4.16-stable review patch. If anyone has any objections, please let me know.
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From: Antoine Tenart antoine.tenart@bootlin.com
[ Upstream commit 95831ceafc0de7d94a5fe86ebb1c2042317cc2cd ]
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: 809778e02cd4 ("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 Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/crypto/inside-secure/safexcel.c | 9 +++++++++ 1 file changed, 9 insertions(+)
--- a/drivers/crypto/inside-secure/safexcel.c +++ b/drivers/crypto/inside-secure/safexcel.c @@ -490,6 +490,15 @@ handle_req: 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);