linux-kernel - Re: [PATCH v6 03/24] rust: dma: add dma_handle_with

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Message-ID: <aFl3sF_DbmJkFC-6@cassiopeiae>
Date: Mon, 23 Jun 2025 17:50:08 +0200
From: Danilo Krummrich <dakr@...nel.org>
To: Alexandre Courbot <acourbot@...dia.com>
Cc: 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>,
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	Benno Lossin <lossin@...nel.org>,
	John Hubbard <jhubbard@...dia.com>, Ben Skeggs <bskeggs@...dia.com>,
	Joel Fernandes <joelagnelf@...dia.com>,
	Timur Tabi <ttabi@...dia.com>, Alistair Popple <apopple@...dia.com>,
	linux-kernel@...r.kernel.org, rust-for-linux@...r.kernel.org,
	nouveau@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v6 03/24] rust: dma: add dma_handle_with_offset method to
 CoherentAllocation

On Thu, Jun 19, 2025 at 10:23:47PM +0900, Alexandre Courbot wrote:
> Sometimes one may want to obtain a DMA handle starting at a given
> offset. This can be done by adding said offset to the result of
> `dma_handle()`, but doing so on the client side carries the risk that
> the operation will go outside the bounds of the allocation.
> 
> Thus, add a `dma_handle_with_offset` method that adds the desired offset
> after checking that it is still valid.
> 
> Signed-off-by: Alexandre Courbot <acourbot@...dia.com>

Applied to alloc-next, thanks!