From: =?UTF-8?q?Horia=20Geant=C4=83?= <horia.geanta@nxp.com>
Date: Wed, 1 Nov 2017 09:13:10 +0200
Subject: crypto: caam - remove unneeded edesc zeroization
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Git-commit: f2ac67746534fab0cbc0bc29bfc3e507b1f58474
Patch-mainline: v4.15-rc1
References: fate#326534

Extended descriptor allocation has been changed by
commit dde20ae9d6383 ("crypto: caam - Change kmalloc to kzalloc to avoid residual data")
to provide zeroized memory, meaning we no longer have to sanitize
its members - edesc->src_nents and edesc->dst_dma.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
 drivers/crypto/caam/caamhash.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c
index 698580b60b2f..7b1167437b88 100644
--- a/drivers/crypto/caam/caamhash.c
+++ b/drivers/crypto/caam/caamhash.c
@@ -871,7 +871,6 @@ static int ahash_final_ctx(struct ahash_request *req)
 	desc = edesc->hw_desc;
 
 	edesc->sec4_sg_bytes = sec4_sg_bytes;
-	edesc->src_nents = 0;
 
 	ret = ctx_map_to_sec4_sg(desc, jrdev, state, ctx->ctx_len,
 				 edesc->sec4_sg, DMA_TO_DEVICE);
@@ -1123,7 +1122,6 @@ static int ahash_final_no_ctx(struct ahash_request *req)
 		dev_err(jrdev, "unable to map dst\n");
 		goto unmap;
 	}
-	edesc->src_nents = 0;
 
 #ifdef DEBUG
 	print_hex_dump(KERN_ERR, "jobdesc@"__stringify(__LINE__)": ",
@@ -1205,7 +1203,6 @@ static int ahash_update_no_ctx(struct ahash_request *req)
 
 		edesc->src_nents = src_nents;
 		edesc->sec4_sg_bytes = sec4_sg_bytes;
-		edesc->dst_dma = 0;
 
 		ret = buf_map_to_sec4_sg(jrdev, edesc->sec4_sg, state);
 		if (ret)
@@ -1417,7 +1414,6 @@ static int ahash_update_first(struct ahash_request *req)
 		}
 
 		edesc->src_nents = src_nents;
-		edesc->dst_dma = 0;
 
 		ret = ahash_edesc_add_src(ctx, edesc, req, mapped_nents, 0, 0,
 					  to_hash);
-- 
2.11.0