usb_function_activate(9)

🌸 NAME — usb_function_activate(9)

okay bestie, welcome to the Kernel API Manual entry for usb_function_activate(9) — this is the little activation gremlin that lets function and gadget enumeration happen 💅✨

usb_function_activate — allow function and gadget enumeration

✨ SYNOPSIS

int usb_function_activate (struct usb_function *function );

🎀 ARGUMENTS

• function — the function on which usb_function_activate was called 🫶

💖 DESCRIPTION

This one literally reverses the effect of usb_function_deactivate. So if no more functions are delaying their activation, the gadget driver will respond to host enumeration procedures — no cap 👑

It returns zero on success, else negative errno. That's the whole vibe check 😭

🦋 SEE ALSO

• Kernel file ./drivers/usb/gadget/composite.c
• struct usb_os_string(9)
• function_descriptors(9)
• next_desc(9)
• config_ep_by_speed_and_alt(9)
• config_ep_by_speed(9)
• usb_add_function(9)
• usb_function_deactivate(9)
• usb_interface_id(9)
• usb_func_wakeup(9)
• bos_desc(9)
• usb_add_config(9)
• usb_string_id(9)
• usb_string_ids_tab(9)
• usb_gstrings_attach(9)
• usb_string_ids_n(9)
• usb_composite_probe(9)
• usb_composite_unregister(9)
• usb_composite_setup_continue(9)

big kisses from ./drivers/usb/gadget, dated October 2026 — slay and read the source, bestie 💋🎀🌈