netdev - Re: PCI ID conflict between ipw2x00 and i40e

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Message-ID: <f3ef31b332a5f28a20054d5e55e6024421f14dd1.camel@sipsolutions.net>
Date: Wed, 04 Feb 2026 14:51:54 +0100
From: Johannes Berg <johannes@...solutions.net>
To: Ethan Nelson-Moore <enelsonmoore@...il.com>, 
	intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org, 
	linux-wireless@...r.kernel.org
Cc: Tony Nguyen <anthony.l.nguyen@...el.com>, Przemek Kitszel	
 <przemyslaw.kitszel@...el.com>, Andrew Lunn <andrew+netdev@...n.ch>, "David
 S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub
 Kicinski <kuba@...nel.org>,  Paolo Abeni <pabeni@...hat.com>, Stanislav
 Yakovlev <stas.yakovlev@...il.com>
Subject: Re: PCI ID conflict between ipw2x00 and i40e

On Wed, 2026-02-04 at 02:15 -0800, Ethan Nelson-Moore wrote:
> I have written a script to find device IDs that are claimed by
> multiple drivers in the kernel. It has found that the PCI ID 8086:104f
> is supported by both drivers/net/wireless/intel/ipw2x00 and
> drivers/net/ethernet/intel/i40e. I assume the i40e one is correct,
> since that's what the ID is assigned to in the pci.ids database. Can
> anyone at Intel confirm this?

FWIW, I wouldn't be surprised if both are correct, and we just forgot
about an almost 30 year (I think) old device ID assignment ... I'll try
to figure out who even does these assignments etc., I don't know right
now. Let's see if I can figure out anything for the ancient WiFi IDs,
but I'm not very hopeful.

If we knew the subdevice IDs we could perhaps match on that, or add some
code to have ipw2x00 reject PCIe devices, and i40e reject PCI devices,
or something like that ...

johannes