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Subject[PATCH -next 4/4] crypto: starfive: Use fallback for unaligned dma access
Date
Dma address mapping fails on unaligned scatterlist offset. Use sw
fallback for these cases.

Signed-off-by: Jia Jie Ho <jiajie.ho@starfivetech.com>
---
drivers/crypto/starfive/jh7110-aes.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/crypto/starfive/jh7110-aes.c b/drivers/crypto/starfive/jh7110-aes.c
index 9d6e2f936f03..86a1a1fa9f8f 100644
--- a/drivers/crypto/starfive/jh7110-aes.c
+++ b/drivers/crypto/starfive/jh7110-aes.c
@@ -314,7 +314,7 @@ static int starfive_aes_read_authtag(struct starfive_cryp_ctx *ctx)
cryp->total_in, cryp->authsize, 1);
} else {
if (crypto_memneq(cryp->tag_in, cryp->tag_out, cryp->authsize))
- return dev_err_probe(cryp->dev, -EBADMSG, "Failed tag verification\n");
+ return -EBADMSG;
}

return 0;
@@ -753,14 +753,16 @@ static bool starfive_aes_check_unaligned(struct starfive_cryp_dev *cryp,
int i;

for_each_sg(src, tsg, sg_nents(src), i)
- if (!IS_ALIGNED(tsg->length, AES_BLOCK_SIZE) &&
- !sg_is_last(tsg))
+ if (!IS_ALIGNED(tsg->offset, sizeof(u32)) ||
+ (!IS_ALIGNED(tsg->length, AES_BLOCK_SIZE) &&
+ !sg_is_last(tsg)))
return true;

if (src != dst)
for_each_sg(dst, tsg, sg_nents(dst), i)
- if (!IS_ALIGNED(tsg->length, AES_BLOCK_SIZE) &&
- !sg_is_last(tsg))
+ if (!IS_ALIGNED(tsg->offset, sizeof(u32)) ||
+ (!IS_ALIGNED(tsg->length, AES_BLOCK_SIZE) &&
+ !sg_is_last(tsg)))
return true;

return false;
--
2.40.1

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