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[09/24] crypto: atmel-aes: remove useless write in the Control Register

Message ID 1ace62ded06cbf4992e92aa3c3453b01054f56f4.1450366831.git.cyrille.pitchen@atmel.com (mailing list archive)
State Accepted
Delegated to: Herbert Xu
Headers show

Commit Message

Cyrille Pitchen Dec. 17, 2015, 4:48 p.m. UTC 
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>
---
 drivers/crypto/atmel-aes.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
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Patch

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,