> -----Original Message-----
> From: Horia Geantă <[email protected]>
> Sent: Friday, February 21, 2020 09:52
> To: Herbert Xu <[email protected]>
> Cc: David S. Miller <[email protected]>; Aymen Sghaier
> <[email protected]>; Valentin Ciocoi Radulescu
> <[email protected]>; [email protected]; dl-linux-imx
> <[email protected]>
> Subject: [PATCH] crypto: caam/qi2 - fix chacha20 data size error
>
> HW generates a Data Size error for chacha20 requests that are not
> a multiple of 64B, since algorithm state (AS) does not have
> the FINAL bit set.
>
> Since updating req->iv (for chaining) is not required,
> modify skcipher descriptors to set the FINAL bit for chacha20.
>
> [Note that for skcipher decryption we know that ctx1_iv_off is 0,
> which allows for an optimization by not checking algorithm type,
> since append_dec_op1() sets FINAL bit for all algorithms except AES.]
>
> Also drop the descriptor operations that save the IV.
> However, in order to keep code logic simple, things like
> S/G tables generation etc. are not touched.
>
> Cc: <[email protected]> # v5.3+
> Fixes: 334d37c9e263 ("crypto: caam - update IV using HW support")
> Signed-off-by: Horia Geantă <[email protected]>
Tested-by: Valentin Ciocoi Radulescu <[email protected]>