usb_add_gadget_udc_release(9)

💖 NAME 💖

okay so bestie, this is usb_add_gadget_udc_release(9) from the Kernel API Manual — and it adds a new gadget to the udc class driver list. literally its whole job. iconic. 💅

✨ SYNOPSIS ✨

int usb_add_gadget_udc_release (struct device *parent , struct
usb_gadget *gadget , void (*release)(struct device *dev) );

🎀 ARGUMENTS 🎀

• parent — the parent device to this udc. Usually the controller driver's device. (so like, the udc’s parent-device bestie, and normally that’s the controller driver’s device 💜)
• gadget — the gadget to be added to the list. (the actual gadget getting added to the list, no cap ✨)
• release — a gadget release function. (a release function for the gadget 🫶)

🌸 DESCRIPTION 🌸

Returns zero on success, negative errno otherwise. periodt. Calls the gadget release function in the latter case. 😭

bestie bestie bestie, the “latter case” is the negative errno case — so if it doesn’t return zero, it calls the gadget release function. 🌈

🦋 SEE ALSO 🦋

okay bestie, the whole friend group is here — every single SEE ALSO reference, no cap:

• 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_free_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_get_gadget_udc_name(9)
• usb_add_gadget_udc(9)
• usb_del_gadget(9)
• usb_del_gadget_udc(9)

💖 xoxo, from ./drivers/usb/gadget/udc, October 2026 — usb_add_gadget_udc_release(9) signing off 🎀