msi_get_virq(9)

msi_get_virq(9) 💅 — Kernel API Manual bestie edition ✨

okay so welcome to msi_get_virq(9), straight outta the Kernel API Manual, and she is lowkey iconic. no cap, this page is short but it's giving "know exactly what this helper does" energy 🫶

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🌸 NAME 🌸

msi_get_virq — Lookup the Linux interrupt number for a MSI index on the default interrupt domain 💫

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✨ SYNOPSIS ✨

the signature, verbatim, no edits bestie:

unsigned int msi_get_virq (struct device *dev , unsigned int index );

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🎀 ARGUMENTS 🎀

• dev — Device for which the lookup happens. literally the device we're checking, bestie 🫡
• index — The MSI index to lookup. the exact MSI index you want looked up ✨

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💖 RETURN 💖

On success, you get the Linux interrupt number and it's > 0 — slay. If it's not found, you get 0, and that's the whole mood 😭

So fr fr: success means > 0, not found means 0.

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🦋 SEE ALSO 🦋

• Kernel file ./include/linux/msi_api.h 📁
• union msi_instance_cookie(9) 🍓

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okay that's the whole page, bestie 🫶 — cute little footer sign-off: source/version ./include/linux, date October 2026, page msi_get_virq(9), mwah 💋