pci_add_dynid(9)

💖 pci_add_dynid(9) 💖

okay bestie, welcome to the Kernel API Manual ✨ this one lives in pci_add_dynid(9) and it's genuinely such a slay little function — it's the one that lets a PCI driver pick up a brand-new device ID at runtime and then go re-check every device like "wait, do I match this one now?" 👑

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🌸 NAME 🌸

pci_add_dynid — add a new PCI device ID to this driver and re-probe devices 💅

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🦋 SYNOPSIS 🦋

int pci_add_dynid (struct pci_driver *drv , unsigned int vendor ,
unsigned int device , unsigned int subvendor , unsigned int subdevice ,
unsigned int class , unsigned int class_mask , unsigned long driver_data
);

like, yes, that's a lot of arguments, but honestly? each one is iconic in its own way 🎀

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✨ ARGUMENTS ✨

• drv — the target pci driver 🎯 the one we're gonna hand this new ID to.
• vendor — PCI vendor ID 🏷️
• device — PCI device ID 🏷️
• subvendor — PCI subvendor ID 🏷️
• subdevice — PCI subdevice ID 🏷️
• class — PCI class 🗂️
• class_mask — PCI class mask 🎭
• driver_data — private driver data 🔒 the driver's own lil stash of info.

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🧚 DESCRIPTION 🧚

So here's the vibe: this adds a new dynamic pci device ID to this driver, and then it makes the driver probe for all devices again 🔥 like it goes back around the whole bus and re-checks everything. main character energy fr fr.

⚠️ caveat cutie: drv must have been registered prior to calling this function. no registering after, no skipping, that's the rule 💀

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🌈 CONTEXT 🌈

Does GFP_KERNEL allocation. so like, it can sleep 😴 — keep that in mind iykyk.

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⭐ RETURN ⭐

• 0 on success 🎉
• -errno on failure 😭

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🔮 SEE ALSO 🔮

Kernel file ./drivers/pci/pci-driver.c — plus the whole friend group 🫶:

• do_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_register_driver(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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mwah 💋 that's the whole page — brought to you by the fine folks at ./drivers/pci, dated October 2026, in the pci_add_dynid(9) era. go forth and add those dynids bestie 🦋💜