crypto: talitos - simplify hmac data size calculation

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@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 3 insertions, 5 deletions

diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c
index c70775fd3ce2..b1a651c61829 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);