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crypto: atmel-aes - remove useless write in the Control Register 

As claimed by the datasheet, writing 0 into the Control Register has no
effet. So we remove this useless register access.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Cyrille Pitchen 2015-12-17 17:48:40 +01:00 committed by Herbert Xu
parent ccbf72980b
commit 794595d204
1 changed files with 1 additions and 2 deletions
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3
drivers/crypto/atmel-aes.c
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@ -511,7 +511,7 @@ static int atmel_aes_crypt_dma_start(struct atmel_aes_dev *dd)
static void atmel_aes_write_ctrl(struct atmel_aes_dev *dd, bool use_dma, static void atmel_aes_write_ctrl(struct atmel_aes_dev *dd, bool use_dma,
const u32 *iv) const u32 *iv)
{ {
u32 valcr = 0, valmr = 0; u32 valmr = 0;
/* MR register must be set before IV registers */ /* MR register must be set before IV registers */
if (dd->ctx->keylen == AES_KEYSIZE_128) if (dd->ctx->keylen == AES_KEYSIZE_128)
@ -554,7 +554,6 @@ static void atmel_aes_write_ctrl(struct atmel_aes_dev *dd, bool use_dma,
valmr |= AES_MR_SMOD_AUTO; valmr |= AES_MR_SMOD_AUTO;
} }
atmel_aes_write(dd, AES_CR, valcr);
atmel_aes_write(dd, AES_MR, valmr); atmel_aes_write(dd, AES_MR, valmr);
atmel_aes_write_n(dd, AES_KEYWR(0), dd->ctx->key, atmel_aes_write_n(dd, AES_KEYWR(0), dd->ctx->key,