| Message ID | 20221227-ux500-stm32-hash-v1-5-b637ac4cda01@linaro.org (mailing list archive) |
|---|---|
| State | Changes Requested |
| Delegated to: | Herbert Xu |
| Headers | show |
| Series | crypto: stm32 hash - reuse for Ux500 | expand |
diff --git a/drivers/crypto/stm32/stm32-hash.c b/drivers/crypto/stm32/stm32-hash.c index 5f03be121787..92b2d55d6e93 100644 --- a/drivers/crypto/stm32/stm32-hash.c +++ b/drivers/crypto/stm32/stm32-hash.c @@ -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;
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 mostlt worked fine, but when I used the extensive tests and stress the hardware I ran into this problem. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> --- drivers/crypto/stm32/stm32-hash.c | 3 +++ 1 file changed, 3 insertions(+)