usb_fill_int_urb(9)

✨ NAME ✨

Okay bestie, this is the usb_fill_int_urb(9) page from the Kernel API Manual 🫶 — and yes, it’s the macro to help initialize a interrupt urb. That’s the whole assignment, no cap. 💅

💖 SYNOPSIS 💖

void usb_fill_int_urb (struct urb *urb , struct usb_device *dev ,
unsigned int pipe , void *transfer_buffer , int buffer_length ,
usb_complete_t complete_fn , void *context , int interval );

That’s the full signature — every pointer and int exactly where it belongs. ✨

🌸 ARGUMENTS 🌸

• urb — pointer to the urb to initialize. 🎀
• dev — pointer to the struct usb_device for this urb. 🦋
• pipe — the endpoint pipe. ✨
• transfer_buffer — pointer to the transfer buffer. The buffer must be suitable for DMA. 👀
• buffer_length — length of the transfer buffer. 🍓
• complete_fn — pointer to the usb_complete_t function. 💖
• context — what to set the urb context to. 🌸
• interval — what to set the urb interval to, encoded like the endpoint descriptor's bInterval value. 🧚

🦋 DESCRIPTION 🦋

It initializes a interrupt urb with the proper information needed to submit it to a device. Literally that’s the whole point: fill it in right so it can be submitted. ✨

Refer to usb_fill_control_urb for a description of the requirements for transfer_buffer. 👀

Note that High Speed and SuperSpeed(+) interrupt endpoints use a logarithmic encoding of the endpoint interval, and express polling intervals in microframes (eight per millisecond) rather than in frames (one per millisecond). 🧚✨

👑 SEE ALSO 👑

The whole see-also squad, no cap: Kernel file ./include/linux/usb.h — struct usb_host_endpoint(9), struct usb_interface(9), usb_set_intfdata(9), struct usb_interface_cache(9), struct usb_host_config(9), struct usb_device(9), usb_hub_for_each_child(9), usb_interface_claimed(9), usb_make_path(9), USB_DEVICE(9), USB_DEVICE_VER(9), USB_DEVICE_INTERFACE_CLASS(9), USB_DEVICE_INTERFACE_PROTOCOL(9), USB_DEVICE_INTERFACE_NUMBER(9), USB_DEVICE_INFO(9), USB_INTERFACE_INFO(9), USB_DEVICE_AND_INTERFACE_INFO(9), USB_VENDOR_AND_INTERFACE_INFO(9), struct usb_driver(9), struct usb_device_driver(9), struct usb_class_driver(9), module_usb_driver(9), struct urb(9), usb_fill_control_urb(9), usb_fill_bulk_urb(9), usb_urb_dir_in(9), usb_urb_dir_out(9), struct usb_sg_request(9). iykyk 💖

source/version: ./include/linux · October 2026 · page: usb_fill_int_urb(9) — byeee bestie, go initialize those interrupt urbs responsibly 💖✨