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Message-ID: <ZOx0L722xg5-J_he@hog>
Date:   Mon, 28 Aug 2023 12:17:19 +0200
From:   Sabrina Dubroca <sd@...asysnail.net>
To:     "Radu Pirea (NXP OSS)" <radu-nicolae.pirea@....nxp.com>
Cc:     andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, richardcochran@...il.com,
        sebastian.tobuschat@....com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC net-next v2 5/5] net: phy: nxp-c45-tja11xx: implement
 mdo_insert_tx_tag

2023-08-24, 12:16:15 +0300, Radu Pirea (NXP OSS) wrote:
> Implement mdo_insert_tx_tag to insert the TLV header in the ethernet
> frame.
> 
> If extscs parameter is set to 1, then the TLV header will contain the
> TX SC that will be used to encrypt the frame, otherwise the TX SC will
> be selected using the MAC source address.

In which case would a user choose not to use the SCI? Using the MAC
address is probably fine in basic setups, but having to fiddle with a
module parameter (so unloading and reloading the module, which means
losing network connectivity) to make things work when the setup
evolves is really not convenient.

Is there a drawback to always using the SCI?

-- 
Sabrina

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