[PATCH 1/3] crypto: talitos - simplify hmac data size calculation

[Kim Phillips]

don't do request->src vs. assoc pointer math - it's the same as adding
assoclen and ivsize (just with more effort).

Signed-off-by: Kim Phillips <kim.phillips at freescale.com>
---
 drivers/crypto/talitos.c |    8 +++-----
 1 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index c70775f..b1a651c 100644
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -970,7 +970,7 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
 	struct talitos_desc *desc = &edesc->desc;
 	unsigned int cryptlen = areq->cryptlen;
 	unsigned int authsize = ctx->authsize;
-	unsigned int ivsize;
+	unsigned int ivsize = crypto_aead_ivsize(aead);
 	int sg_count, ret;
 	int sg_link_tbl_len;
 
@@ -978,11 +978,9 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
 	map_single_talitos_ptr(dev, &desc->ptr[0], ctx->authkeylen, &ctx->key,
 			       0, DMA_TO_DEVICE);
 	/* hmac data */
-	map_single_talitos_ptr(dev, &desc->ptr[1], sg_virt(areq->src) -
-			       sg_virt(areq->assoc), sg_virt(areq->assoc), 0,
-			       DMA_TO_DEVICE);
+	map_single_talitos_ptr(dev, &desc->ptr[1], areq->assoclen + ivsize,
+			       sg_virt(areq->assoc), 0, DMA_TO_DEVICE);
 	/* cipher iv */
-	ivsize = crypto_aead_ivsize(aead);
 	map_single_talitos_ptr(dev, &desc->ptr[2], ivsize, giv ?: areq->iv, 0,
 			       DMA_TO_DEVICE);
 
-- 
1.6.3