snd_mpu401_uart_interrupt(9)

💖 snd_mpu401_uart_interrupt 💖

ok so this is a page from the Kernel API Manual, and bestie, we are about to get intimately familiar with the generic MPU401-UART interrupt handler. it's giving "small function, big responsibility." let's go 🎀

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✨ NAME ✨

snd_mpu401_uart_interrupt — the generic MPU401-UART interrupt handler. that's it, that's the whole vibe. she handles interrupts. iconic behavior honestly 👑

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✨ SYNOPSIS ✨

irqreturn_t snd_mpu401_uart_interrupt (int irq , void *dev_id );

like… look at her. two arguments, one irqreturn_t coming back at you. no cap, she's efficient 💅

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✨ ARGUMENTS ✨

• irq — the irq number. yes, the irq number. the number of the irq. 🦋
• dev_id — the mpu401 instance. this is your lil pointer to the device, literally the whole mpu401 situation, passed through as a void * because kernel APIs love a mystery 🕵️‍♀️

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✨ DESCRIPTION ✨

ok so what does she actually do? she processes the interrupt for MPU401-UART i/o. that's the whole job. the interrupt comes in, she processes it, done. main character energy from start to finish 🔥

no extra lore, no side quests — just MPU401-UART i/o interrupt processing, periodt. 💜

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✨ RETURN ✨

• IRQ_HANDLED — if the interrupt was handled ✅ slay
• IRQ_NONE — otherwise 💀

that's it. binary queen. no in-between, no "maybe." iykyk 🌸

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✨ SEE ALSO ✨

• Kernel file ./sound/drivers/mpu401/mpu401_uart.c — go read the source bestie, it's right there 🫶
• snd_mpu401_uart_interrupt_tx(9)
• snd_mpu401_uart_new(9)

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and that's the page!! 🧚 source/version situation is ./sound/drivers/mpu401, dated October 2026, and the whole thing is filed under snd_mpu401_uart_interrupt(9) — catch you in the kernel, bestie 💖✨🌈