e1000_check_polarity_igp(9)

📦 version 7.3.1, in nixpkgs unstable

💅 e1000_check_polarity_igp(9) — from the Kernel API Manual, bestie ✨

okay so picture this: it's late, you're deep in the kernel tree, and somebody's gotta check the polarity. that someone? this function. this page lives in the Kernel API Manual and honestly it's giving "small function, big responsibilities" 🫶

🌸 NAME 🌸

e1000_check_polarity_igp — she checks the polarity. that's it, that's the job. iconic, lowkey 🎀

✨ SYNOPSIS ✨

s32 e1000_check_polarity_igp(struct e1000_hw *hw);

🦋 ARGUMENTS 🦋

  • hw — pointer to the HW structure. yes bestie, the whole hardware struct, handed to you like a little gift 💖

💅 DESCRIPTION 💅

Success returns 0, Failure returns -E1000_ERR_PHY (-2). periodt. no cap, those are the only two moods she has 😭

Polarity is determined based on the PHY port status register, and the current speed (since there is no polarity at 100Mbps). so like — she peeks at the PHY port status register, clocks the current speed, and does the math. and at 100Mbps? no polarity, bestie, it literally doesn't exist there. the vibe check just comes back empty 🌈

🔥 SEE ALSO 🔥

the kernel file:

  • ./drivers/net/ethernet/intel/e1000e/phy.c

and the whole entire friend group — like, the whole group chat 👑:

like… she knows everybody. main character energy fr fr 💜

ok and before you go — this page is stamped <purple>October 2026</purple>, sourced from ./drivers/net/ethernet/intel/e..., and it goes out under the header e1000_check_polarity_igp(9) in the Kernel API Manual. mwah, go check some polarity bestie 💋🌸
📦 where this page comes from