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crypto: inside-secure - fix the cache_len computation

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This patch fixes the cache length computation as cache_len could end up
being a negative value. The check between the queued size and the
block size is updated to reflect the caching mechanism which can cache
up to a full block size (included!).

Fixes: 809778e02c ("crypto: inside-secure - fix hash when length is a multiple of a block")
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Antoine Tenart
2018-02-13 09:26:53 +01:00
committed by Herbert Xu
parent c1a8fa6e24
commit 666a9c70b0
1 changed files with 1 additions and 1 deletions
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drivers/crypto/inside-secure/safexcel_hash.c
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@@ -184,7 +184,7 @@ static int safexcel_ahash_send_req(struct crypto_async_request *async, int ring,
int i, queued, len, cache_len, extra, n_cdesc = 0, ret = 0;
queued = len = req->len - req->processed;
if (queued < crypto_ahash_blocksize(ahash))
if (queued <= crypto_ahash_blocksize(ahash))
cache_len = queued;
else
cache_len = queued - areq->nbytes;