[PATCH] [crypto] geode: do not copy the IV too often

[Sebastian Siewior <linux-crypto@xxxxxxxxxxxxxxxx>]

There is no reason to keep the IV in the private structre. Instead keep
just a pointer to make the patch smaller :)
This also remove a few memcpy()s

Signed-off-by: Sebastian Siewior <sebastian@xxxxxxxxxxxxx>
---
 drivers/crypto/geode-aes.c |    6 ++----
 drivers/crypto/geode-aes.h |    2 +-
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/crypto/geode-aes.c b/drivers/crypto/geode-aes.c
index 0ca92d4..68be7d0 100644
--- a/drivers/crypto/geode-aes.c
+++ b/drivers/crypto/geode-aes.c
@@ -315,7 +315,7 @@ geode_cbc_decrypt(struct blkcipher_desc *desc,
 
 	blkcipher_walk_init(&walk, dst, src, nbytes);
 	err = blkcipher_walk_virt(desc, &walk);
-	memcpy(op->iv, walk.iv, AES_IV_LENGTH);
+	op->iv = walk.iv;
 
 	while((nbytes = walk.nbytes)) {
 		op->src = walk.src.virt.addr,
@@ -330,7 +330,6 @@ geode_cbc_decrypt(struct blkcipher_desc *desc,
 		err = blkcipher_walk_done(desc, &walk, nbytes);
 	}
 
-	memcpy(walk.iv, op->iv, AES_IV_LENGTH);
 	return err;
 }
 
@@ -348,7 +347,7 @@ geode_cbc_encrypt(struct blkcipher_desc *desc,
 
 	blkcipher_walk_init(&walk, dst, src, nbytes);
 	err = blkcipher_walk_virt(desc, &walk);
-	memcpy(op->iv, walk.iv, AES_IV_LENGTH);
+	op->iv = walk.iv;
 
 	while((nbytes = walk.nbytes)) {
 		op->src = walk.src.virt.addr,
@@ -362,7 +361,6 @@ geode_cbc_encrypt(struct blkcipher_desc *desc,
 		err = blkcipher_walk_done(desc, &walk, nbytes);
 	}
 
-	memcpy(walk.iv, op->iv, AES_IV_LENGTH);
 	return err;
 }
 
diff --git a/drivers/crypto/geode-aes.h b/drivers/crypto/geode-aes.h
index 14cc763..f1855b5 100644
--- a/drivers/crypto/geode-aes.h
+++ b/drivers/crypto/geode-aes.h
@@ -65,7 +65,7 @@ struct geode_aes_op {
 	int len;
 
 	u8 key[AES_KEY_LENGTH];
-	u8 iv[AES_IV_LENGTH];
+	u8 *iv;
 
 	union {
 		struct crypto_blkcipher *blk;
-- 
1.5.3.4

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