usb4_port_reset(9)

📦 version 7.3.1, in nixpkgs unstable

💅 usb4_port_reset ✨

okay so welcome to the usb4_port_reset(9) page from the Kernel API Manual bestie, we're literally about to reset a port and it's giving main character energy 🫶

🌸 NAME 🌸

usb4_port_reset — the one that issues a downstream port reset 💅

⭐ SYNOPSIS ⭐

int usb4_port_reset (struct tb_port *port );

that's it. that's the whole vibe. one argument, one int coming back at you 😌

🎀 ARGUMENTS 🎀

  • port — the USB4 port we're resetting, like she's THE port, the only one, the moment ✨

🦋 DESCRIPTION 🦋

So what does she actually do? She issues a downstream port reset to port. That's it, that's the whole lore. No cap, no extra steps, no dramatic monologue — you hand her a port, she resets it downstream, she leaves. Iconic behaviour honestly 👑

fr fr though, this is the function that does the resetting. don't overthink her, she's not that kind of girl 🙈

💖 RETURN 💖

  • 0 on success — slay, we ate, everything's fine 🌈
  • negative errno otherwise — aka it did NOT slay, and you should go look at that errno 😭

🔥 SEE ALSO 🔥

okay so this list is long long, buckle up bestie, we're doing the whole guest list 🎀

the usb4_switch_* girlies

the usb4_port_* besties 💜

the retimer crew 🧚

the usb3 bandwidth babes 🍓

the displayport divas 👑

and the pci port icons 💀

and that's the whole page bestie 🫶 this little love letter lives in the kernel file ./drivers/thunderbolt/usb4.c, the whole section is chilling under ./drivers/thunderbolt, it's dated October 2026, and yeah — she's usb4_port_reset(9), no notes, periodt 💖✨

📦 where this page comes from