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| author | Gilad Ben-Yossef <gilad@benyossef.com> | 2019-04-18 16:38:58 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-04-25 15:38:15 +0800 |
| commit | c9877cbc83b6ee2f5b0006b3837a3c63569bc122 (patch) | |
| tree | 49d95d4ab4fd87cabfae1a328d7451afcf05d0ea | |
| parent | 6825cfd6d6f0054ddc35e220dadb3112350b05ae (diff) | |
| download | linux-stable-c9877cbc83b6ee2f5b0006b3837a3c63569bc122.tar.gz linux-stable-c9877cbc83b6ee2f5b0006b3837a3c63569bc122.tar.bz2 linux-stable-c9877cbc83b6ee2f5b0006b3837a3c63569bc122.zip | |
crypto: ccree - simplify AEAD ICV addr calculation
The function cc_prepare_aead_data_dlli() which calculates ICV addresses
was needlessly complicate it. This patch simplifies it without altering
its functionality.
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | drivers/crypto/ccree/cc_buffer_mgr.c | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/drivers/crypto/ccree/cc_buffer_mgr.c b/drivers/crypto/ccree/cc_buffer_mgr.c index 8269474cb9fa..8554cfb2963a 100644 --- a/drivers/crypto/ccree/cc_buffer_mgr.c +++ b/drivers/crypto/ccree/cc_buffer_mgr.c @@ -749,27 +749,21 @@ static void cc_prepare_aead_data_dlli(struct aead_request *req, struct aead_req_ctx *areq_ctx = aead_request_ctx(req); enum drv_crypto_direction direct = areq_ctx->gen_ctx.op_type; unsigned int authsize = areq_ctx->req_authsize; + struct scatterlist *sg; + ssize_t offset; areq_ctx->is_icv_fragmented = false; - if (req->src == req->dst) { - /*INPLACE*/ - areq_ctx->icv_dma_addr = sg_dma_address(areq_ctx->src_sgl) + - (*src_last_bytes - authsize); - areq_ctx->icv_virt_addr = sg_virt(areq_ctx->src_sgl) + - (*src_last_bytes - authsize); - } else if (direct == DRV_CRYPTO_DIRECTION_DECRYPT) { - /*NON-INPLACE and DECRYPT*/ - areq_ctx->icv_dma_addr = sg_dma_address(areq_ctx->src_sgl) + - (*src_last_bytes - authsize); - areq_ctx->icv_virt_addr = sg_virt(areq_ctx->src_sgl) + - (*src_last_bytes - authsize); + + if ((req->src == req->dst) || direct == DRV_CRYPTO_DIRECTION_DECRYPT) { + sg = areq_ctx->src_sgl; + offset = *src_last_bytes - authsize; } else { - /*NON-INPLACE and ENCRYPT*/ - areq_ctx->icv_dma_addr = sg_dma_address(areq_ctx->dst_sgl) + - (*dst_last_bytes - authsize); - areq_ctx->icv_virt_addr = sg_virt(areq_ctx->dst_sgl) + - (*dst_last_bytes - authsize); + sg = areq_ctx->dst_sgl; + offset = *dst_last_bytes - authsize; } + + areq_ctx->icv_dma_addr = sg_dma_address(sg) + offset; + areq_ctx->icv_virt_addr = sg_virt(sg) + offset; } static void cc_prepare_aead_data_mlli(struct cc_drvdata *drvdata, |