On Sun Jul 27, 2025 at 6:48 PM JST, Rhys Lloyd wrote:
> Separating the header allows the use of `size_of::<PmuLookupTableHeader>()`
> instead of the magic number 4.
>
> Signed-off-by: Rhys Lloyd <krako...@gmail.com>
> ---
> drivers/gpu/nova-core/vbios.rs | 56 +++++++++++++++++++++-------------
> 1 file changed, 35 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/gpu/nova-core/vbios.rs b/drivers/gpu/nova-core/vbios.rs
> index 5b5d9f38cbb3..a77d7a4c8595 100644
> --- a/drivers/gpu/nova-core/vbios.rs
> +++ b/drivers/gpu/nova-core/vbios.rs
> @@ -889,6 +889,32 @@ fn try_from(base: BiosImageBase) -> Result<Self> {
> }
> }
>
> +/// The [`PmuLookupTableHeader`] structure is header information for
> [`PmuLookupTable`].
> +///
> +/// See the [`PmuLookupTable`] description for more information.
> +#[expect(dead_code)]
> +struct PmuLookupTableHeader {
> + version: u8,
> + header_len: u8,
> + entry_len: u8,
> + entry_count: u8,
> +}
> +
> +impl PmuLookupTableHeader {
> + fn new(data: &[u8]) -> Result<Self> {
> + if data.len() < core::mem::size_of::<Self>() {
We cannot rely on `size_of::<Self>` to be 4 if `Self` is not
`#[repr(C)]`. Since this is done in the second patch, I'd merge these
two into a single one for simplicity.
