usb_of_get_interface_node(9)

✨ usb_of_get_interface_node ✨

okay so real talk bestie, this is a page from the Kernel API Manual and it's all about usb_of_get_interface_node — literally the glow-up that gets you a USB interface node 🦋 stick with me, it's short and it slays.

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🌸 SYNOPSIS 🌸

struct device_node * usb_of_get_interface_node (struct usb_device *udev
, u8 config , u8 ifnum );

that's the whole vibe check right there 💅

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🎀 ARGUMENTS 🎀

• udev — the USB device of the interface, like the main character of this whole operation 👑
• config — the configuration value, yes it's a u8, don't come for me 🙈
• ifnum — the interface number, iykyk 🧚

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💖 DESCRIPTION 💖

so what does it actually do? it looks up the node of a USB interface, given its USB device, its configuration value, and its interface number. that's it. that's the whole plot. no notes, ate and left no crumbs 🔥

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⭐ RETURN ⭐

if it finds the node: you get a pointer to it, with the refcount already incremented — so yeah, bestie, that ref is yours to deal with 🫶

if it doesn't find it: NULL. not me getting rejected 😭

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/usb/core/of.c
• usb_of_get_device_node(9)
• usb_of_has_combined_node(9)
• usb_of_get_connect_type(9)

go read those too, they're all in the same friend group 💜

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ngl this one's short but every single detail matters, so don't skip the refcount thing. literally.

and that's a wrap, bestie 🎀 this drop came from ./drivers/usb/core, dated October 2026, under the headline usb_of_get_interface_node(9) — periodt. 💅✨