cdns3_gadget_ep0_queue(9)

📦 version 7.3.1, in nixpkgs unstable

💅 cdns3_gadget_ep0_queue — bestie's guide to endpoint zero

okay so this is a Kernel API Manual page, and today's main character is cdns3_gadget_ep0_queue, which is literally the function that transfers data on endpoint zero ✨ yes, that endpoint zero, the famous one 🙈

🎀 NAME 🎀

cdns3_gadget_ep0_queue — transfer data on endpoint zero. that's it, that's the whole vibe. it's giving "short but powerful" 💅

🦋 SYNOPSIS 🦋

here's the exact signature, no cap, copy it character for character:

int cdns3_gadget_ep0_queue (struct usb_ep *ep , struct usb_request
*request , gfp_t gfp_flags );

she returns an int, she takes three things, she's booked and busy 💖

🌸 ARGUMENTS 🌸

every single one, bestie, let's get into it:

  • ep — pointer to endpoint zero object 🫶 this is the ep-zero girlie herself
  • request — pointer to request object ✨ the actual ask, the whole point
  • gfp_flags — gfp flags 🧚 the allocation flags, yep, that's the whole description, don't @ me

🌈 DESCRIPTION 🌈

so what does she do?? she returns 0 on success and an error code elsewhere 💀 that's the entire description. short queen. iconic. periodt 🔥

ngl bestie the docs are lowkey sparse here — but what's written is what's true: 0 means slay, anything else means something went sideways 😭

👑 SEE ALSO 👑

okay this is the part where she introduces you to her whole friend group. every single one, in order, no skips:

eighteen friends, one function, one extremely stacked squad 💜 iykyk

and that's the page bestie 🎀 huge shoutout to the source: ./drivers/usb/cdns3, dated October 2026 — that's the version and the date, and honestly? they ate. go queue your ep0 transfers responsibly 🌟💖🦋

📦 where this page comes from