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rust: device: add device name method

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Add a name() method to the `Device` type, which returns a CStr that
contains the device name.

Signed-off-by: Timur Tabi <ttabi@nvidia.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Gary Guo <gary@garyguo.net>
Tested-by: John Hubbard <jhubbard@nvidia.com>
Tested-by: Eliot Courtney <ecourtney@nvidia.com>
Link: https://patch.msgid.link/20260319212658.2541610-2-ttabi@nvidia.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
This commit is contained in:
Timur Tabi 2026-03-19 16:26:53 -05:00 committed by Danilo Krummrich
parent 651c27d6a7
commit d35ae50c5f
2 changed files with 16 additions and 0 deletions
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5
rust/helpers/device.c
View File

@ -25,3 +25,8 @@ __rust_helper void rust_helper_dev_set_drvdata(struct device *dev, void *data)
{
dev_set_drvdata(dev, data);
}
__rust_helper const char *rust_helper_dev_name(const struct device *dev)
{
return dev_name(dev);
}

11
rust/kernel/device.rs
View File

@ -489,6 +489,17 @@ pub fn fwnode(&self) -> Option<&property::FwNode> {
// defined as a `#[repr(transparent)]` wrapper around `fwnode_handle`.
Some(unsafe { &*fwnode_handle.cast() })
}
/// Returns the name of the device.
///
/// This is the kobject name of the device, or its initial name if the kobject is not yet
/// available.
#[inline]
pub fn name(&self) -> &CStr {
// SAFETY: By its type invariant `self.as_raw()` is a valid pointer to a `struct device`.
// The returned string is valid for the lifetime of the device.
unsafe { CStr::from_char_ptr(bindings::dev_name(self.as_raw())) }
}
}
// SAFETY: `Device` is a transparent wrapper of a type that doesn't depend on `Device`'s generic