self_check_peb_ec_hdr(9)

📦 version 7.3.1, in nixpkgs unstable

💅 self_check_peb_ec_hdr — like, the Kernel API Manual (section 9) page you didn't know you needed 🎀

okay so bestie, gather round, because we're talking about self_check_peb_ec_hdr(9) — a tiny little kernel function that literally just checks an erase counter header for you. she's not flashy, she's not main character energy, but she's doing her job and honestly? we stan. ✨

🌸 NAME 🌸

self_check_peb_ec_hdr — check erase counter header.

yes. that's the whole thing. she checks the erase counter header. iconic of her, honestly. 💖

🦋 SYNOPSIS 🦋

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

that's the whole signature, no cap. copy it exactly, bestie — int, two args, semicolons and all. don't be out here retyping it from memory, that's how you get bugs. 🫶

⭐ ARGUMENTS ⭐

  • ubi — the UBI device description object, lowkey the whole vibe of the device you're poking at 🎀
  • pnum — the physical eraseblock number to check. yes, pnum = physical number. iykyk 💅

🔥 DESCRIPTION 🔥

so here's the tea: this function returns zero if the erase counter header is all right. that's it. zero means slay, we're good, everything's valid. 💚

but if it's not all right — or if an error occurred along the way — you get a negative error code. so basically: 0 = chef's kiss, negative = something's giving "problem". 😭 which specific negative code? that's on whatever went wrong, bestie, the page doesn't spill that tea.

ngl, this one's a quick vibe check and nothing more. don't go expecting it to fix anything, she just reports. 🙈

🌈 SEE ALSO 🌈

bestie the cross-references go crazy on this one, buckle up. all of these live in the kernel file ./drivers/mtd/ubi/io.c:

like, twenty entries. the whole friend group showed up. 🫶✨

and that's the whole page, bestie 💜 — brought to you by ./drivers/mtd/ubi, dated October 2026. periodt. 🎀💅

📦 where this page comes from