devm_mbox_c...ler_register(9)

📦 version 7.3.1, in nixpkgs unstable

🎀 devm_mbox_controller_register(9) 🎀

okay bestie, welcome to the Kernel API Manual — no cap, this is the actual manual name and we're rolling with it 💅 Today's main character is devm_mbox_controller_register, and honestly? She's a lifesaver. Let's get into it ✨

✨ NAME ✨

devm_mbox_controller_register — the managed version of mbox_controller_register(), aka the one that cleans up after itself so you don't have to 🫶

🌸 SYNOPSIS 🌸

int devm_mbox_controller_register (struct device *dev , struct
       mbox_controller *mbox );

🦋 ARGUMENTS 🦋

  • dev — the device that owns the mailbox controller you're registering. like, the whole reason this managed thing can even work 👑
  • mbox — the mailbox controller being registered. this is the actual star of the show 🍓

💖 DESCRIPTION 💖

so here's the vibe: this function adds a device-managed resource. what does that even mean? it means the mailbox controller — which gets registered using mbox_controller_register as part of this very function — will be unregistered along with the rest of the device-managed resources when things go sideways. and by "sideways" we mean:

  • driver probe failure 😭
  • driver removal 💀

either way, she's unregistering herself, periodt. no dangling controllers, no leaks, no mess. main character energy fr fr 🌈

and the return value? Returns 0 on success or a negative error code on failure. so if you get 0, slay, you're done. if it's negative, that's your sign to check yourself before you wreck yourself 🙈

🔥 SEE ALSO 🔥

the whole friend group lives in the kernel file ./drivers/mailbox/mailbox.c, and they're all iconic in their own right:

iykyk — go read them all, they ate 💅

and that's the whole page, bestie 🧚 this little gem comes to you straight from ./drivers/mailbox, dated October 2026, and you can find it filed under devm_mbox_controller_register(9) if you ever need to come back to it 💜 bye, ily, go register some mailboxes 🎀

📦 where this page comes from