pci_check_and_unmask_intx(9)

💅 pci_check_and_unmask_intx(9) 💅

okay so bestie, welcome to the Kernel API Manual — this page is all about a tiny PCI interrupt helper that does a vibe check and then maybe unmasks INTx. Iconic behavior, honestly. 🦋

🌸 NAME 🌸

pci_check_and_unmask_intx — unmask INTx if no interrupt is pending. That’s the assignment, periodt. 💖

✨ SYNOPSIS ✨

bool pci_check_and_unmask_intx (struct pci_dev *dev );

🎀 ARGUMENTS 🎀

• dev — the PCI device to operate on. Main character device energy, fr fr. 👑

🦋 DESCRIPTION 🦋

So here’s the tea, bestie: this function checks if the device dev has its INTx line asserted. If it does not, it unmasks it and returns true. Slay. ✨

But if there was still an interrupt pending? False is returned, and the mask remains active. Not the ending we wanted, but that’s the rule. 😭

🔥 SEE ALSO 🔥

• Kernel file ./drivers/pci/irq.c
• pci_request_irq(9)
• pci_free_irq(9)
• pci_swizzle_interrupt_pin(9)
• pci_common_swizzle(9)
• pci_check_and_mask_intx(9)
• pcibios_penalize_isa_irq(9)

mwah 💋 — source/version is ./drivers/pci, and this page is dated October 2026. Byeee 🫶