pci_common_swizzle(9)

hiii bestie 💖 welcome to the pci_common_swizzle(9) page, straight outta the Kernel API Manual — and yes, we're about to talk about swizzling INTx all the way up to the root bridge 👑

🌸 NAME 🌸

pci_common_swizzle — swizzle INTx all the way to root bridge 💅

✨ SYNOPSIS ✨

u8 pci_common_swizzle (struct pci_dev *dev , u8 *pinp );

🎀 ARGUMENTS 🎀

• dev — the PCI device 🫶
• pinp — pointer to the INTx pin value (1=INTA, 2=INTB, 3=INTD, 4=INTD) 😭

💅 DESCRIPTION 💅

okay so real talk: this performs INTx swizzling for a device. It traverses through all PCI-to-PCI bridges all the way up to a PCI root bus. It's giving "follow the bridge chain until the root bus says hi" energy 🦋✨

👑 SEE ALSO 👑

Kernel file ./drivers/pci/irq.c 👀 — also go peek at pci_request_irq(9), pci_free_irq(9), pci_swizzle_interrupt_pin(9), pci_check_and_mask_intx(9), pci_check_and_unmask_intx(9), and pcibios_penalize_isa_irq(9) 🫶

that's the whole vibe, bestie 💖 — source/version: ./drivers/pci, dated October 2026. mwah 💋🎀