usb_intf_get_dma_device(9)

📦 version 7.3.1, in nixpkgs unstable

💅 usb_intf_get_dma_device(9) — Kernel API Manual, bestie edition ✨

Okay so this is a page from the Kernel API Manual and honestly? It's short, it's sweet, it's giving "small but mighty" 🎀 Let's get into it.

🌸 NAME 🌸

usb_intf_get_dma_device — grab yourself a reference on the usb interface's DMA endpoint, no cap 🔥

✨ SYNOPSIS ✨

struct device * usb_intf_get_dma_device (struct usb_interface *intf );

💖 ARGUMENTS 💖

  • intf — the usb interface. That's it, that's the whole argument, she's lowkey simple 🫶

🦋 DESCRIPTION 🦋

So here's the tea ☕: a USB device cannot perform DMA operations by itself. Like, it just can't, that's not her job 💀 But — plot twist — many USB controllers can 👑

So when you call usb_intf_get_dma_device, it hands you back the DMA endpoint for the given USB interface, if any exists. Slay.

⚠️ Bestie, listen to me: the returned device structure must be released with put_device. Not optional. Don't leave her hanging, that's so rude 😭

Also see usb_get_dma_device 💜

🎀 RETURN 🎀

A reference to the usb interface's DMA endpoint 💫 — or NULL if none exists 🙈 (she simply isn't there, and that's okay).

🌈 SEE ALSO 🌈

Kernel file ./drivers/usb/core/usb.c along with this whole squad right here 👯‍♀️:

And that's the whole page, bestie 🍓 She lives in ./drivers/usb/core and this edition is dated October 2026 — periodt, go touch some DMA 💅🧚‍♀️

📦 where this page comes from