sdio_disable_func(9)

📦 version 7.3.1, in nixpkgs unstable

🎀 sdio_disable_func — kernel API manual, but make it make sense 🎀

okay so bestie, welcome to the sdio_disable_func(9) page 💅 this is from the Kernel API Manual, and we're about to get real cozy with one (1) very specific kernel function. no cap, it's a short one, so let's go ✨

🌸 NAME 🌸

sdio_disable_func — the function that disables a SDIO function 🫶 literally what it says on the tin, and honestly? iconic for that.

✨ SYNOPSIS ✨

int sdio_disable_func (struct sdio_func *func );

she returns an int and takes exactly one argument, periodt 💖

🦋 ARGUMENTS 🦋

  • func — the SDIO function you want to disable 🎀 that's the whole vibe. hand her the function, she powers it down.

💜 DESCRIPTION 💜

so here's what actually happens, friend: this bad girl powers down and deactivates a SDIO function 🔥 it's giving lights-off, music-stopped, going-home energy.

and the important bit — the way that register access to this function will fail until the function is reenabled 😭 like, if you try to poke at its registers while it's disabled? nope. not happening. it's sleeping and you gotta wake it back up first (iykyk 👀).

ngl, don't forget that second part bestie — disabled means actually disabled, register access included 💀

💫 SEE ALSO 💫

naur because the cross-reference list goes OFF 👑 here's everyone in the friend group:

Kernel file ./drivers/mmc/core/sdio_io.c, plus:

like that is a whole squad, go read them, they're all friends of this page 🌈

okay that's the whole page, you ate that 🍓 and for the cute sign-off — this one lives out of the ./drivers/mmc/core directory, and the page is dated October 2026 🧚 see you next manpage bestie, mwah 💜

📦 where this page comes from