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Date:   Sat, 2 Jan 2021 02:49:55 +0100
From:   Pali Rohár <>
To:     Andrew Lunn <>,
        Thomas Schreiber <>
Cc:     Russell King - ARM Linux admin <>,
        Heiner Kallweit <>,
        "David S. Miller" <>,
        Jakub Kicinski <>,
        Marek Behún <>,,
Subject: Re: [PATCH 1/4] net: sfp: add workaround for Realtek RTL8672 and
 RTL9601C chips

On Thursday 31 December 2020 18:13:38 Andrew Lunn wrote:
> > > Looking at sfp_module_info(), adding a check for i2c_block_size < 2
> > > when determining what length to return. ethtool should do the right
> > > thing, know that the second page has not been returned to user space.
> > 
> > But if we limit length of eeprom then userspace would not be able to
> > access those TX_DISABLE, LOS and other bits from byte 110 at address A2.
> Have you tested these bits to see if they actually work? If they don't
> work...

On Ubiquiti module that LOS bit does not work.

I think that on CarlitoxxPro module LOS bit worked. But I cannot test it
right now as I do not have access to testing OLT unit.

Adding Thomas to loop. Can you check if CarlitoxxPro GPON ONT module
supports LOS or other bits at byte offset 110 at address A2?

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