dln2_transfer_rx(9)

📦 version 7.3.1, in nixpkgs unstable

💅 dln2_transfer_rx(9) — the Kernel API Manual, bestie edition 🎀

okay so real talk: this is a page straight out of the Kernel API Manual, and it's all about dln2_transfer_rx — literally the version of @dln2_transfer() where you don't need a TX buffer. no TX era ✨

🌸 NAME 🌸

dln2_transfer_rx — variant of @dln2_transfer() where TX buffer is not needed

like, the whole vibe is "receive only, no sending bag needed" 💅

✨ SYNOPSIS ✨

int dln2_transfer_rx (struct platform_device *pdev , u16 cmd , void
*ibuf , unsigned *ibuf_len );

that's the whole call, no cap 🫶

🦋 ARGUMENTS 🦋

so the manual is honestly kind of shy about these four, here's exactly what it gives us:

  • pdev — -- undescribed -- (the docs said nothing. iconic behaviour, honestly 😭 but the description below spills the tea)
  • cmd — -- undescribed -- (again, blank. the description has you covered tho 💖)
  • ibuf — -- undescribed -- (yes bestie, also blank — keep reading 👀)
  • ibuf_len — -- undescribed -- (blank here too, but the description explains it properly)
ngl the ARGUMENTS section is giving "left on read" 💀 — but every single detail is in DESCRIPTION, so don't skip it!

💖 DESCRIPTION 💖

here's the actual tea, laid out one arg at a time:

  • pdev — the sub-device which is issuing this transfer
  • cmd — the command to be sent to the device
  • ibuf — any data associated with the response will be copied here; it can be NULL if the user doesn't need the response data 🙈
  • ibuf_len — must be initialized to the input buffer size; it will be modified to indicate the actual data transferred ⭐

and the return value? slay:

return 0 for success, negative value for errors 💀✨

like yes, negative means bad vibes, 0 means we ate 🔥

👑 SEE ALSO 👑

Kernel file ./include/linux/mfd/dln2.h, plus these icons:

go read those too, iykyk 🧚

okay that's the whole page! 🌈 it lives over in ./include/linux/mfd, stamped October 2026 — so yeah, from the future, and still serving 💜 mwah, study hard bestie 🍓

📦 where this page comes from