From 603e989ebee21bfa9cddf8390d0515a07324edc8 Mon Sep 17 00:00:00 2001 From: Romain Perier Date: Fri, 22 Jul 2016 14:40:55 +0200 Subject: [PATCH] crypto: marvell - Don't chain at DMA level when backlog is disabled The flag CRYPTO_TFM_REQ_MAY_BACKLOG is optional and can be set from the user to put requests into the backlog queue when the main cryptographic queue is full. Before calling mv_cesa_tdma_chain we must check the value of the return status to be sure that the current request has been correctly queued or added to the backlog. Fixes: 85030c5168f1 ("crypto: marvell - Add support for chaining...") Signed-off-by: Romain Perier Acked-by: Boris Brezillon Signed-off-by: Herbert Xu --- drivers/crypto/marvell/cesa.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/crypto/marvell/cesa.c b/drivers/crypto/marvell/cesa.c index e373cc6557c6..d64af8625d7e 100644 --- a/drivers/crypto/marvell/cesa.c +++ b/drivers/crypto/marvell/cesa.c @@ -180,10 +180,11 @@ int mv_cesa_queue_req(struct crypto_async_request *req, struct mv_cesa_engine *engine = creq->engine; spin_lock_bh(&engine->lock); - if (mv_cesa_req_get_type(creq) == CESA_DMA_REQ) - mv_cesa_tdma_chain(engine, creq); - ret = crypto_enqueue_request(&engine->queue, req); + if ((mv_cesa_req_get_type(creq) == CESA_DMA_REQ) && + (ret == -EINPROGRESS || + (ret == -EBUSY && req->flags & CRYPTO_TFM_REQ_MAY_BACKLOG))) + mv_cesa_tdma_chain(engine, creq); spin_unlock_bh(&engine->lock); if (ret != -EINPROGRESS) -- 2.39.5