[v5 PATCH 7/7] crypto: stm32 - Save and restore between each request

[Herbert Xu]

On Mon, Mar 06, 2023 at 11:08:13AM +0100, Linus Walleij wrote:
>
> This partly works (after my folded in fix in patch 5)!
> 
> Clean SHA1 and SHA256 works flawlessly.
> HMAC still fails, but not until we start testing random vectors:
> 
> [    7.541954] alg: ahash: stm32-hmac-sha256 digest() failed on test
> vector "random: psize=0 ksize=80"; expected_error=0,
> actual_error=-110, cfg="random: may_sleep"
> [    7.567212] alg: self-tests for hmac(sha256) using
> stm32-hmac-sha256 failed (rc=-110)

So it's timing out.  I wonder if the timeout in stm32_hash_wait_busy
is long enough.  Perhaps try adding a zero so that the timeout becomes
100,000us and see if it still breaks?

Thanks,
-- 
Email: Herbert Xu <herbert at gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt