Re: [PATCH] mlx5: avoid integer overflow warning for large page size

[Arnd Bergmann]

On Thu, Jun 22, 2023, at 13:23, Maxim Mikityanskiy wrote:
> On Thu, 22 Jun 2023 at 12:15:02 +0200, Arnd Bergmann wrote:
>
> I recall you already sent a fix to silence this warning before:
>
> https://lore.kernel.org/netdev/20211015152056.2434853-1-arnd@xxxxxxxxxx/
>
> I prefer that old one, as it's more future-proof to cast to size_t here
> in place (chunk_size won't be bigger than size_t for sure). With your
> new patch, if chunk_size is ever changed from u16 to u32, it's likely
> that this place will be unnoticed, and a bug will be introduced.
>
>>  		mlx5_core_err(mdev, "XSK chunk size %u out of bounds [%u, %lu]\n", xsk->chunk_size,
>>  			      MLX5E_MIN_XSK_CHUNK_SIZE, PAGE_SIZE);

Indeed, I don't know why I no longer had the old patch in my randconfig
tree, I completely forgot about that. The old patch is also ok.

   Arnd