[PATCH v2 1/5] gpu: nova-core: use checked arithmetic in FWSEC firmware parsing

[Danilo Krummrich]

On Wed Jan 28, 2026 at 4:14 PM CET, Joel Fernandes wrote:
> On 1/28/2026 5:53 AM, Danilo Krummrich wrote:
>> On Mon Jan 26, 2026 at 9:23 PM CET, Joel Fernandes wrote:
>>> @@ -267,7 +264,12 @@ fn new_fwsec(dev: &Device<device::Bound>, bios: &Vbios, cmd: FwsecCommand) -> Re
>>>           let ucode = bios.fwsec_image().ucode(&desc)?;
>>>           let mut dma_object = DmaObject::from_data(dev, ucode)?;
>>>   
>>> -        let hdr_offset = usize::from_safe_cast(desc.imem_load_size() + desc.interface_offset());
>>> +        // Compute hdr_offset = imem_load_size + interface_offset.
>> 
>> I do get the idea behind those comments, but are we sure that's really a good
>> idea? How do we ensure to keep them up to date in case we have to change the
>> code?
>> 
>> If we really want this, I'd at least chose a common syntax, e.g.
>> 
>> 	// CALC: `imem_load_size + interface_offset`
>> 
>> without the variable name the resulting value is assigned to.
>> 
>> But I'd rather prefer to just drop those comments.
> The idea of adding these comments was to improve readability. However, I 
> can drop them in the v3, that's fine with me.

Yeah, that's why I wrote "I get the idea". :) But as I write above, I'm
concerned about the comments getting outdated or inconsistent over time.

Besides that, it more seems like something your favorite editor should help with
instead.

> Do you want me to wait for additional comments on this series, or should 
> I make the update and repost it?  Thanks,

As mentioned, I tend to think we should just drop them, but I'm happy to hear
some more opinions on this if any.