usb_ep_free_request(9)

okay bestie, welcome to usb_ep_free_request(9) from the Kernel API Manual ✨ this page is short, but it's literally about freeing a request object, so let's give it the attention it deserves 💅

🎀 NAME 🎀

usb_ep_free_request — frees a request object. that's the whole assignment: request object? freed. periodt 🫶

✨ SYNOPSIS ✨

void usb_ep_free_request (struct usb_ep *ep , struct usb_request *req );

🧚 ARGUMENTS 🧚

• ep — the endpoint associated with the request 🎯
• req — the request being freed, bye bestie 👋

💖 DESCRIPTION 💖

this is the undo of usb_ep_alloc_request — it reverses the effect of that function. like, you allocated the request, and now you're handing it back to the void 🫶

the caller guarantees the request is not queued, and that it will no longer be requeued (or otherwise used). no cap, that's the important part: the caller has to be absolutely sure req is done being used before this happens 👑

🚨 important bestie: the caller guarantees the request is not queued, and that it will no longer be requeued (or otherwise used). don't skip that vibe check 💀

🌈 SEE ALSO 🌈

go read these too, they're all connected:

• Kernel file ./drivers/usb/gadget/udc/core.c
• struct usb_udc(9)
• usb_ep_set_maxpacket_limit(9)
• usb_ep_enable(9)
• usb_ep_disable(9)
• usb_ep_alloc_request(9)
• usb_ep_queue(9)
• usb_ep_dequeue(9)
• usb_ep_set_halt(9)
• usb_ep_clear_halt(9)
• usb_ep_set_wedge(9)
• usb_ep_fifo_status(9)
• usb_ep_fifo_flush(9)
• usb_gadget_frame_number(9)
• usb_gadget_wakeup(9)
• usb_gadget_set_remote_wakeup(9)
• usb_gadget_set_selfpowered(9)
• usb_gadget_clear_selfpowered(9)
• usb_gadget_vbus_connect(9)
• usb_gadget_vbus_draw(9)
• usb_gadget_vbus_disconnect(9)
• usb_gadget_connect(9)
• usb_gadget_disconnect(9)
• usb_gadget_deactivate(9)
• usb_gadget_activate(9)
• usb_gadget_giveback_request(9)
• gadget_find_ep_by_name(9)
• usb_gadget_check_config(9)
• usb_udc_vbus_handler(9)
• usb_gadget_udc_reset(9)
• usb_gadget_udc_start_locked(9)
• usb_gadget_udc_stop_locked(9)
• usb_gadget_udc_set_speed(9)
• usb_gadget_enable_async_callbacks(9)
• usb_gadget_disable_async_callbacks(9)
• usb_udc_release(9)
• usb_initialize_gadget(9)
• usb_add_gadget(9)
• usb_add_gadget_udc_release(9)
• usb_get_gadget_udc_name(9)
• usb_add_gadget_udc(9)
• usb_del_gadget(9)
• usb_del_gadget_udc(9)

mwah 💋 — this one comes from ./drivers/usb/gadget/udc, dated October 2026. now go free that request and slay, bestie 🫶✨