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crypto: sun4i-ss - cannot use DMA is the request is 0 length

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Do not use DMA is the request is 0 length.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Tested-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Antoine Ténart 2017-06-01 21:38:56 +02:00 committed by Herbert Xu
parent 11be0107ab
commit 0f52ddaed6
1 changed files with 1 additions and 1 deletions
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2
drivers/crypto/sunxi-ss/sun4i-ss-hash.c
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@ -250,7 +250,7 @@ static int sun4i_hash(struct ahash_request *areq)
i = 0;
in_sg = sg_next(in_sg);
}
if (i == 1 && !op->len)
if (i == 1 && !op->len && areq->nbytes)
dev_dbg(ss->dev, "We can DMA\n");
i = 0;