pci_msi_unmask_irq(9)

✨ pci_msi_unmask_irq(9) ✨

okay so bestie, welcome to the Kernel API Manual 💖 this one's a tiny lil function with main character energy — it's the generic IRQ chip callback that unmasks PCI/MSI interrupts 🌈 literally just flips the "hey interrupt, you can talk to me again" switch, no cap.

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🎀 NAME 🎀

pci_msi_unmask_irq — the generic IRQ chip callback that unmasks PCI/MSI interrupts 🦋

Like, that's the whole vibe. It's a callback, it's generic, it's for the IRQ chip, and its whole job is unmasking those PCI/MSI interrupts. Periodt 💅

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✨ SYNOPSIS ✨

void pci_msi_unmask_irq (struct irq_data *data );

That's it. One function, one argument, returns void — it's giving "I do my thing and I don't report back" 😌

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🌸 ARGUMENTS 🌸

• data — pointer to the irqdata associated to that interrupt 🫶 like, this is the irq_data struct tied to the specific interrupt we're unmasking. It's the "which one, bestie?" of it all.

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💜 SEE ALSO 💜

Kernel file ./drivers/pci/msi/msi.c — go read it, iykyk 📖

• pci_msi_supported(9)
• pci_msi_mask_irq(9) — the chaotic sibling of this one, the mask to our unmask 💀
• msi_capability_init(9)
• pci_msi_vec_count(9)
• msix_prepare_msi_desc(9)
• msix_capability_init(9)
• pci_msix_write_tph_tag(9)

all of these are lowkey iconic in their own right, go give them a read 🔥

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ngl this page is short and sweet — but that's the point. unmask the interrupt, move on, slay 💅

k bye bestie, this page came from ./drivers/pci/msi and it's dated October 2026 — imagine being this fresh 👑 thanks for reading, mwah 🎀💖