__pci_register_driver(9)

🌸 NAME 🌸

__pci_register_driver — register a new pci driver

okay bestie, welcome to the Kernel API Manual page for __pci_register_driver(9) ✨ this one is lowkey a main character in the PCI driver registration world.

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✨ SYNOPSIS ✨

int __pci_register_driver (struct pci_driver *drv , struct module *owner
, const char *mod_name );

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🎀 ARGUMENTS 🎀

• drv — the driver structure to register. this is the struct you're bringing to the function, fr fr.
• owner — owner module of drv. like, whose module is this? 👑
• mod_name — module name string. just the name, bestie.

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💖 DESCRIPTION 💖

okay so what does it actually do? it adds the driver structure to the list of registered drivers. that's the whole vibe ✅

it returns a negative value on error, otherwise 0. no error means it's a slay.

and listen: if no error occurred, the driver remains registered even if no device was claimed during registration. so yes, it can stay on the list even when no device got claimed — that's literally in the spec, don't shoot the messenger 😭

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🦋 SEE ALSO 🦋

Kernel file ./drivers/pci/pci-driver.c is right there in the see-also zone. also go peek at:

• do_pci_add_dynid(9)
• pci_add_dynid(9)
• do_pci_match_id(9)
• pci_match_id(9)
• pci_match_device(9)
• new_id_store(9)
• remove_id_store(9)
• __pci_device_probe(9)
• pci_restore_standard_config(9)
• pci_unregister_driver(9)
• pci_dev_driver(9)
• pci_bus_match(9)
• pci_dev_get(9)
• pci_dev_put(9)
• pci_uevent_ers(9)
• pci_dma_configure(9)

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xoxo bestie 💅 — sourced from ./drivers/pci, dated October 2026, and filed under __pci_register_driver(9) 🫶✨