diff options
Diffstat (limited to 'rust/kernel')
| -rw-r--r-- | rust/kernel/faux.rs | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/rust/kernel/faux.rs b/rust/kernel/faux.rs index 41751403cd86..3277f35c3f79 100644 --- a/rust/kernel/faux.rs +++ b/rust/kernel/faux.rs @@ -23,11 +23,20 @@ pub struct Registration(NonNull<bindings::faux_device>); impl Registration { /// Create and register a new faux device with the given name. - pub fn new(name: &CStr) -> Result<Self> { + pub fn new(name: &CStr, parent: Option<&device::Device>) -> Result<Self> { // SAFETY: // - `name` is copied by this function into its own storage // - `faux_ops` is safe to leave NULL according to the C API - let dev = unsafe { bindings::faux_device_create(name.as_char_ptr(), null_mut(), null()) }; + // - `parent` can be either NULL or a pointer to a `struct device`, and `faux_device_create` + // will take a reference to `parent` using `device_add` - ensuring that it remains valid + // for the lifetime of the faux device. + let dev = unsafe { + bindings::faux_device_create( + name.as_char_ptr(), + parent.map_or(null_mut(), |p| p.as_raw()), + null(), + ) + }; // The above function will return either a valid device, or NULL on failure // INVARIANT: The device will remain registered until faux_device_destroy() is called, which |