linux-kernel - Re: [PATCH v6 6/6] rust: pci: add irq accessors

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Message-ID: <aGgbNyD3ryi3uxUZ@cassiopeiae>
Date: Fri, 4 Jul 2025 20:19:35 +0200
From: Danilo Krummrich <dakr@...nel.org>
To: Alice Ryhl <aliceryhl@...gle.com>
Cc: Daniel Almeida <daniel.almeida@...labora.com>,
	Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Trevor Gross <tmgross@...ch.edu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Benno Lossin <lossin@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Krzysztof Wilczyński <kwilczynski@...nel.org>,
	linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org,
	linux-pci@...r.kernel.org
Subject: Re: [PATCH v6 6/6] rust: pci: add irq accessors

On Fri, Jul 04, 2025 at 07:56:56AM +0000, Alice Ryhl wrote:
> On Thu, Jul 03, 2025 at 04:30:04PM -0300, Daniel Almeida wrote:
> > These accessors can be used to retrieve a irq::Registration or a
> > irq::ThreadedRegistration from a pci device. Alternatively, drivers can
> > retrieve an IrqRequest from a bound PCI device for later use.
> > 
> > These accessors ensure that only valid IRQ lines can ever be registered.
> > 
> > Signed-off-by: Daniel Almeida <daniel.almeida@...labora.com>
> 
> Same question as patch 5.

Here we don't do a lookup of the IRQ number by name, yet the API asks for the
name used for the IRQ registration, hence it needs a static lifetime, since the
pointer is directly stored in struct irqaction. It's accessed by trace events
for instance.

> With that answered:
> Reviewed-by: Alice Ryhl <aliceryhl@...gle.com>