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rust: regulator: use `CStr::as_char_ptr` 

Replace the use of `as_ptr` which works through `<CStr as
Deref<Target=&[u8]>::deref()` in preparation for replacing
`kernel::str::CStr` with `core::ffi::CStr` as the latter does not
implement `Deref<Target=&[u8]>`.

Signed-off-by: Tamir Duberstein <tamird@gmail.com>
Acked-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Daniel Almeida <daniel.almeida@collabora.com>
Link: https://patch.msgid.link/20251018-cstr-core-v18-13-9378a54385f8@gmail.com
[ Move safety comment below to support older Clippy. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Tamir Duberstein 2025-10-18 15:16:34 -04:00 committed by Miguel Ojeda
parent 3b46f65355
commit 9ce084e579
1 changed files with 8 additions and 5 deletions
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13
rust/kernel/regulator.rs
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@ -84,7 +84,7 @@ pub struct Error<State: RegulatorState> {
pub fn devm_enable(dev: &Device<Bound>, name: &CStr) -> Result { pub fn devm_enable(dev: &Device<Bound>, name: &CStr) -> Result {
// SAFETY: `dev` is a valid and bound device, while `name` is a valid C // SAFETY: `dev` is a valid and bound device, while `name` is a valid C
// string. // string.
to_result(unsafe { bindings::devm_regulator_get_enable(dev.as_raw(), name.as_ptr()) }) to_result(unsafe { bindings::devm_regulator_get_enable(dev.as_raw(), name.as_char_ptr()) })
} }
/// Same as [`devm_enable`], but calls `devm_regulator_get_enable_optional` /// Same as [`devm_enable`], but calls `devm_regulator_get_enable_optional`
@ -102,7 +102,9 @@ pub fn devm_enable(dev: &Device<Bound>, name: &CStr) -> Result {
pub fn devm_enable_optional(dev: &Device<Bound>, name: &CStr) -> Result { pub fn devm_enable_optional(dev: &Device<Bound>, name: &CStr) -> Result {
// SAFETY: `dev` is a valid and bound device, while `name` is a valid C // SAFETY: `dev` is a valid and bound device, while `name` is a valid C
// string. // string.
to_result(unsafe { bindings::devm_regulator_get_enable_optional(dev.as_raw(), name.as_ptr()) }) to_result(unsafe {
bindings::devm_regulator_get_enable_optional(dev.as_raw(), name.as_char_ptr())
})
} }
/// A `struct regulator` abstraction. /// A `struct regulator` abstraction.
@ -266,9 +268,10 @@ pub fn get_voltage(&self) -> Result<Voltage> {
} }
fn get_internal(dev: &Device, name: &CStr) -> Result<Regulator<T>> { fn get_internal(dev: &Device, name: &CStr) -> Result<Regulator<T>> {
// SAFETY: It is safe to call `regulator_get()`, on a device pointer let inner =
// received from the C code. // SAFETY: It is safe to call `regulator_get()`, on a device pointer
let inner = from_err_ptr(unsafe { bindings::regulator_get(dev.as_raw(), name.as_ptr()) })?; // received from the C code.
from_err_ptr(unsafe { bindings::regulator_get(dev.as_raw(), name.as_char_ptr()) })?;
// SAFETY: We can safely trust `inner` to be a pointer to a valid // SAFETY: We can safely trust `inner` to be a pointer to a valid
// regulator if `ERR_PTR` was not returned. // regulator if `ERR_PTR` was not returned.