pccard_validate_cis(9)

💅 pccard_validate_cis(9) — Kernel API Manual energy ✨

okay so bestie, welcome to the pccard_validate_cis glow-up page 💖 this one lives in the Kernel API Manual and it's basically the vibe-check function for your PCMCIA card's CIS. no cap.

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✨ NAME ✨

pccard_validate_cis — check whether card has a sensible CIS 🎀

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🌸 SYNOPSIS 🌸

int pccard_validate_cis (struct pcmcia_socket *s , unsigned int *info );

like, that's the whole mood. one function, two arguments, zero drama (hopefully) 💅

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🦋 ARGUMENTS 🦋

• s — the struct pcmcia_socket we are to check 👀 this is the thing getting the full inspection, main character energy fr fr
• info — returns the number of tuples in the (valid) CIS, or 0 ✨ so it's your little report card: a real number if everything's cute, a flat 0 if the CIS is giving red flags 💀

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🧚 DESCRIPTION 🧚

okay so what does it actually do? this function tries to determine if a card has a sensible CIS. that's the whole mission 🫶

and in info, it returns the number of tuples in the CIS, or 0 if the CIS looks bad. so 0 is the "not slaying" answer, iykyk 😭

the checks include (and yes, all of them matter):

• making sure several critical tuples are present and valid ✅
• seeing if the total number of tuples is reasonable 🧐
• looking for tuples that use reserved codes 🚩

and the function returns 0 on success 🌈 iconic behaviour, honestly.

ngl, if you get a 0 in info, that's the CIS failing its vibe check — not a win. read it carefully bestie 💀

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/pcmcia/cistpl.c
• destroy_cis_cache(9)

like, go read those too, they're part of the lore 📚✨

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and that's the page! 🎀 brought to you by the fine folks over at ./drivers/pcmcia, stamped October 2026 — mwah, love that for us 💖✨👑