usb_set_intfdata(9)

From the Kernel API Manual, bestie: usb_set_intfdata(9) 💖

✨ NAME ✨

usb_set_intfdata — associate driver-specific data with an interface 🫶

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🌸 SYNOPSIS 🌸

Okay so the whole signature is literally:

void usb_set_intfdata (struct usb_interface *intf , void *data );

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🦋 ARGUMENTS 🦋

• intf — USB interface ✨
• data — driver data 💅

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🎀 DESCRIPTION 🎀

Drivers can use this function in their probe callbacks to associate driver-specific data with an interface — that’s the whole point, bestie 💖

Also lowkey important: there is generally no need to clear the driver-data pointer, even if some drivers do so for historical or implementation-specific reasons 🌈

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🔮 SEE ALSO 🔮

Kernel file ./include/linux/usb.h — and the whole extended universe, bestie:

• struct usb_host_endpoint(9)
• struct usb_interface(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_fill_int_urb(9)
• usb_urb_dir_in(9)
• usb_urb_dir_out(9)
• struct usb_sg_request(9)

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Source/version: ./include/linux · dated October 2026 · mwah, slay, bye bestie 💋👑