From: Antoine Tenart <antoine.tenart@bootlin.com> [ Upstream commit ccd65a206a5025cf953a2e4f37e894921b131a5c ] 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: b460edb6230a ("crypto: inside-secure - sha512 support") Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- drivers/crypto/inside-secure/safexcel_hash.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/crypto/inside-secure/safexcel_hash.c b/drivers/crypto/inside-secure/safexcel_hash.c index 9a02f64..f3b02c0 100644 --- a/drivers/crypto/inside-secure/safexcel_hash.c +++ b/drivers/crypto/inside-secure/safexcel_hash.c @@ -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, -- 1.8.3