linux-kernel - Re: [PATCH v2 net] net: dsa: mv88e6xxx: Wait for EEPROM done before HW reset

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Message-ID: <ZNj3c2TO6bqfe0IM@vergenet.net>
Date:   Sun, 13 Aug 2023 17:32:03 +0200
From:   Simon Horman <horms@...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, kuba@...nel.org, pabeni@...hat.com,
        sgarzare@...hat.com, AVKrasnov@...rdevices.ru
Subject: Re: [PATCH v2 net] net: dsa: mv88e6xxx: Wait for EEPROM done before
 HW reset

On Fri, Aug 11, 2023 at 04:28:32PM -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 unexpect mode

nit: unexpect -> unexpected

> rendering it inoperational.
> 
> Fixes: 8abbffd27ced ("net: dsa: mv88e6xxx: Wait for EEPROM done after HW reset")
> Signed-off-by: Alfred Lee <l00g33k@...il.com>