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    SubjectRe: [v5 PATCH 7/7] crypto: stm32 - Save and restore between each request
    On Tue, Mar 7, 2023 at 11:10 AM Herbert Xu <herbert@gondor.apana.org.au> wrote:
    > 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?

    Sadly this doesn't work.

    I tried increasing with one and even two orders of magnitude,
    but the timeouts still happen, usually two of them, sometimes
    one sometimes three, depending on randomness, as can be
    expected.

    I think you mentioned something about that we need to store
    the key in the state as well though?

    Yours,
    Linus Walleij

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