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crypto: stm32/hash - Wait for idle before final CPU xmit

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When calculating the hash using the CPU, right before the final
hash calculation, heavy testing on Ux500 reveals that it is wise
to wait for the hardware to go idle before calculating the
final hash.

The default test vectors mostly worked fine, but when I used the
extensive tests and stress the hardware I ran into this problem.

Acked-by: Lionel Debieve <lionel.debieve@foss.st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Linus Walleij 2023-01-25 01:23:09 +01:00 committed by Herbert Xu
parent 727f083ff4
commit 5a2d52b540
1 changed files with 3 additions and 0 deletions
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3
drivers/crypto/stm32/stm32-hash.c
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@ -362,6 +362,9 @@ static int stm32_hash_xmit_cpu(struct stm32_hash_dev *hdev,
stm32_hash_write(hdev, HASH_DIN, buffer[count]);
if (final) {
if (stm32_hash_wait_busy(hdev))
return -ETIMEDOUT;
stm32_hash_set_nblw(hdev, length);
reg = stm32_hash_read(hdev, HASH_STR);
reg |= HASH_STR_DCAL;