usb_sg_cancel(9)

💅 usb_sg_cancel(9) — the Kernel API Manual tea 🎀

okay so bestie, welcome to usb_sg_cancel(9) — straight out of the Kernel API Manual, and yes she's iconic ✨

---

🌸 NAME 🌸

usb_sg_cancel — no cap, this is the function that literally stops scatter/gather i/o that was issued by usb_sg_wait() 🛑

---

✨ SYNOPSIS ✨

void usb_sg_cancel (struct usb_sg_request *io );

that's it, that's the whole vibe — one clean signature, zero drama 🫶

---

🦋 ARGUMENTS 🦋

• io — the request block 💖 and like, heads up, it has to be one that was initialized with usb_sg_init. don't just hand her a random struct, she will not be amused 😭

---

🔥 DESCRIPTION 🔥

So the way this works: usb_sg_cancel stops a request after it's already been started by usb_sg_wait. periodt 💅

She can also do the preemptive thing — if a request got initialized by usb_sg_init but hasn't started yet, usb_sg_cancel prevents it from ever starting, so that call just frees the resources that were allocated to the request 🧚✨ lowkey the cleanup queen fr fr.

---

👑 SEE ALSO 👑

Kernel file ./drivers/usb/core/message.c — and here's the whole friend group, all of them, every single one, no one left out 💜:

• usb_control_msg(9)
• usb_control_msg_send(9)
• usb_control_msg_recv(9)
• usb_interrupt_msg(9)
• usb_bulk_msg(9)
• usb_bulk_msg_killable(9)
• usb_sg_init(9)
• usb_sg_wait(9)
• usb_get_descriptor(9)
• usb_get_string(9)
• usb_string(9)
• usb_cache_string(9)
• usb_get_status(9)
• usb_clear_halt(9)
• usb_disable_endpoint(9)
• usb_reset_endpoint(9)
• usb_disable_interface(9)
• usb_disable_device(9)
• usb_enable_endpoint(9)
• usb_enable_interface(9)
• usb_set_interface(9)
• usb_reset_configuration(9)
• usb_set_wireless_status(9)
• usb_driver_set_configuration(9)
• cdc_parse_cdc_header(9)

---

and that's the page bestie!! 🌈 source situ is ./drivers/usb/core, dated October 2026, and it's all usb_sg_cancel(9) energy around here 🍓 mwah, go cancel some scatter/gather i/o responsibly 💖✨