netdev - Re: [PATCH net-next] uapi: net: mii: correct 100BASE4 bit descriptions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <268c80bc-e2be-453f-8d03-bf5a5cc1cf9c@lunn.ch>
Date: Thu, 29 Jan 2026 14:49:20 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Ethan Nelson-Moore <enelsonmoore@...il.com>
Cc: netdev@...r.kernel.org, linux-api@...r.kernel.org,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>
Subject: Re: [PATCH net-next] uapi: net: mii: correct 100BASE4 bit
 descriptions

On Wed, Jan 28, 2026 at 09:17:35PM -0800, Ethan Nelson-Moore wrote:
> The 100BASE4 bits in MII registers indicate 100BASE-T4, as can be seen
> in Ethernet PHY documentation (such as the datasheet linked below), not
> 4K packets. Correct the comments describing these bits.
> 
> Link: https://www.ti.com/lit/ds/symlink/dp83849c.pdf

It is much better to reference IEEE 802.3, clause 22, section X.Y.Z.

The standard is free to download.

I do wounder where the 4K comment comes from. Did 100BASE-T4 introduce
the concept of jumbo packets?

    Andrew

---
pw-bot: cr