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crypto: inside-secure - do not process request if no command was issued

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This patch adds a check in the SafeXcel dequeue function, to avoid
processing request further if no hardware command was issued. This can
happen in certain cases where the ->send() function caches all the data
that would have been send.

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 09:26:54 +01:00 committed by Herbert Xu
parent 666a9c70b0
commit 95831ceafc
1 changed files with 9 additions and 0 deletions
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9
drivers/crypto/inside-secure/safexcel.c
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@ -490,6 +490,15 @@ void safexcel_dequeue(struct safexcel_crypto_priv *priv, int ring)
if (backlog)
backlog->complete(backlog, -EINPROGRESS);
/* In case the send() helper did not issue any command to push
* to the engine because the input data was cached, continue to
* dequeue other requests as this is valid and not an error.
*/
if (!commands && !results) {
kfree(request);
continue;
}
spin_lock_bh(&priv->ring[ring].egress_lock);
list_add_tail(&request->list, &priv->ring[ring].list);
spin_unlock_bh(&priv->ring[ring].egress_lock);