e1000e_check_downshift(9)

📦 version 7.3.1, in nixpkgs unstable

💅 e1000e_check_downshift(9) — honestly kinda iconic

okay so bestie, welcome to the Kernel API Manual page for e1000e_check_downshift(9). Sit down, grab a strawberry drink 🍓, and let's get into it — this one's short but it's important.

✨ NAME ✨

e1000e_check_downshift — Checks whether a downshift in speed occurred 💀

Like, it literally just peeks at your link and is like "bestie… did we just drop speed? because I think we dropped speed."

🎀 SYNOPSIS 🎀

s32 e1000e_check_downshift(struct e1000_hw *hw);

🦋 ARGUMENTS 🦋

  • hw — pointer to the HW structure 🫶. That's it. That's the whole argument list. She's low maintenance.

💜 DESCRIPTION 💜

So here's the tea, and I need you to listen:

  • Success returns 0 ✨
  • Failure returns 1 🙈

That's the whole mood. And how does it even figure out a downshift happened? A downshift is detected by querying the PHY link health 🩺 — like a little vibe check for your physical layer. If the link's not feeling its best self, this function notices. No cap.

🌈 SEE ALSO 🌈

The kernel file lives at ./drivers/net/ethernet/intel/e1000e/phy.c — that's her home address, respect it 🏠.

And now, the friend group 👑 (yes, all of them, I'm not skipping a single one, we don't do that here):

That's the whole group chat and yes, they're all invited to the function 🧚

ngl bestie, if you take one thing from this page: 0 = slay, 1 = uh oh 💀. Periodt.

and that's the page!! 🌸 source file is ./drivers/net/ethernet/intel/e... and the date stamp is October 2026 — mwah, love u, bye 🎀💖✨

📦 where this page comes from