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

[Herbert Xu]

On Thu, Feb 26, 2026 at 06:24:40PM +0530, T Pratham wrote:
>
> +	src = dthe_aead_prep_src(req->src, req->assoclen, cryptlen,
> +				 src_assoc_padbuf, src_crypt_padbuf);
> +	if (IS_ERR(src)) {
> +		ret = PTR_ERR(src);
> +		goto aead_prep_src_err;
> +	}
> +
> +	if (req->assoclen % AES_BLOCK_SIZE)
> +		assoclen += AES_BLOCK_SIZE - (req->assoclen % AES_BLOCK_SIZE);
> +	if (cryptlen % AES_BLOCK_SIZE)
> +		cryptlen += AES_BLOCK_SIZE - (cryptlen % AES_BLOCK_SIZE);
> +
> +	src_nents = sg_nents_for_len(src, assoclen + cryptlen);
> +
> +	if (cryptlen != 0) {
> +		dst = dthe_aead_prep_dst(req->dst, req->assoclen, unpadded_cryptlen,
> +					 dst_crypt_padbuf);
> +		if (IS_ERR(dst)) {
> +			ret = PTR_ERR(dst);
> +			goto aead_prep_dst_err;
> +		}
> +
> +		dst_nents = sg_nents_for_len(dst, cryptlen);
> +	}
> +	/* Prep finished */

How does this handle the case where req->src == req->dst?

Thanks,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
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