ubi_io_is_bad(9)

💅 ubi_io_is_bad(9) — from the Kernel API Manual, bestie 🎀

okay so picture this: we're in the kernel, we're vibing in ./drivers/mtd/ubi, and we need to know if a physical eraseblock is bad. yes that's the whole page. slay.

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✨ NAME ✨

ubi_io_is_bad — literally checks if a physical eraseblock is bad 💀

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🦋 SYNOPSIS 🦋

int ubi_io_is_bad (const struct ubi_device *ubi , int pnum );

like, that's it. that's the function. no cap. 🫶

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🌸 ARGUMENTS 🌸

• ubi — the UBI device description object, your main character fr ✨
• pnum — the physical eraseblock number you wanna check, iykyk 👑

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💖 DESCRIPTION 💖

so here's the tea, bestie: this function returns a positive number if the physical eraseblock is bad 😭, zero if it's not 💚, and a negative error code if an error occurred 🔥. three outcomes, one function, we love a versatile icon.

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🎀 SEE ALSO 🎀

all the siblings and cousins, they're all iconic, go read them:

• Kernel file ./drivers/mtd/ubi/io.c
• ubi_io_read(9)
• ubi_io_write(9)
• do_sync_erase(9)
• torture_peb(9)
• nor_erase_prepare(9)
• ubi_io_sync_erase(9)
• ubi_io_mark_bad(9)
• validate_ec_hdr(9)
• ubi_io_read_ec_hdr(9)
• ubi_io_write_ec_hdr(9)
• validate_vid_hdr(9)
• ubi_io_read_vid_hdr(9)
• ubi_io_write_vid_hdr(9)
• self_check_not_bad(9)
• self_check_ec_hdr(9)
• self_check_peb_ec_hdr(9)
• self_check_vid_hdr(9)
• self_check_peb_vid_hdr(9)
• self_check_write(9)
• ubi_self_check_all_ff(9)

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and that's the whole page bestie, no filler, only facts 💅

okay bye ily, this came from ./drivers/mtd/ubi, dated October 2026, and it's ubi_io_is_bad(9) — periodt. 🌈👑💜