pci_bus_add_device(9)

🌸 pci_bus_add_device(9) 🌸

okay bestie, welcome to the Kernel API Manual — this one's a tiny little function with main character energy. It lives in the kernel API section (that's the 9 in the name, iykyk), and it does exactly one iconic thing: it gets a single PCI device up and running. One. Device. Not a whole bus. We're being specific here. 💅

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✨ NAME ✨

pci_bus_add_device — start driver for a single device 🫶

Like, one device. Singular. She's not doing crowd work today.

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✨ SYNOPSIS ✨

void pci_bus_add_device (struct pci_dev *dev );

No return value, no drama — she's void, she just does it. ✨

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✨ ARGUMENTS ✨

• dev — the device to add 🎀 (a struct pci_dev *, bestie, so pass a pointer, not a vibe)

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✨ DESCRIPTION ✨

okay so here's the tea 🍵 — this function adds sysfs entries and starts device drivers for the device you hand it. That's it. That's the whole gig. She makes the device visible in sysfs and gets its driver going, and then she's done. Periodt. 💅

lowkey important: it's one device per call. If you've got a whole bus of them, that's a different function's problem (peep SEE ALSO 👀).

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✨ SEE ALSO ✨

• Kernel file ./drivers/pci/bus.c — the source, if you wanna read the receipts 🧚
• pci_bus_alloc_resource(9)
• pci_bus_add_devices(9) — the plural one, for when you have many 🦋
• pci_walk_bus(9)
• pci_walk_bus_reverse(9)

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and that's the whole page, bestie!! 🎀 signed, sealed, delivered from ./drivers/pci (Kernel API Manual), dated October 2026, and the title on the cover is — say it with me — pci_bus_add_device(9). slay. 💖✨