From c56c2e173773097a248fd3bace91ac8f6fc5386d Mon Sep 17 00:00:00 2001
From: Christophe Leroy <christophe.leroy@c-s.fr>
Date: Tue, 8 Jan 2019 06:56:46 +0000
Subject: [PATCH] crypto: talitos - reorder code in talitos_edesc_alloc()
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Git-commit: c56c2e173773097a248fd3bace91ac8f6fc5386d
References: git-fixes
Patch-mainline: v5.0-rc3
This patch moves the mapping of IV after the kmalloc(). This
avoids having to unmap in case kmalloc() fails.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>
Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
drivers/crypto/talitos.c | 26 +++++++-------------------
1 file changed, 7 insertions(+), 19 deletions(-)
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -1349,23 +1349,18 @@ static struct talitos_edesc *talitos_ede
struct talitos_private *priv = dev_get_drvdata(dev);
bool is_sec1 = has_ftr_sec1(priv);
int max_len = is_sec1 ? TALITOS1_MAX_DATA_LEN : TALITOS2_MAX_DATA_LEN;
- void *err;
if (cryptlen + authsize > max_len) {
dev_err(dev, "length exceeds h/w max limit\n");
return ERR_PTR(-EINVAL);
}
- if (ivsize)
- iv_dma = dma_map_single(dev, iv, ivsize, DMA_TO_DEVICE);
-
if (!dst || dst == src) {
src_len = assoclen + cryptlen + authsize;
src_nents = sg_nents_for_len(src, src_len);
if (src_nents < 0) {
dev_err(dev, "Invalid number of src SG.\n");
- err = ERR_PTR(-EINVAL);
- goto error_sg;
+ return ERR_PTR(-EINVAL);
}
src_nents = (src_nents == 1) ? 0 : src_nents;
dst_nents = dst ? src_nents : 0;
@@ -1375,16 +1370,14 @@ static struct talitos_edesc *talitos_ede
src_nents = sg_nents_for_len(src, src_len);
if (src_nents < 0) {
dev_err(dev, "Invalid number of src SG.\n");
- err = ERR_PTR(-EINVAL);
- goto error_sg;
+ return ERR_PTR(-EINVAL);
}
src_nents = (src_nents == 1) ? 0 : src_nents;
dst_len = assoclen + cryptlen + (encrypt ? authsize : 0);
dst_nents = sg_nents_for_len(dst, dst_len);
if (dst_nents < 0) {
dev_err(dev, "Invalid number of dst SG.\n");
- err = ERR_PTR(-EINVAL);
- goto error_sg;
+ return ERR_PTR(-EINVAL);
}
dst_nents = (dst_nents == 1) ? 0 : dst_nents;
}
@@ -1409,11 +1402,10 @@ static struct talitos_edesc *talitos_ede
}
edesc = kmalloc(alloc_len, GFP_DMA | flags);
- if (!edesc) {
- dev_err(dev, "could not allocate edescriptor\n");
- err = ERR_PTR(-ENOMEM);
- goto error_sg;
- }
+ if (!edesc)
+ return ERR_PTR(-ENOMEM);
+ if (ivsize)
+ iv_dma = dma_map_single(dev, iv, ivsize, DMA_TO_DEVICE);
edesc->src_nents = src_nents;
edesc->dst_nents = dst_nents;
@@ -1425,10 +1417,6 @@ static struct talitos_edesc *talitos_ede
DMA_BIDIRECTIONAL);
return edesc;
-error_sg:
- if (iv_dma)
- dma_unmap_single(dev, iv_dma, ivsize, DMA_TO_DEVICE);
- return err;
}
static struct talitos_edesc *aead_edesc_alloc(struct aead_request *areq, u8 *iv,