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

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Date:   Tue, 15 Aug 2023 03:16:03 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Alfred Lee <l00g33k@...il.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        olteanv@...il.com, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, 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, Aug 14, 2023 at 05:13:23PM -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.

Hi Alfred

It is normal to place a history after the --- of what changed between
each version.

> Fixes: a3dcb3e7e70c ("net: dsa: mv88e6xxx: Wait for EEPROM done after HW reset")
> Signed-off-by: Alfred Lee <l00g33k@...il.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew