From: Fiona Trahe <fiona.trahe@intel.com>
Date: Tue, 29 Mar 2016 17:10:20 +0000 (+0100)
Subject: qat: fix crash when nothing to enqueue
X-Git-Tag: spdx-start~7126
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=2f481bda801703092363c94d6d78b6644fd2d1df;p=dpdk.git

qat: fix crash when nothing to enqueue

Crash seen in qat pmd when nb_ops=0 on rte_cryptodev_enqueue_burst() API

Signed-off-by: Fiona Trahe <fiona.trahe@intel.com>
---

diff --git a/drivers/crypto/qat/qat_crypto.c b/drivers/crypto/qat/qat_crypto.c
index 5c41a89817..9001558e2f 100644
--- a/drivers/crypto/qat/qat_crypto.c
+++ b/drivers/crypto/qat/qat_crypto.c
@@ -570,6 +570,9 @@ qat_pmd_enqueue_op_burst(void *qp, struct rte_crypto_op **ops,
 	register uint32_t tail;
 	int overflow;
 
+	if (unlikely(nb_ops == 0))
+		return 0;
+
 	/* read params used a lot in main loop into registers */
 	queue = &(tmp_qp->tx_q);
 	base_addr = (uint8_t *)queue->base_addr;