Re: [PATCH v2] i2c: designware: Fix corrupted memory seen in the ISR

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Subject: Re: [PATCH v2] i2c: designware: Fix corrupted memory seen in the ISR
From: Wolfram Sang <wsa@xxxxxxxxxx>
Date: Tue, 31 Oct 2023 06:51:39 +0100
Cc: Jarkko Nikula <jarkko.nikula@xxxxxxxxxxxxxxx>, Serge Semin <fancer.lancer@xxxxxxxxx>, Yann Sionneau <ysionneau@xxxxxxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Yann Sionneau <yann@xxxxxxxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>, Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>, Jan Dabros <jsd@xxxxxxxxxxxx>, Andi Shyti <andi.shyti@xxxxxxxxxx>, Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>, linux-i2c@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
In-reply-to: <ab57ba73-ce62-43fc-9cb1-d2db1bd13cd9@os.amperecomputing.com>
Mail-followup-to: Wolfram Sang <wsa@xxxxxxxxxx>, Jan Bottorff <janb@xxxxxxxxxxxxxxxxxxxxxx>, Jarkko Nikula <jarkko.nikula@xxxxxxxxxxxxxxx>, Serge Semin <fancer.lancer@xxxxxxxxx>, Yann Sionneau <ysionneau@xxxxxxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Yann Sionneau <yann@xxxxxxxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>, Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>, Jan Dabros <jsd@xxxxxxxxxxxx>, Andi Shyti <andi.shyti@xxxxxxxxxx>, Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>, linux-i2c@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
References: <p7wl7fk4cdyhvw2mfsa6sfc7dhfls3foplmzwj6pzstargt2oh@33zuuznup2gq> <ZQq2cT+/QCenR5gx@shikoro> <ba6d4378-b646-4514-3a45-4b6c951fbb9c@kalrayinc.com> <9219ad29-b9a3-4f07-81b5-43b4b6d9d178@os.amperecomputing.com> <d65lwrkji3rvw6r4jdcumo4zu3hbu6zpv6xq73hw6hcshvhtkw@jvuohb3f3loo> <3a305e74-2235-47ab-8564-0c594f24dc0a@os.amperecomputing.com> <ZRSEntqne/1y1ozq@shikoro> <1d56ceef-6573-43b9-a050-124c341a0698@linux.intel.com> <ZTpLHZZYtd1WgBu6@ninjato> <ab57ba73-ce62-43fc-9cb1-d2db1bd13cd9@os.amperecomputing.com>

> I'm personally in camp #2, safety first, performance fine tuning later if
> needed. Latent missing barrier bugs are difficult and time consuming to
> find.

I agree.

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References:
- Re: [PATCH v2] i2c: designware: Fix corrupted memory seen in the ISR
  - From: Serge Semin
- Re: [PATCH v2] i2c: designware: Fix corrupted memory seen in the ISR
  - From: Wolfram Sang
- Re: [PATCH v2] i2c: designware: Fix corrupted memory seen in the ISR
  - From: Yann Sionneau
- Re: [PATCH v2] i2c: designware: Fix corrupted memory seen in the ISR
  - From: Jan Bottorff
- Re: [PATCH v2] i2c: designware: Fix corrupted memory seen in the ISR
  - From: Serge Semin
- Re: [PATCH v2] i2c: designware: Fix corrupted memory seen in the ISR
  - From: Jan Bottorff
- Re: [PATCH v2] i2c: designware: Fix corrupted memory seen in the ISR
  - From: Wolfram Sang
- Re: [PATCH v2] i2c: designware: Fix corrupted memory seen in the ISR
  - From: Jarkko Nikula
- Re: [PATCH v2] i2c: designware: Fix corrupted memory seen in the ISR
  - From: Wolfram Sang
- Re: [PATCH v2] i2c: designware: Fix corrupted memory seen in the ISR
  - From: Jan Bottorff

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