Re: [PATCH 1/2] rust: device: add BoundInternal device context and InternalBoundContext trait

[Markus Probst <markus.probst@posteo.de>]

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On Sat, 2026-05-30 at 15:27 +0200, Danilo Krummrich wrote:
> Add a new BoundInternal device context type for cases where bus
> abstractions need access to internal device infrastructure, where
> CoreInternal would not be justified.
> 
> Introduce the InternalBoundContext marker trait, implemented by both
> CoreInternal and BoundInternal, to allow methods that require internal
> bus abstraction access to a bound device to be generic over both
> contexts.
> 
> The deref hierarchy now has two branches:
>   - CoreInternal<'a> => Core<'a> => Bound => Normal
>   - BoundInternal => Bound => Normal
> 
> Update impl_device_context_deref! and impl_device_context_into_aref!
> macros to emit the BoundInternal => Bound deref and the corresponding
> ARef conversion.
> 
> Signed-off-by: Danilo Krummrich <dakr@kernel.org>
> ---
> This is needed by both the serdev bus code [1] and the runtime PM series [2].
> 
> [1] https://lore.kernel.org/driver-core/DIW1B4FUIXO7.28GSUA0CEA4EV@kernel.org/
> [2] https://lore.kernel.org/driver-core/DIKIJ81CV55B.3TA7PV8N4BN0E@kernel.org/
> ---
>  rust/kernel/device.rs | 43 +++++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 41 insertions(+), 2 deletions(-)

Reviewed-By: Markus Probst <markus.probst@posteo.de>

Thanks
- Markus Probst

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