USB_INTERFACE_INFO(9)

💅 USB_INTERFACE_INFO 💅

okay so this is a page from the Kernel API Manual — yes bestie, the kernel has lore too — and today's main character is USB_INTERFACE_INFO. let's get into it 🎀

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✨ NAME ✨

USB_INTERFACE_INFO — the macro you use to describe a class of usb interfaces 🦋

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✨ SYNOPSIS ✨

USB_INTERFACE_INFO (cl , sc , pr );

like… that's it. three little args and you're iconic ✨

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✨ ARGUMENTS ✨

• cl — the bInterfaceClass value 💖
• sc — the bInterfaceSubClass value 🌸
• pr — the bInterfaceProtocol value 🫶

three values, three vibes, one macro. slay.

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✨ DESCRIPTION ✨

so what does it do? this macro creates a struct usb_device_id that matches a specific class of interfaces. that's the whole thing, no cap. it's giving "small but mighty" energy 👑

basically you hand it the class / subclass / protocol trio and it hands you back an id that goes "yes, this interface, this one right here, that's the one" 💅

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✨ SEE ALSO ✨

bestie there is a LOT of family here, buckle up 🍓 the kernel file for all this is ./include/linux/usb.h, and the whole squad is:

• 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_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)

go read them all, i'll wait 💜

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ngl this is a short one and that's the point — a tiny macro doing one job flawlessly. main character energy fr fr 🌈

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and that's the page!! sign-off time 🧚 from ./include/linux, dated October 2026, this was USB_INTERFACE_INFO(9) — mwah, go match some interfaces bestie 💅💖✨