pci_release_regions(9)

📦 version 7.3.1, in nixpkgs unstable

🌸 pci_release_regions — the Kernel API Manual, bestie edition 💅

okay so picture this: you're poking at the Linux kernel's PCI subsystem, specifically the pci_release_regions(9) page from the Kernel API Manual. It's short, it's sweet, and it's literally the "ok we're done here, clean up your mess" function. Let's get into it 🫶

✨ NAME ✨

pci_release_regions — Release reserved PCI I/O and memory resources 💖

✨ SYNOPSIS ✨

void pci_release_regions (struct pci_dev *pdev );

that's it. that's the whole vibe. one argument, no return value, she's lowkey minimal 😌

✨ ARGUMENTS ✨

  • pdev — the PCI device whose resources were previously reserved by pci_request_regions. like, this is the specific device you're handing the cleanup duty to, no cap 🎀

✨ DESCRIPTION ✨

So here's what's happening, bestie 👑 — this function releases all PCI I/O and memory resources that were previously reserved by a successful call to pci_request_regions.

⚠️ And listen, this part is important: call this function only after all use of the PCI regions has ceased. Like, actually done. Fully done. No "one more quick read" energy. The regions gotta be untouched before you let this one loose, fr fr 😭

think of it as the graceful exit — pci_request_regions walks in and grabs the resources, pci_release_regions walks out and puts them back. periodt 💅

✨ SEE ALSO ✨

okay so this is the part where the manpage absolutely ate — there are SO many cross-references, it's giving "main character with a whole entourage" 🌈. First up, the source file:

Kernel file ./drivers/pci/pci.c

and then the entire squad, in order, no skips, no cuts 🧚:

like... that's a lot of friends. she's connected 💀✨

and that's the whole page, bestie 🎀 this lil doc lives over in ./drivers/pci and it's dated October 2026 — so yeah, mark your calendar, screenshot it, send it to the group chat, because pci_release_regions(9) said what she said and then signed off 💜🦋⭐

📦 where this page comes from