linux-kernel - Re: [PATCH net v3] net: dsa: mv88e6xxx: Wait for EEPROM done before HW reset

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Message-ID: <20230816201816.29bea470@kernel.org>
Date:   Wed, 16 Aug 2023 20:18:16 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Alfred Lee <l00g33k@...il.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        andrew@...n.ch, olteanv@...il.com, davem@...emloft.net,
        edumazet@...gle.com, pabeni@...hat.com, sgarzare@...hat.com,
        AVKrasnov@...rdevices.ru
Subject: Re: [PATCH net v3] net: dsa: mv88e6xxx: Wait for EEPROM done before
 HW reset

On Mon, 14 Aug 2023 17:13:23 -0700 Alfred Lee wrote:
> If the switch is reset during active EEPROM transactions, as in
> just after an SoC reset after power up, the I2C bus transaction
> may be cut short leaving the EEPROM internal I2C state machine
> in the wrong state.  When the switch is reset again, the bad
> state machine state may result in data being read from the wrong
> memory location causing the switch to enter unexpected mode
> rendering it inoperational.

I'll apply this instead of the v4:

https://lore.kernel.org/all/20230815220453.32035-1-l00g33k@gmail.com/

since you dropped Andrew's tag :( Please make sure you keep the tags
you were given.