pci_cfg_access_lock(9)

🎀 pci_cfg_access_lock(9) 🎀

okay bestie, welcome to pci_cfg_access_lock from the Kernel API Manual — the little lock that says “not yet, config space is busy” 💅

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✨ NAME ✨

pci_cfg_access_lock — Lock PCI config reads/writes 🔒

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🌸 SYNOPSIS 🌸

void pci_cfg_access_lock (struct pci_dev *dev );

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🦋 ARGUMENTS 🦋

• dev — the pci device struct. that's it, that's the vibe 🫶

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💖 DESCRIPTION 💖

When access is locked, any userspace reads or writes to config space and concurrent lock requests will sleep 😴 until access is allowed via pci_cfg_access_unlock again.

like literally, everybody waits their turn. no cap. ⭐

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👀 SEE ALSO 👀

• the kernel file ./drivers/pci/access.c 🧚
• pci_bus_set_ops(9)
• pci_cfg_access_trylock(9)
• pci_cfg_access_unlock(9)

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mwah 💋 — source/version ./drivers/pci, dated October 2026, and pci_cfg_access_lock(9) is signing off 🫶✨