msi_lib_irq_domain_select(9)

💅 msi_lib_irq_domain_select(9) — like, the actual manual page

okay bestie, so this is from the Kernel API Manual, section 9, and the star of the show is msi_lib_irq_domain_select — the shared select function for NEXUS domains. yes queen, "NEXUS domains," we love a crossover episode 🦋

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✨ NAME ✨

msi_lib_irq_domain_select — the shared select function for NEXUS domains 🔥

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🌸 SYNOPSIS 🌸

int msi_lib_irq_domain_select (struct irq_domain *d , struct irq_fwspec
*fwspec , enum irq_domain_bus_token bus_token );

that's the whole signature, bestie — three args, one int coming back at you 💖

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🎀 ARGUMENTS 🎀

• d — Pointer to the irq domain on which select is invoked 👑 like, this is the domain we're asking the question about
• fwspec — Firmware spec describing what is searched 🔍 it's literally the description of the thing we're hunting for
• bus_token — The bus token for which a matching irq domain is looked up 🌈 your search filter, basically, iykyk

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⭐ RETURN ⭐

0 if d is not what is being looked for 🙈

that's it, that's the sentence — no cap, a plain 0 means "nope, not this one" 💀

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🧚 DESCRIPTION 🧚

1 if d is either the domain which is directly searched for or if d is providing the parent MSI domain for the functionality requested with bus_token 💅

so yeah — a 1 is the slay outcome: either d is the domain you're directly searching for, or d is the one providing the parent MSI domain for whatever functionality that bus_token asked for. both paths, same happy little 1 🫶

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/irqchip/irq-msi-lib.c 📁
• msi_lib_init_dev_msi_info(9) — go read that one next, bestie 👑

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okay that's the whole page, and yes we ate 🍓 sign-off time: this cutie comes from ./drivers/irqchip, stamped October 2026, under the Kernel API Manual banner — periodt 💜