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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>
This commit is contained in:
Kim Phillips 2009-08-13 11:49:06 +10:00 committed by Herbert Xu
parent 85a7f0ac53
commit e41256f139
1 changed files with 3 additions and 5 deletions
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8
drivers/crypto/talitos.c
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@ -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);