doc_block_isbad(9)

💅 doc_block_isbad(9) — like, the Kernel API Manual but make it cute

okay so bestie, welcome to the kernel API manual corner of the group chat, where today's main character is doc_block_isbad(9) and honestly? she's a small function with a big job. let's get into it ✨

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🌸 NAME

doc_block_isbad — checks whether a block is good or not 🫶

like literally, that's the whole gig. is the block good? is it bad? she will tell you. no cap.

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🦋 SYNOPSIS

int doc_block_isbad (struct mtd_info *mtd , loff_t from );

that's her signature, bestie — an int coming right back atcha, taking a struct mtd_info *mtd and a loff_t from. iconic. 💅

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🎀 ARGUMENTS

• mtd — the device ✨ like, the actual MTD device we're poking at.
• from — the offset, which is how she finds the correct block 🌸 so she knows which block to vibe-check.

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🔥 DESCRIPTION

returns 1 if the block is bad, 0 if the block is good 💀

that's it. that's the function. binary queen behavior, honestly — she doesn't do nuance, she does 1 or 0 and she does it slayfully 👑

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🌈 SEE ALSO

if you're obsessed with this whole docg3 situation (and like, same), the kernel file lives at ./drivers/mtd/devices/docg3.c 🦋 and here's the whole friend group, all in (9) flavor:

• doc_delay(9)
• doc_read_data_area(9)
• doc_write_data_area(9)
• doc_set_reliable_mode(9)
• doc_set_asic_mode(9)
• doc_set_device_id(9)
• doc_set_extra_page_mode(9)
• doc_setup_addr_sector(9)
• doc_setup_writeaddr_sector(9)
• doc_read_seek(9)
• doc_write_seek(9)
• doc_read_page_ecc_init(9)
• doc_write_page_ecc_init(9)
• doc_ecc_disable(9)
• doc_hamming_ecc_init(9)
• doc_ecc_bch_fix_data(9)
• doc_read_page_prepare(9)
• doc_read_page_getbytes(9)
• doc_write_page_putbytes(9)
• doc_get_bch_hw_ecc(9)
• doc_page_finish(9)
• doc_read_page_finish(9)
• calc_block_sector(9)
• doc_read_oob(9)
• doc_get_erase_count(9)
• doc_get_op_status(9)
• doc_write_erase_wait_status(9)
• doc_erase_block(9)
• doc_erase(9)
• doc_write_page(9)
• doc_guess_autoecc(9)
• doc_fill_autooob(9)
• doc_backup_oob(9)
• doc_write_oob(9)
• doc_set_driver_info(9)
• doc_probe_device(9)
• doc_release_device(9)
• docg3_resume(9)
• docg3_suspend(9)
• docg3_probe(9)
• docg3_release(9)

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bestie reminder: 1 means bad block, 0 means good block. don't flip them. i'm trusting you. 🙈

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and that's the page! 🧚 this little gem comes to you from ./drivers/mtd/devices, dated October 2026, and it's your girl doc_block_isbad(9) signing off — stay good (not bad), stay slay, mwah 💖 🎀 🌟