usb_hcd_unlink_urb_from_ep(9)

📦 version 7.3.1, in nixpkgs unstable

okay so bestie, we're deep in the kernel API manual right now, and this page is literally about usb_hcd_unlink_urb_from_ep 🦋 — yes the whole manual name is right there in the title, we're being professional about it, don't worry about it.

🌸 NAME 🌸

usb_hcd_unlink_urb_from_ep — remove an URB from its endpoint queue 💫

✨ SYNOPSIS ✨

void usb_hcd_unlink_urb_from_ep (struct usb_hcd *hcd , struct urb *urb
);

no cap, that's the whole signature. two pointers, no return value, she just does the thing 🎀

🫶 ARGUMENTS 🫶

  • hcd — the host controller that urb was submitted to. like, the specific one, okay? not vibes, an actual pointer 💅
  • urb — the URB that's being unlinked. that's the one we're yanking out of the queue 🧚

🔥 DESCRIPTION 🔥

okay so listen up — host controller drivers should call this routine before calling usb_hcd_giveback_urb. like, this is the order, it's not a suggestion, it's giving prerequisites 😭

the HCD's private spinlock must be held and interrupts must be disabled. the way that this is non-negotiable... yeah. do not skip that part, i'm begging 🙈

the actions carried out here are required for URB completion — so like, if you're wondering "can i just skip this and still complete my URB?", no bestie, that's the whole point of the function 💀

👑 SEE ALSO 👑

the kernel file lives at ./drivers/usb/core/hcd.c and honestly this whole friend group shows up together, so here's the full squad, no one left behind 🫶

and that's the page babes 💖 sign-off time: this one comes to you from ./drivers/usb/core, dated October 2026 — periodt, go hold that spinlock 🎀✨

📦 where this page comes from