phy_ethtool_set_eee_noneg(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 phy_ethtool_set_eee_noneg(9) — the kernel API manual, but make it make sense 💅

Okay bestie, welcome to the phy_ethtool_set_eee_noneg(9) page from the Kernel API Manual ✨ this one's a little niche but honestly kind of iconic once you get the vibe, so strap in 🎀

✨ NAME ✨

phy_ethtool_set_eee_noneg — adjusts the MAC's LPI configuration without making the PHY renegotiate anything 🔥 no cap, that's the whole personality.

💖 SYNOPSIS 💖

void phy_ethtool_set_eee_noneg (struct phy_device *phydev , const struct
       eee_config *old_cfg );

🦋 ARGUMENTS 🦋

  • phydev — a pointer to the target PHY device structure 🫶 like, the PHY we're talking about rn.
  • old_cfg — a pointer to the eee_config structure holding the old EEE settings 💜 it's giving "receipts of how things used to be".

👑 DESCRIPTION 👑

So here's the tea ☕: this function updates the Energy Efficient Ethernet (EEE) configuration in the very specific case where only the MAC's Low Power Idle (LPI) configuration is changing — and it does this without triggering PHY renegotiation. Ngl that's the whole point 💅

It makes sure the MAC actually gets told about the new LPI settings by cycling the link down and then up 🔄 which, yes, is literally necessary for the MAC to adopt the new configuration. It's not extra, it's required, fr fr.

Small but important vibe check: this adjustment only happens if there's an actual change in the tx_lpi_enabled or tx_lpi_timer configuration 🙈 no change, no link cycling, that's the rule ✨

🌈 SEE ALSO 🌈

Kernel file ./drivers/net/phy/phy.c — and bestie, the friend list here is long, so let's go 🧚

And that's the whole page, bestie, you ate that 🍓 One last lil sign-off: this one lives in ./drivers/net/phy and it's dated October 2026 — so like, future-core of it all 💀✨ mwah 💋

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