igb_check_for_msg_pf(9)

📦 version 7.3.1, in nixpkgs unstable

💌 igb_check_for_msg_pf — the "did my VF text me back??" check

okay so bestie, welcome to the Kernel API Manual (section 9, obviously 💅). Today's main character is igb_check_for_msg_pf, and honestly? She's a whole vibe check for your mailbox. Let's get into it 🎀

🌸 SYNOPSIS 🌸

s32 igb_check_for_msg_pf (struct e1000_hw *hw , u16 vf_number );

like, that's the whole summoning ritual. no cap ✨

🦋 ARGUMENTS 🦋

  • hw — pointer to the HW structure. yes girl, the hardware struct, hand it over 🫶
  • vf_number — the VF index. which VF are we checking on? that one. that number. 💖

💅 DESCRIPTION 💅

So here's the tea: this function checks to see if the VF has sent mail 📬. That's literally her job, that's her moment, that's her main character energy.

She returns SUCCESS if the VF has set the Status bit — slay, the message is there 🔥 — or else it's ERR_MBX, which is the lowkey "nobody home, no mail, empty inbox" outcome 😭.

fr fr, those are the only two results: SUCCESS or ERR_MBX. No in-between, no "seen but not replied", periodt.

👑 SEE ALSO 👑

The kernel file in question, for the curious besties out there:

./drivers/net/ethernet/intel/igb/e1000_mbx.c

And the whole friend group — the entire mailbox squad, all iconic, all linked:

like, the _pf variants are all here. the whole family reunion 😌💜

✨ okay that's the whole page, mwah ✨ brought to you by the fine folks at ./drivers/net/ethernet/intel/igb, dated October 2026 — and the manual section is igb_check_for_msg_pf(9) if you forgot already 🙈💖 go check that mailbox bestie 🍓

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