usb4_usb3_po...se_bandwidth(9)

📦 version 7.3.1, in nixpkgs unstable

✨ usb4_usb3_port_release_bandwidth 💅

okay so bestie, we're in the Kernel API Manual today and this one is genuinely a little icon — it's the function that gives bandwidth back. usb4_usb3_port_release_bandwidth 🎀

🌸 NAME 🌸

usb4_usb3_port_release_bandwidth — Release allocated USB3 bandwidth 💖

🦋 SYNOPSIS 🦋

int usb4_usb3_port_release_bandwidth (struct tb_port *port , int
*upstream_bw , int *downstream_bw );

🎀 ARGUMENTS 🎀

  • port — the USB3 adapter port. that's the main character here fr fr 🫶
  • upstream_bw — New allocated upstream bandwidth. yes it's a pointer, it's giving "I'll tell you the new number" energy ✨
  • downstream_bw — New allocated downstream bandwidth. same vibe, other direction 💫

🔥 DESCRIPTION 🔥

So what it does: it releases USB3 allocated bandwidth down to what is actually consumed. like, bestie, it stops hogging the whole lane when you're barely sipping 😭

The new bandwidth gets returned in upstream_bw and downstream_bw — both come back to you through those pointers. no cap, that's the whole point 👑

⭐ RETURN ⭐

0 on success, negative errno otherwise. that's it, that's the whole vibe check 💀

🌈 SEE ALSO 🌈

Kernel file ./drivers/thunderbolt/usb4.c, plus this absolutely iconic roster of neighbors (yes I'm listing every single one, we don't skip anybody in this group chat 💜):

and that's the page!! this little legend lives in ./drivers/thunderbolt and the docs were dated October 2026 — catch you in the next release, bestie, mwah 🍓🧚💅

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