pci_walk_bus(9)

💖 NAME 💖

okay bestie, this is the manual page for pci_walk_bus(9) in the Kernel API Manual — it's literally about walking devices on/under a bus and calling a callback. 🦋 no cap.

✨ SYNOPSIS ✨

       void pci_walk_bus (struct pci_bus *top , int (*cb)(struct pci_dev *,
       void *) , void *userdata );

🎀 ARGUMENTS 🎀

• top — the bus whose devices should be walked. 👑
• cb — the callback to be called for each device found. 💅
• userdata — an arbitrary pointer to be passed to the callback. 🫶

🌸 DESCRIPTION 🌸

So we walk the given bus, including any bridged devices on buses under this bus, and we call the provided callback on each device found. ✨

We check the return of cb each time. If it returns anything other than 0, we break out. 💀 that's the whole rule, fr fr.

🌈 SEE ALSO 🌈

• 🧚 Kernel file ./drivers/pci/bus.c
• 🔥 pci_bus_alloc_resource(9)
• ⭐ pci_bus_add_device(9)
• 💜 pci_bus_add_devices(9)
• 🦋 pci_walk_bus_reverse(9)

mwah 💋 this page lives in ./drivers/pci, stamped October 2026, and it's pci_walk_bus(9) — bye bestie! 🎀