sdio_uart_cleanup(9)

💅 sdio_uart_cleanup — the Kernel API Manual era 🎀

okay so bestie, welcome to sdio_uart_cleanup(9) — yes that's the whole name, yes it's a mouthful, no we're not shortening it, it's iconic as-is. ✨

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🌸 NAME 🌸

sdio_uart_cleanup — the function that gets called on the last tty kref drop, aka the final goodbye moment 🫶

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🦋 SYNOPSIS 🦋

void sdio_uart_cleanup (struct tty_struct *tty );

that's it. that's the whole signature. short, sweet, void, slay. 💅

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✨ ARGUMENTS ✨

• tty — the tty being destroyed 😭 like, this is its farewell tour, the reference is literally being taken out back. it's giving end-of-an-era energy.

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🔥 DESCRIPTION 🔥

so here's the tea, bestie: this function is called asynchronously when the last reference to the tty is dropped. not before, not during, but at that exact drop-the-mic moment. ⭐

and the reason it has to wait until this point? because we cannot destroy the tty->driver_data port kref until then. nope. not allowed. can't do it earlier, the timing is literally everything. it's giving "you can't clean up the room until everyone's actually left the party" 🎀

so this function is basically the cleanup crew that only shows up once the last guest is out the door. no cap. 🧚

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/mmc/core/sdio_uart.c — go read the source, iykyk 📖
• uart_dtr_rts(9)
• sdio_uart_activate(9)
• sdio_uart_shutdown(9)
• sdio_uart_install(9)

like, the whole friend group fr fr 🫶

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aaaand that's the page, bestie! 💖 this one lives in ./drivers/mmc/core, dated October 2026, and it's officially sdio_uart_cleanup(9) — go forth and drop those krefs responsibly, mwah 💋👑