ubi_get_device(9)

💖 NAME 💖

ubi_get_device — bestie, this is the one that gets you a UBI device 🫶

oh and real quick, before we dive in: this whole thing lives in the Kernel API Manual, section 9, and the page is literally called ubi_get_device(9). okay now we can yap ✨

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🌸 SYNOPSIS 🌸

struct ubi_device * ubi_get_device (int ubi_num );

like, that's the whole vibe. one function, one argument, returns a pointer to a struct ubi_device. slay 💅

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🎀 ARGUMENTS 🎀

• ubi_num — the UBI device number. literally just the number of the device you're asking about, no cap 🔢

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🦋 DESCRIPTION 🦋

okay so here's the tea, bestie 🍵

This function returns the UBI device description object for UBI device number ubi_num. that's the whole main character move.

and if the device doesn't exist? you get NULL. not an error code, not a dramatic crash, just NULL. so please, check for NULL, i'm begging 😭

now the important part — the way that this function increases the device reference count to prevent removal of the device. like it's holding the door open for you 🫶

in other words: the device cannot be removed if its reference count is not zero. periodt. so if you grabbed a device with this, you're lowkey responsible for it — that reference is yours to give back. don't just leave it hanging, that's not the vibe 💀

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⭐ SEE ALSO ⭐

• 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_put_device(9) ← this is the one that lets go, iykyk 👀
• 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)
• ubi_detach_mtd_dev(9)
• open_mtd_by_chdev(9)
• open_mtd_device(9)
• bytes_str_to_int(9)
• ubi_mtd_param_parse(9)

like, go read them all if you want the full lore drop 📚✨

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💡 friendly reminder: ubi_get_device takes a reference, ubi_put_device gives it back. keep them balanced or the device is never coming out of the group chat 🙈

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okay that's the whole page, you ate that 💅

this little masterpiece is served up from ./drivers/mtd/ubi, dated October 2026 — mwah, go forth and reference-count responsibly, bestie 💜🎀🦋