USB_DEVICE_INTERFACE_CLASS(9)

💅 USB_DEVICE_INTERFACE_CLASS — like, the kernel API manual, bestie ✨

okay so we're in the Kernel API Manual and today's main character is USB_DEVICE_INTERFACE_CLASS(9). she's a macro. she's iconic. she describes a usb device with a specific interface class. let's get into it 🎀

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✨ NAME ✨

USB_DEVICE_INTERFACE_CLASS — describe a usb device with a specific interface class 🦋

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🌸 SYNOPSIS 🌸

USB_DEVICE_INTERFACE_CLASS (vend , prod , cl );

literally that's the whole vibe. three args, no notes. 💅

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🎀 ARGUMENTS 🎀

• vend — the 16 bit USB Vendor ID 👑 like who made this thing
• prod — the 16 bit USB Product ID 🍓 like which specific thing it is
• cl — the bInterfaceClass value 🧚 the actual interface class we're matching on

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💖 DESCRIPTION 💖

okay so picture this: this macro is used to create a struct usb_device_id that matches a specific interface class of devices. that's it, that's the whole job, and she does it flawlessly. no cap. 🔥

like, you're not matching the whole device here, you're matching specifically on the interface class — and honestly? that's the vibe check that matters. 🌈

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🫶 SEE ALSO 🫶

the whole friend group, fr fr — go say hi:

• 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_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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and that's the page!! mwah 💋 this lil beauty lives in ./include/linux and she's tagged October 2026 — so yeah, she's fresh, she's current, she's literally thriving. stan. 💜🦋✨