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crypto: inside-secure - fix queued len computation

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This patch fixes the queued len computation, which could theoretically
be wrong if req->len[1] - req->processed[1] > 1. Be future-proof here,
and fix it.

Fixes: b460edb623 ("crypto: inside-secure - sha512 support")
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 2019-05-27 16:51:02 +02:00 committed by Herbert Xu
parent b926213d6f
commit ccd65a206a
1 changed files with 5 additions and 3 deletions
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8
drivers/crypto/inside-secure/safexcel_hash.c
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@ -50,10 +50,12 @@ struct safexcel_ahash_req {
static inline u64 safexcel_queued_len(struct safexcel_ahash_req *req)
{
if (req->len[1] > req->processed[1])
return 0xffffffff - (req->len[0] - req->processed[0]);
u64 len, processed;
return req->len[0] - req->processed[0];
len = (0xffffffff * req->len[1]) + req->len[0];
processed = (0xffffffff * req->processed[1]) + req->processed[0];
return len - processed;
}
static void safexcel_hash_token(struct safexcel_command_desc *cdesc,