bea0b917@www.fastmail.com/
> 
> Finally, I've also addressed Zev Weiss' review comments where I thought it was
> required. These comments covered a lot of minor issues across (almost) all the
> patches, so it's best to review from a clean slate rather than attempt to review
> the differences between spins.

I backported this series for OpenBMC and posting those patches provoked
some feedback:

* A bug identified in patch 9/18 for the Nuvoton driver where we enable
  the OBE interrupt:

https://lore.kernel.org/openbmc/HK2PR03MB4371F006185ADBBF812A5892AE509@HK2PR03MB4371.apcprd03.prod.outlook.com/

* A discussion on patch 10/18 about lifting the single-open constraint

https://lore.kernel.org/openbmc/CAPnigKku-EjOnV9gsmnXzH=XZxSU78iLeccNbsK8k2_4b4UwSg@mail.gmail.com/

I need to do a v4 to fix the bug in the Nuvoton driver. Did you have any
feedback for the remaining patches or thoughts on the discussions linked
above?  I'd like to incorporate whatever I can into the series before
respinning.

Cheers,

Andrew