pci_scan_child_bus(9)

💖 NAME 💖

Okay bestie, we're deep in the Kernel API Manual and this is pci_scan_child_bus(9) — and its whole thing is: pci_scan_child_bus — Scan devices below a bus. Slay. 🎀

✨ SYNOPSIS ✨

Here's the signature, copy it exactly, no cap:

unsigned int pci_scan_child_bus (struct pci_bus *bus );

🦋 ARGUMENTS 🦋

• bus — Bus to scan for devices. That's the one, bestie.

🌸 DESCRIPTION 🌸

So this function scans devices below bus, including subordinate buses. It returns the new subordinate number including all the found devices. Periodt. 💅

🌈 SEE ALSO 🌈

Kernel file ./drivers/pci/probe.c — plus the whole friend group:

• __pci_size_bars(9)
• __pci_read_base(9)
• pcie_get_link_speed(9)
• pci_ea_fixed_busnrs(9)
• pci_ext_cfg_is_aliased(9)
• pci_cfg_space_size_ext(9)
• pci_intx_mask_broken(9)
• pci_setup_device(9)
• pcie_relaxed_ordering_enabled(9)
• pci_release_dev(9)
• pci_scan_slot(9)
• pci_scan_child_bus_extend(9)
• pcibios_root_bridge_prepare(9)
• pci_rescan_bus_bridge_resize(9)
• pci_rescan_bus(9)

Mwah 💋 — this icon is from ./drivers/pci, dated October 2026, and the page is pci_scan_child_bus(9). It's giving kernel manual realness, fr fr. 🫶