Re: [PATCH v10 2/3] crypto: ti - Add support for AES-GCM in DTHEv2 driver

[Herbert Xu]

On Tue, Mar 10, 2026 at 10:35:15PM +0530, T Pratham wrote:
>
> What potential issue do you see? Both `dthe_aead_prep_src` and
> `dthe_prep_aead_dst` functions use `sg_split`, which anyway allocates a
> new scatterlist. Even if req->src == req->dst, the src and dst from here
> on will be different.

The copied SG list will still point to the original memroy, right?
In that case you will end up DMA mapping the same region twice, once
as input and once as output.  I don't think that's guaranteed to
work, as you're supposed to map it once as BIDIRECTIONAL.

Cheers,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
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