pci_bridge_s...ry_bus_reset(9)

📦 version 7.3.1, in nixpkgs unstable

💅 pci_bridge_secondary_bus_reset(9) — the kernel API manual, but make it cute

okay so bestie, we're in the Kernel API Manual today (section 9, the fun one where all the kernel functions live ✨). Buckle up, this one's a little baddie with a big job.

🌸 NAME 🌸

pci_bridge_secondary_bus_reset — bestie, it literally resets the secondary bus on a PCI bridge. that's the whole vibe. 💅

✨ SYNOPSIS ✨

int pci_bridge_secondary_bus_reset (struct pci_dev *dev );

she's an int, she takes one argument, and she's ready to yank the reset line on a whole bus. iconic honestly 👑

🎀 ARGUMENTS 🎀

  • dev — the bridge device itself, i.e. the actual PCI bridge you're about to give a lil reset moment. it's a struct pci_dev *, no cap 🫶

🦋 DESCRIPTION 🦋

so the way this works: she uses the bridge control register to assert reset on the secondary bus. that's the mechanism, that's the move, no other vibes required.

and the important bit — devices on the secondary bus are left in power-on state after this. like, they come out of it fresh and powered, not sitting in some weird half-sleep situation. highkey important detail, don't forget it 💖

ngl this is the "hit the reset button on the whole downstream bus" function and i respect it deeply. periodt. 🔥

🌈 SEE ALSO 🌈

bestie. bestie. there are a LOT of friends here. this function knows literally everyone at the party. i'm listing every single one because they all deserve their moment 💜

she lives in the kernel file ./drivers/pci/pci.c, and here's the whole squad:

like i said. everyone. and she's friends with all of them fr fr 🧚

and that's the whole page bestie!! 🍓 this one came straight out of ./drivers/pci — dated October 2026 — so when you're deep in the kernel tree and you need to reset a secondary bus, you know exactly who to call. mwah, go slay your PCI bridge issue 💖✨🎀🦋

📦 where this page comes from