linux-kernel - Re: [PATCH] e1000e: fix link fluctuations problem

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Message-ID: <f47e0bb6-fb3f-4d0e-923a-cdb5469b6cbe@lunn.ch>
Date: Tue, 7 May 2024 03:39:21 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Ricky Wu <en-wei.wu@...onical.com>
Cc: jesse.brandeburg@...el.co, anthony.l.nguyen@...el.com,
	intel-wired-lan@...ts.osuosl.org, davem@...emloft.net,
	edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	rickywu0421@...il.com
Subject: Re: [PATCH] e1000e: fix link fluctuations problem

On Thu, May 02, 2024 at 05:12:15PM +0800, Ricky Wu wrote:
> As described in https://bugzilla.kernel.org/show_bug.cgi?id=218642,
> some e1000e NIC reports link up -> link down -> link up when hog-plugging
> the Ethernet cable.
> 
> The problem is because the unstable behavior of Link Status bit in
> PHY Status Register of some e1000e NIC.

Why PHY is this? It might be the PHY manufacture has an errata, since
this is probably not the MAC causing the problem, but the PHY itself.

	Andrew