ubi_detach_mtd_dev(9)

💅 ubi_detach_mtd_dev(9) — the Kernel API Manual glow-up ✨

okay so bestie, welcome to ubi_detach_mtd_dev, straight out of the Kernel API Manual (section 9, kernel-land, we love her) 💖

---

🎀 NAME 🎀

ubi_detach_mtd_dev — detach an MTD device. that's it, that's the whole vibe 💅

---

✨ SYNOPSIS ✨

int ubi_detach_mtd_dev (int ubi_num , int anyway );

yes bestie, exactly like that, spaces and all, do not come for me 🙈

---

🌸 ARGUMENTS 🌸

• ubi_num — the UBI device number you're detaching from. the main character of this whole operation 👑
• anyway — detach the MTD even if the device reference count is not zero. like, it's saying "idc, do it anyway" 😭

---

🦋 DESCRIPTION 🦋

okay so what this function does: it destroys a UBI device number ubi_num and detaches the underlying MTD device. that's the whole arc 🫶

return values, because we stay informed:

• returns zero in case of success — slay ⭐
• -EBUSY if the UBI device is busy and cannot be destroyed — she's booked and busy, literally 💀
• -EINVAL if it does not exist — ghosted, it was never there 🙈

⚠️ note bestie, do NOT skip this one: the invocations of this function have to be serialized by the ubi_devices_mutex. no cap. take the lock, it's giving basic hygiene 🔥

---

🌈 SEE ALSO 🌈

the whole friend group, all together now 🎀

• Kernel file ./drivers/mtd/ubi/build.c struct mtd_dev_param(9)
• ubi_volume_notify(9)
• ubi_notify_all(9)
• ubi_enumerate_volumes(9)
• ubi_get_device(9)
• ubi_put_device(9)
• ubi_get_by_major(9)
• ubi_major2num(9)
• kill_volumes(9)
• uif_init(9)
• uif_close(9)
• ubi_free_volumes_from(9)
• ubi_free_all_volumes(9)
• ubi_free_internal_volumes(9)
• io_init(9)
• autoresize(9)
• ubi_attach_mtd_dev(9)
• open_mtd_by_chdev(9)
• open_mtd_device(9)
• bytes_str_to_int(9)
• ubi_mtd_param_parse(9)

---

src: ./drivers/mtd/ubi · date: October 2026 · byeee bestie, go detach something responsibly 💅✨🎀