e1000_read_posted_mbx(9)

📦 version 7.3.1, in nixpkgs unstable

💌 e1000_read_posted_mbx(9) — the kernel API manual, bestie edition

okay so this is a page from the Kernel API Manual (section 9, the one for kernel routines, iykyk) and it's about e1000_read_posted_mbx — a lil function that waits around for a message notification and then scoops up the message. it's giving "waiting by the mailbox for your bestie to text back" energy and honestly? relatable. 🫶

✨ NAME ✨

e1000_read_posted_mbx — wait for message notification and receive message

like literally, that's the whole job. it waits, then it receives. iconic behavior, no notes. 💅

🌸 SYNOPSIS 🌸

s32 e1000_read_posted_mbx (struct e1000_hw *hw , u32 *msg , u16 size );

so it hands you back an s32 (that's the return situation), and it wants three things: a pointer to the HW structure, a message buffer, and a size. periodt. 🎀

🦋 ARGUMENTS 🦋

  • hw — pointer to the HW structure. this is the hardware bestie, the main character of the whole operation 💖
  • msg — The message buffer. this is where the message goes. it's the spot, ok? 🍓
  • size — Length of buffer. yes, you gotta tell it how big the buffer is. be responsible. 🙈

💀 DESCRIPTION 💀

returns SUCCESS if it successfully received a message notification and copied it into the receive buffer.

that's it. that's the vibe check. it gets the notification, it copies the message into the receive buffer, and it says SUCCESS — and if it doesn't succeed, well… it does not return SUCCESS. use that information wisely ✨

real talk though: SUCCESS is the happy path, and the return value is how you find out which path you're on. check it, don't assume it. 😭

🧚 SEE ALSO 🧚

Kernel file:

./drivers/net/ethernet/intel/igbvf/mbx.c

and the whole friend group of related functions — these are all in the same orbit, go say hi:

👑 sign-off 👑

this page came from the Kernel API Manual and it's sourced from ./drivers/net/ethernet/intel/i... — yes, that's genuinely how the original source line is written, truncated with the ... and all, don't come for me 🙈 — and it's dated October 2026. go forth, read posted mailboxes, slay. 🌈⭐💜

📦 where this page comes from