Re: [PATCH v6 5/6] rust: platform: add irq accessors

[Danilo Krummrich <dakr@kernel.org>]

On Thu, Jul 03, 2025 at 04:30:03PM -0300, Daniel Almeida wrote:
> +impl Device<Bound> {
> +    /// Returns an [`IrqRequest`] for the IRQ at the given index, if any.
> +    pub fn request_irq_by_index(&self, index: u32) -> Result<IrqRequest<'_>> {
> +        // SAFETY: `self.as_raw` returns a valid pointer to a `struct platform_device`.
> +        let irq = unsafe { bindings::platform_get_irq(self.as_raw(), index) };
> +
> +        if irq < 0 {
> +            return Err(Error::from_errno(irq));
> +        }
> +
> +        // SAFETY: `irq` is guaranteed to be a valid IRQ number for `&self`.
> +        Ok(unsafe { IrqRequest::new(self.as_ref(), irq as u32) })
> +    }

Sorry that I didn't notice that before: Please just name the functions returning
an IrqRequest e.g. irq_by_index(), without the 'request' prefix. And instead put
the 'request' prefix in front of the methods that return a actual
irq::Registration.

This is more in line with the C functions being named request_irq() and
request_threaded_irq().