pci_msix_free_irq(9)

📦 version 7.3.1, in nixpkgs unstable

okay so bestie, we're looking at pci_msix_free_irq(9) from the Kernel API Manual — section 9 energy — and it's giving "undo button for one interrupt vector" realness 💅✨

🌸 NAME 🌸

pci_msix_free_irq — Free an interrupt on a PCI/MSI-X interrupt domain. lowkey the cleanup bestie 🫶

🎀 SYNOPSIS 🎀

void pci_msix_free_irq (struct pci_dev *dev , struct msi_map map );

💖 ARGUMENTS 💖

  • dev — the PCI device you're operating on, bestie 🌸
  • map — a struct msi_map describing the interrupt to free, iykyk

🦋 DESCRIPTION 🦋

This is literally undoing an interrupt vector allocation. That's the vibe. No extra plot twists.

okay but important: it does not disable MSI-X. not even a little. it's just the allocation getting undone, no cap 💀

🔥 SEE ALSO 🔥

Kernel file: ./drivers/pci/msi/api.c

okay that's the whole page, bestie 💖 source/version is ./drivers/pci/msi, dated October 2026 — periodt ✨

📦 where this page comes from