pci_dev_present(9)

✨ pci_dev_present(9) ✨

okay bestie, welcome to the Kernel API Manual entry for pci_dev_present(9) — she's a little function from the PCI corner of the kernel and she's about to tell you whether a device is there or not there, no cap. 💅

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🎀 NAME 🎀

pci_dev_present — returns 1 if a device matching the device list is present, 0 if not. That's it, that's the whole vibe check. 🦋

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🌸 SYNOPSIS 🌸

int pci_dev_present (const struct pci_device_id *ids );

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💖 ARGUMENTS 💖

• ids — a pointer to a null terminated list of struct pci_device_id structures. Basically you hand her a whole guest list describing the type of PCI device you're trying to find, and she goes looking. 📋✨

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🧚 DESCRIPTION 🧚

okay so here's the obvious fact that we all need to sit with for a sec: you do not have a reference to any device that might be found by this function. like, none. zero. she's just peeking, not holding. 🙈

and because of that, if that device gets removed from the system right after this function is finished, the value will be stale. like, the answer was true at the moment she checked, and then life moved on. it's giving "screenshot of a conversation" energy, not "live call" energy. 💀

so what's she actually for? use this function to find devices that are usually built into a system, or just as a general hint as to if another device happens to be present at this specific moment in time. that's the whole assignment, and honestly? she ate. 👑

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/pci/search.c
• pci_find_bus(9)
• pci_find_next_bus(9)
• pci_get_slot(9)
• pci_get_domain_bus_and_slot(9)
• pci_get_subsys(9)
• pci_get_device(9)
• pci_get_class(9)
• pci_get_base_class(9)

go read those next, iykyk 🫶

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and that's the page, bestie!! 💜 this icon lived in the ./drivers/pci directory, stamped October 2026 — mwah, slay, periodt. 🎀🌈⭐