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rust: auxiliary: implement parent() for Device<Bound>

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Take advantage of the fact that if the auxiliary device is bound the
parent is guaranteed to be bound as well and implement a separate
parent() method for auxiliary::Device<Bound>.

Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
This commit is contained in:
Danilo Krummrich
2025-10-21 00:34:28 +02:00
parent b69165a097
commit 675e514edd
1 changed files with 10 additions and 0 deletions
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10
rust/kernel/auxiliary.rs
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@@ -217,6 +217,16 @@ impl<Ctx: device::DeviceContext> Device<Ctx> {
} }
} }
impl Device<device::Bound> {
/// Returns a bound reference to the parent [`device::Device`].
pub fn parent(&self) -> &device::Device<device::Bound> {
let parent = (**self).parent();
// SAFETY: A bound auxiliary device always has a bound parent device.
unsafe { parent.as_bound() }
}
}
impl Device { impl Device {
/// Returns a reference to the parent [`device::Device`]. /// Returns a reference to the parent [`device::Device`].
pub fn parent(&self) -> &device::Device { pub fn parent(&self) -> &device::Device {