netdev - Re: [PATCH net 3/3] net: phylink: disable autoneg for interfaces that have no inband

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Message-ID: <aL6JSEhTRh2q_Jxe@shell.armlinux.org.uk>
Date: Mon, 8 Sep 2025 08:44:08 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Ilya K <me@...ti.me>
Cc: andrew@...n.ch, davem@...emloft.net, edumazet@...gle.com,
	hkallweit1@...il.com, kuba@...nel.org, matt@...verse.com.au,
	netdev@...r.kernel.org, pabeni@...hat.com
Subject: Re: [PATCH net 3/3] net: phylink: disable autoneg for interfaces
 that have no inband

On Mon, Sep 08, 2025 at 10:38:59AM +0300, Ilya K wrote:
> Hey folks, this seems to have regressed a different setup: I have a Banana Pi BPi-R4 connected to a dumb unmanaged switch with a 10GbaseCR cable, and it fails to negotiate a link with a21202743f9c applied. Reverting it makes things work again. It seems like phylink_get_inband_type doesn't handle base-R modes at all? I'll maybe have some more time to poke this myself later this week, but throwing it out there in case anyone more experienced has ideas.

10GBASE-CR (based upon BASE-R) has no inband signalling for
autonegotiation.

Please enable debugging in phylink and include this is any bug report.

Thanks.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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