Re: [PATCH 1/2] tty: pl011: Work around QDF2400 E44 stuck BUSY bit

From	Marc Zyngier <marc.zyngier@arm.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 1/2] tty: pl011: Work around QDF2400 E44 stuck BUSY bit
Date	2017-02-08 17:00 +0100
Message-ID	<t8CP0-2b0-21@gated-at.bofh.it> (permalink)
References	<t8oM1-1D5-3@gated-at.bofh.it> <t8zxM-h3-23@gated-at.bofh.it> <t8AtR-Rq-51@gated-at.bofh.it> <t8ADw-UD-15@gated-at.bofh.it> <t8ClX-20B-7@gated-at.bofh.it>
Organization	ARM Ltd

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On Wed, Feb 08 2017 at  2:09:12 pm GMT, Timur Tabi <timur@codeaurora.org> wrote:
> Mark Rutland wrote:
>
>>> No, only Kryo and Falkor V1 based SOCs have this problem.  Falkor V2
>>> will have this fixed.  We intend to revert these fixes after Falkor
>>> V1 SOCs are no longer supported.
>>
>> Supported by whom?
>
> Qualcomm.
>
>> Generally, once something's upstreamed we expect it to remain supported.
>
> The V1 SOCs are technically pre-production, but still in wide use and
> it will be a while before they are all replaced by V2 SOCs.  It's only
> because of the "ugliness" of the erratum and its work-around that we
> want to git rid of it when we can.

Interesting. How will you guarantee that nobody will ever want to run a
mainline kernel on this box after a certain date? Self-destruct timer?
;-)

As someone who runs mainline on HW that exceeded its "sell-by" date by a
few decades, I'm genuinely interested.

Thanks,

	M.
-- 
Jazz is not dead, it just smell funny.

Thread

[PATCH 1/2] tty: pl011: Work around QDF2400 E44 stuck BUSY bit Christopher Covington <cov@codeaurora.org> - 2017-02-08 02:00 +0100
  Re: [PATCH 1/2] tty: pl011: Work around QDF2400 E44 stuck BUSY bit Timur Tabi <timur@codeaurora.org> - 2017-02-08 05:10 +0100
    Re: [PATCH 1/2] tty: pl011: Work around QDF2400 E44 stuck BUSY bit Christopher Covington <cov@codeaurora.org> - 2017-02-08 23:30 +0100
      Re: [PATCH 1/2] tty: pl011: Work around QDF2400 E44 stuck BUSY bit Timur Tabi <timur@codeaurora.org> - 2017-02-09 00:10 +0100
  Re: [PATCH 1/2] tty: pl011: Work around QDF2400 E44 stuck BUSY bit Robin Murphy <robin.murphy@arm.com> - 2017-02-08 13:30 +0100
    Re: [PATCH 1/2] tty: pl011: Work around QDF2400 E44 stuck BUSY bit Timur Tabi <timur@codeaurora.org> - 2017-02-08 14:30 +0100
      Re: [PATCH 1/2] tty: pl011: Work around QDF2400 E44 stuck BUSY bit Mark Rutland <mark.rutland@arm.com> - 2017-02-08 14:40 +0100
        Re: [PATCH 1/2] tty: pl011: Work around QDF2400 E44 stuck BUSY bit Timur Tabi <timur@codeaurora.org> - 2017-02-08 16:30 +0100
          Re: [PATCH 1/2] tty: pl011: Work around QDF2400 E44 stuck BUSY bit Marc Zyngier <marc.zyngier@arm.com> - 2017-02-08 17:00 +0100
            Re: [PATCH 1/2] tty: pl011: Work around QDF2400 E44 stuck BUSY bit Timur Tabi <timur@codeaurora.org> - 2017-02-08 17:10 +0100
      Re: [PATCH 1/2] tty: pl011: Work around QDF2400 E44 stuck BUSY bit Christopher Covington <cov@codeaurora.org> - 2017-02-08 23:00 +0100

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