From: "Gary Guo" <gary@garyguo.net>
To: "Danilo Krummrich" <dakr@kernel.org>, <abdiel.janulgue@gmail.com>,
<daniel.almeida@collabora.com>, <robin.murphy@arm.com>,
<a.hindborg@kernel.org>, <gregkh@linuxfoundation.org>,
<rafael@kernel.org>, <aliceryhl@google.com>,
<acourbot@nvidia.com>, <ojeda@kernel.org>, <boqun@kernel.org>,
<gary@garyguo.net>, <bjorn3_gh@protonmail.com>,
<lossin@kernel.org>, <tmgross@umich.edu>, <tamird@kernel.org>,
<work@onurozkan.dev>, <mmaurer@google.com>
Cc: <driver-core@lists.linux.dev>, <nova-gpu@lists.linux.dev>,
<dri-devel@lists.freedesktop.org>, <linux-kernel@vger.kernel.org>,
<rust-for-linux@vger.kernel.org>
Subject: Re: [PATCH 2/4] rust: dma: tie CoherentHandle to the device's bound lifetime
Date: Thu, 03 Sep 2026 14:12:49 +0100 [thread overview]
Message-ID: <DL5PHF5BPGJN.86AWUD4D5BL3@garyguo.net> (raw)
In-Reply-To: <20260830193824.471089-3-dakr@kernel.org>
On Sun Aug 30, 2026 at 8:37 PM BST, Danilo Krummrich wrote:
> Add a lifetime parameter to CoherentHandle that ties the DMA allocation
> to the device's bound scope, ensuring it is freed before the device is
> unbound.
>
> DMA allocations carry device resources (e.g. IOMMU mappings) that must
> not outlive the device's bound lifetime. Without a lifetime parameter,
> there was no compile-time enforcement that a CoherentHandle is dropped
> before the device is unbound.
>
> Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Reviewed-by: Gary Guo <gary@garyguo.net>
> ---
> drivers/gpu/nova-core/fb.rs | 2 +-
> rust/kernel/dma.rs | 20 ++++++++++----------
> 2 files changed, 11 insertions(+), 11 deletions(-)
next prev parent reply other threads:[~2026-09-03 13:12 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-30 19:37 [PATCH 0/4] rust: dma: tie DMA allocations to the device's bound lifetime Danilo Krummrich
2026-08-30 19:37 ` [PATCH 1/4] rust: debugfs: drop 'static bound from ScopedDir file creation methods Danilo Krummrich
2026-08-30 19:53 ` sashiko-bot
2026-09-03 13:12 ` Gary Guo
2026-09-03 15:07 ` Danilo Krummrich
2026-09-03 15:16 ` Gary Guo
2026-08-30 19:37 ` [PATCH 2/4] rust: dma: tie CoherentHandle to the device's bound lifetime Danilo Krummrich
2026-09-03 13:12 ` Gary Guo [this message]
2026-08-30 19:37 ` [PATCH 3/4] samples: rust_dma: separate driver type from driver data Danilo Krummrich
2026-08-30 19:57 ` sashiko-bot
2026-09-03 13:13 ` Gary Guo
2026-08-30 19:37 ` [PATCH 4/4] rust: dma: tie Coherent and CoherentBox to the device's bound lifetime Danilo Krummrich
2026-08-30 19:47 ` sashiko-bot
2026-09-03 13:20 ` Gary Guo
2026-09-03 15:22 ` Danilo Krummrich
2026-09-03 15:42 ` Gary Guo
2026-09-06 15:37 ` [PATCH 0/4] rust: dma: tie DMA allocations " Danilo Krummrich
2026-09-07 21:06 ` Danilo Krummrich
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=DL5PHF5BPGJN.86AWUD4D5BL3@garyguo.net \
--to=gary@garyguo.net \
--cc=a.hindborg@kernel.org \
--cc=abdiel.janulgue@gmail.com \
--cc=acourbot@nvidia.com \
--cc=aliceryhl@google.com \
--cc=bjorn3_gh@protonmail.com \
--cc=boqun@kernel.org \
--cc=dakr@kernel.org \
--cc=daniel.almeida@collabora.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=driver-core@lists.linux.dev \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lossin@kernel.org \
--cc=mmaurer@google.com \
--cc=nova-gpu@lists.linux.dev \
--cc=ojeda@kernel.org \
--cc=rafael@kernel.org \
--cc=robin.murphy@arm.com \
--cc=rust-for-linux@vger.kernel.org \
--cc=tamird@kernel.org \
--cc=tmgross@umich.edu \
--cc=work@onurozkan.dev \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.