linux-kernel - [PATCH 07/24] staging: ccree: simplify expression with local var

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Date:   Tue, 12 Dec 2017 14:52:53 +0000
From:   Gilad Ben-Yossef <gilad@...yossef.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Ofir Drang <ofir.drang@....com>, linux-crypto@...r.kernel.org,
        driverdev-devel@...uxdriverproject.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 07/24] staging: ccree: simplify expression with local var

Simplify expression by using a local variable for better code
readability.

Signed-off-by: Gilad Ben-Yossef <gilad@...yossef.com>
---
 drivers/staging/ccree/ssi_buffer_mgr.c | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/staging/ccree/ssi_buffer_mgr.c b/drivers/staging/ccree/ssi_buffer_mgr.c
index 099d83d..490dd5a 100644
--- a/drivers/staging/ccree/ssi_buffer_mgr.c
+++ b/drivers/staging/ccree/ssi_buffer_mgr.c
@@ -917,6 +917,7 @@ static int cc_prepare_aead_data_mlli(struct ssi_drvdata *drvdata,
 	unsigned int authsize = areq_ctx->req_authsize;
 	int rc = 0, icv_nents;
 	struct device *dev = drvdata_to_dev(drvdata);
+	struct scatterlist *sg;
 
 	if (req->src == req->dst) {
 		/*INPLACE*/
@@ -955,12 +956,11 @@ static int cc_prepare_aead_data_mlli(struct ssi_drvdata *drvdata,
 					areq_ctx->mac_buf_dma_addr;
 			}
 		} else { /* Contig. ICV */
+			sg = &areq_ctx->src_sgl[areq_ctx->src.nents - 1];
 			/*Should hanlde if the sg is not contig.*/
-			areq_ctx->icv_dma_addr = sg_dma_address(
-				&areq_ctx->src_sgl[areq_ctx->src.nents - 1]) +
+			areq_ctx->icv_dma_addr = sg_dma_address(sg) +
 				(*src_last_bytes - authsize);
-			areq_ctx->icv_virt_addr = sg_virt(
-				&areq_ctx->src_sgl[areq_ctx->src.nents - 1]) +
+			areq_ctx->icv_virt_addr = sg_virt(sg) +
 				(*src_last_bytes - authsize);
 		}
 
@@ -993,12 +993,11 @@ static int cc_prepare_aead_data_mlli(struct ssi_drvdata *drvdata,
 			areq_ctx->icv_virt_addr = areq_ctx->backup_mac;
 
 		} else { /* Contig. ICV */
+			sg = &areq_ctx->src_sgl[areq_ctx->src.nents - 1];
 			/*Should hanlde if the sg is not contig.*/
-			areq_ctx->icv_dma_addr = sg_dma_address(
-				&areq_ctx->src_sgl[areq_ctx->src.nents - 1]) +
+			areq_ctx->icv_dma_addr = sg_dma_address(sg) +
 				(*src_last_bytes - authsize);
-			areq_ctx->icv_virt_addr = sg_virt(
-				&areq_ctx->src_sgl[areq_ctx->src.nents - 1]) +
+			areq_ctx->icv_virt_addr = sg_virt(sg) +
 				(*src_last_bytes - authsize);
 		}
 
@@ -1023,12 +1022,11 @@ static int cc_prepare_aead_data_mlli(struct ssi_drvdata *drvdata,
 		}
 
 		if (!areq_ctx->is_icv_fragmented) {
+			sg = &areq_ctx->dst_sgl[areq_ctx->dst.nents - 1];
 			/* Contig. ICV */
-			areq_ctx->icv_dma_addr = sg_dma_address(
-				&areq_ctx->dst_sgl[areq_ctx->dst.nents - 1]) +
+			areq_ctx->icv_dma_addr = sg_dma_address(sg) +
 				(*dst_last_bytes - authsize);
-			areq_ctx->icv_virt_addr = sg_virt(
-				&areq_ctx->dst_sgl[areq_ctx->dst.nents - 1]) +
+			areq_ctx->icv_virt_addr = sg_virt(sg) +
 				(*dst_last_bytes - authsize);
 		} else {
 			areq_ctx->icv_dma_addr = areq_ctx->mac_buf_dma_addr;
-- 
2.7.4