devm_free_irq(9)

💖 devm_free_irq(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ this one's short and sweet and honestly iconic for it.

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🌸 NAME 🌸

devm_free_irq — free an interrupt 🎀

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✨ SYNOPSIS ✨

void devm_free_irq (struct device *dev , unsigned int irq , void *dev_id );

like, that's the whole signature. no cap. 🫶

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🦋 ARGUMENTS 🦋

• dev — the device you wanna free the interrupt for, bestie 💅
• irq — the interrupt line you're freeing, literally the number
• dev_id — the device identity you're freeing, yes it matters

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💜 DESCRIPTION 💜

okay so here's the tea: except for that extra dev argument, this function takes the same arguments and does the same thing as free_irq. same energy, just with the device tacked on. periodt. 👑

the way that matters tho: this one — not free_irq — is what you should use to manually free IRQs that were allocated with devm_request_irq. so if you used the devm version to get it, use the devm version to yeet it. matching sets, fr fr 🎀

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🌈 SEE ALSO 🌈

• Kernel file ./kernel/irq/devres.c
• devm_request_threaded_irq(9)
• devm_request_any_context_irq(9)
• __devm_irq_alloc_descs(9)
• devm_irq_alloc_generic_chip(9)
• devm_irq_setup_generic_chip(9)
• devm_irq_domain_instantiate(9)

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🧚 go read the friends too, they're all in the same lil squad 💖

and that's the whole page, bestie 💅 this one came from ./kernel/irq, dated October 2026, and the header says devm_free_irq(9) — go off, interrupt queen 👑🌸