Re: [PATCH v2 3/5] rust: pci: add a helper to query configuration space size

["Danilo Krummrich" <dakr@kernel.org>]

On Thu Oct 16, 2025 at 11:02 PM CEST, Zhi Wang wrote:
> diff --git a/rust/kernel/pci.rs b/rust/kernel/pci.rs
> index 77a8eb39ad32..34729c6f5665 100644
> --- a/rust/kernel/pci.rs
> +++ b/rust/kernel/pci.rs
> @@ -514,6 +514,12 @@ pub fn pci_class(&self) -> Class {
>          // SAFETY: `self.as_raw` is a valid pointer to a `struct pci_dev`.
>          Class::from_raw(unsafe { (*self.as_raw()).class })
>      }
> +
> +    /// Returns the size of configuration space.
> +    pub fn cfg_size(&self) -> i32 {
> +        // SAFETY: `self.as_raw` is a valid pointer to a `struct pci_dev`.
> +        unsafe { (*self.as_raw()).cfg_size }
> +    }
>  }

This should probably return an enum type:

	enum ConfigSize {
		Normal = 256,
		Extended = 4096,
	}