From: Cyrille Pitchen Subject: [PATCH 09/24] crypto: atmel-aes: remove useless write in the Control Register Date: Thu, 17 Dec 2015 17:48:40 +0100 Message-ID: <1ace62ded06cbf4992e92aa3c3453b01054f56f4.1450366831.git.cyrille.pitchen@atmel.com> References: Mime-Version: 1.0 Content-Type: text/plain Cc: , , , Cyrille Pitchen To: , , Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org 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 --- drivers/crypto/atmel-aes.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/crypto/atmel-aes.c b/drivers/crypto/atmel-aes.c index 48407a7f6f61..f1ea9c893561 100644 --- a/drivers/crypto/atmel-aes.c +++ b/drivers/crypto/atmel-aes.c @@ -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, const u32 *iv) { - u32 valcr = 0, valmr = 0; + u32 valmr = 0; /* MR register must be set before IV registers */ 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; } - atmel_aes_write(dd, AES_CR, valcr); atmel_aes_write(dd, AES_MR, valmr); atmel_aes_write_n(dd, AES_KEYWR(0), dd->ctx->key, -- 1.8.2.2