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crypto: stm32_hash: fix issue when restarting computation

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While restarting a new hash computation, STR register
is not cleared. It needs to be written before each
computation.

Change-Id: If65902dd21f9c139ec5da3ca87721232f73710db
Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Signed-off-by: Yann Gautier <yann.gautier@st.com>
This commit is contained in:
Lionel Debieve 2020-01-31 16:17:37 +01:00 • committed by Yann Gautier
parent da9a837cad
commit 662c1f5c17
1 changed files with 3 additions and 1 deletions
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4
drivers/st/crypto/stm32_hash.c
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@ -1,5 +1,5 @@
/* /*
* Copyright (c) 2019, STMicroelectronics - All Rights Reserved * Copyright (c) 2019-2020, STMicroelectronics - All Rights Reserved
* *
* SPDX-License-Identifier: BSD-3-Clause * SPDX-License-Identifier: BSD-3-Clause
*/ */
@ -252,6 +252,8 @@ int stm32_hash_final(uint8_t *digest)
mmio_clrsetbits_32(hash_base() + HASH_STR, HASH_STR_NBLW_MASK, mmio_clrsetbits_32(hash_base() + HASH_STR, HASH_STR_NBLW_MASK,
8U * stm32_remain.length); 8U * stm32_remain.length);
zeromem(&stm32_remain, sizeof(stm32_remain)); zeromem(&stm32_remain, sizeof(stm32_remain));
} else {
mmio_clrbits_32(hash_base() + HASH_STR, HASH_STR_NBLW_MASK);
} }
mmio_setbits_32(hash_base() + HASH_STR, HASH_STR_DCAL); mmio_setbits_32(hash_base() + HASH_STR, HASH_STR_DCAL);