linux-kernel - Re: [PATCH] ixgbe: Manual AN-37 for troublesome link partners for X550 SFI

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Message-ID: <becaaeaf-e76a-43d2-b6e1-e7cc330d8cae@lunn.ch>
Date: Fri, 6 Sep 2024 17:54:49 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Jeff Daly <jeffd@...icom-usa.com>
Cc: anthony.l.nguyen@...el.com, przemyslaw.kitszel@...el.com,
	davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, intel-wired-lan@...ts.osuosl.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ixgbe: Manual AN-37 for troublesome link partners for
 X550 SFI

On Fri, Sep 06, 2024 at 06:41:45AM -0400, Jeff Daly wrote:
> Resubmit commit 565736048bd5 ("ixgbe: Manual AN-37 for troublesome link
> partners for X550 SFI")
> 
> Some (Juniper MX5) SFP link partners exhibit a disinclination to
> autonegotiate with X550 configured in SFI mode.  This patch enables
> a manual AN-37 restart to work around the problem.
> 
> Resubmitted patch includes a module parameter (default disabled) to
> isolate changes.

Module parameters are not liked in networking code. They are very user
unfriendly, and poorly documented.

Why do you need it? Is this change risky?

	Andrew