linux-kernel - Re: [PATCH] rust: pci: add HeaderType enum and header

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Message-ID: <CAGAB6648kOCF4GZV=wKUxEptzW_91BySPMqFSjE+L-TA3ufH-g@mail.gmail.com>
Date: Sun, 4 Jan 2026 00:39:24 +0900
From: 하승종 <engineer.jjhama@...il.com>
To: Danilo Krummrich <dakr@...nel.org>
Cc: SeungJong Ha via B4 Relay <devnull+engineer.jjhama.gmail.com@...nel.org>, 
	Bjorn Helgaas <bhelgaas@...gle.com>, Krzysztof Wilczyński <kwilczynski@...nel.org>, 
	Miguel Ojeda <ojeda@...nel.org>, Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
	Björn Roy Baron <bjorn3_gh@...tonmail.com>, 
	Benno Lossin <lossin@...nel.org>, Andreas Hindborg <a.hindborg@...nel.org>, 
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>, linux-kernel@...r.kernel.org, 
	linux-pci@...r.kernel.org, rust-for-linux@...r.kernel.org
Subject: Re: [PATCH] rust: pci: add HeaderType enum and header_type() helper

2026년 1월 4일 (일) AM 12:17, Danilo Krummrich <dakr@...nel.org>님이 작성:
>
> On Sat Jan 3, 2026 at 3:38 PM CET, SeungJong Ha via B4 Relay wrote:
> > This is my first patch to the Linux kernel, specifically targeting the
> > Rust PCI subsystem.
>
> Thanks for your contribution!
>
> > This patch introduces the HeaderType enum to represent PCI configuration
> > space header types (Normal and Bridge) and implements the header_type()
> > method in the Device struct.
>
> We usually do not add dead code in the kernel. Do you work on a user for this
> API?

Hi Danilo, Thanks for your feedback.

Yes, I am currently developing a Rust-based driver for nvme and ixgbe devices,
which requires identifying the header type to check compatibility on
initialization.
I sent this patch first as it provides a foundational API for the PCI
abstraction.

Best regards, SeungJong Ha