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Date: Sat, 26 Sep 2026 18:48:49 +0200
Message-Id: <DLPEHBOTZCCU.1DFPII93RC6LA@kernel.org>
Subject: Re: [PATCH v3 2/2] drm/tyr: safely write GpuInfo to userspace
Cc: "Alice Ryhl" <aliceryhl@google.com>, "Daniel Almeida"
 <daniel.almeida@collabora.com>, "David Airlie" <airlied@gmail.com>, "Simona
 Vetter" <simona@ffwll.ch>, "Miguel Ojeda" <ojeda@kernel.org>, "Boqun Feng"
 <boqun@kernel.org>, "Gary Guo" <gary@garyguo.net>,
 =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= <bjorn3_gh@protonmail.com>, "Benno Lossin"
 <lossin@kernel.org>, "Andreas Hindborg" <a.hindborg@kernel.org>, "Trevor
 Gross" <tmgross@umich.edu>, "Tamir Duberstein" <tamird@kernel.org>,
 "Alexandre Courbot" <acourbot@nvidia.com>, =?utf-8?q?Onur_=C3=96zkan?=
 <work@onurozkan.dev>, <dri-devel@lists.freedesktop.org>,
 <rust-for-linux@vger.kernel.org>, <linux-kernel@vger.kernel.org>
To: "Deborah Brouwer" <deborah.brouwer@collabora.com>
From: "Danilo Krummrich" <dakr@kernel.org>
References: <20260925-b4-gpu_info_intobytes-v3-0-e19bcb71980d@collabora.com>
 <20260925-b4-gpu_info_intobytes-v3-2-e19bcb71980d@collabora.com>
In-Reply-To: <20260925-b4-gpu_info_intobytes-v3-2-e19bcb71980d@collabora.com>

On Sat Sep 26, 2026 at 2:26 AM CEST, Deborah Brouwer wrote:
> @@ -54,7 +54,7 @@ pub(crate) fn dev_query(
>                      )
>                      .writer();
> =20
> -                    writer.write(&reg_data.gpu_info)?;
> +                    writer.write_slice(reg_data.gpu_info.as_bytes())?;

I think we eventually want write() to require T: IntoBytes + Immutable, so =
I'm
not sure there is much value going back and forth with this.