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From: "Horia Geantă" <horia.geanta@nxp.com>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>,
	Dan Douglass <dan.douglass@nxp.com>,
	Tudor Ambarus <tudor-dan.ambarus@nxp.com>,
	"Cristian Stoica" <cristian.stoica@nxp.com>,
	<linux-crypto@vger.kernel.org>
Subject: [PATCH 04/12] crypto: caam - fix HW S/G in ablkcipher_giv_edesc_alloc()
Date: Fri, 10 Feb 2017 14:07:17 +0200	[thread overview]
Message-ID: <1486728445-13047-5-git-send-email-horia.geanta@nxp.com> (raw)
In-Reply-To: <1486728445-13047-1-git-send-email-horia.geanta@nxp.com>

HW S/G generation does not work properly when the following conditions
are met:
-src == dst
-src/dst is S/G
-IV is right before (contiguous with) the first src/dst S/G entry
since "iv_contig" is set to true (iv_contig is a misnomer here and
it actually refers to the whole output being contiguous)

Fix this by setting dst S/G nents equal to src S/G nents, instead of
leaving it set to init value (0).

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
---
 drivers/crypto/caam/caamalg.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/crypto/caam/caamalg.c b/drivers/crypto/caam/caamalg.c
index 662fe94cb2f8..05d4690351b9 100644
--- a/drivers/crypto/caam/caamalg.c
+++ b/drivers/crypto/caam/caamalg.c
@@ -1798,7 +1798,7 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc(
 	gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
 					  CRYPTO_TFM_REQ_MAY_SLEEP)) ?
 		       GFP_KERNEL : GFP_ATOMIC;
-	int src_nents, dst_nents = 0, sec4_sg_bytes;
+	int src_nents, dst_nents, sec4_sg_bytes;
 	struct ablkcipher_edesc *edesc;
 	dma_addr_t iv_dma = 0;
 	bool iv_contig = false;
@@ -1808,9 +1808,6 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc(
 
 	src_nents = sg_count(req->src, req->nbytes);
 
-	if (unlikely(req->dst != req->src))
-		dst_nents = sg_count(req->dst, req->nbytes);
-
 	if (likely(req->src == req->dst)) {
 		sgc = dma_map_sg(jrdev, req->src, src_nents ? : 1,
 				 DMA_BIDIRECTIONAL);
@@ -1818,6 +1815,8 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc(
 			dev_err(jrdev, "unable to map source\n");
 			return ERR_PTR(-ENOMEM);
 		}
+
+		dst_nents = src_nents;
 	} else {
 		sgc = dma_map_sg(jrdev, req->src, src_nents ? : 1,
 				 DMA_TO_DEVICE);
@@ -1826,6 +1825,7 @@ static struct ablkcipher_edesc *ablkcipher_giv_edesc_alloc(
 			return ERR_PTR(-ENOMEM);
 		}
 
+		dst_nents = sg_count(req->dst, req->nbytes);
 		sgc = dma_map_sg(jrdev, req->dst, dst_nents ? : 1,
 				 DMA_FROM_DEVICE);
 		if (unlikely(!sgc)) {
-- 
2.4.4

  parent reply	other threads:[~2017-02-10 12:08 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-10 12:07 [PATCH 00/12] crypto: caam - fixes Horia Geantă
2017-02-10 12:07 ` [PATCH 01/12] crypto: caam - don't include unneeded headers Horia Geantă
2017-02-10 12:07 ` [PATCH 02/12] crypto: caam - check return code of dma_set_mask_and_coherent() Horia Geantă
2017-02-10 12:07 ` [PATCH 03/12] crypto: caam - fix JR IO mapping if one fails Horia Geantă
2017-02-10 12:07 ` Horia Geantă [this message]
2017-02-10 12:07 ` [PATCH 05/12] crypto: caam - check sg_count() return value Horia Geantă
2017-02-10 12:07 ` [PATCH 06/12] crypto: caam - replace sg_count() with sg_nents_for_len() Horia Geantă
2017-02-10 12:07 ` [PATCH 07/12] crypto: caam - use dma_map_sg() return code Horia Geantă
2017-02-10 12:07 ` [PATCH 08/12] crypto: caam - don't dma_map key for hash algorithms Horia Geantă
2017-02-10 12:07 ` [PATCH 09/12] crypto: caam - fix DMA API leaks for multiple setkey() calls Horia Geantă
2017-02-10 12:07 ` [PATCH 10/12] crypto: caam - fix error path for ctx_dma mapping failure Horia Geantă
2017-02-10 12:07 ` [PATCH 11/12] crypto: caam - abstract ahash request double buffering Horia Geantă
2017-02-10 12:07 ` [PATCH 12/12] crypto: caam - fix state buffer DMA (un)mapping Horia Geantă
2017-02-15  5:33 ` [PATCH 00/12] crypto: caam - fixes Herbert Xu

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