[dpdk-dev] [PATCH] eventdev: fix control flow issues

[Abhinandan Gujjar]

This patch fixes null pointer dereference and control
flow issues reported in event crypto adapter by coverity

Coverity issue: 279439 Dereference null return value
Coverity issue: 279446 Logically dead code
Coverity issue: 279450 Logically dead code
Coverity issue: 279462 Logically dead code
Fixes: 7901eac3409 ("eventdev: add crypto adapter implementation")

Signed-off-by: Abhinandan Gujjar <abhinandan.guj...@intel.com>
---
 lib/librte_eventdev/rte_event_crypto_adapter.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/lib/librte_eventdev/rte_event_crypto_adapter.c 
b/lib/librte_eventdev/rte_event_crypto_adapter.c
index 11b28ca..5faf3c9 100644
--- a/lib/librte_eventdev/rte_event_crypto_adapter.c
+++ b/lib/librte_eventdev/rte_event_crypto_adapter.c
@@ -159,6 +159,9 @@ struct crypto_queue_pair_info {
        struct rte_event_port_conf *port_conf = arg;
        struct rte_event_crypto_adapter *adapter = eca_id_to_adapter(id);
 
+       if (adapter == NULL)
+               return -EINVAL;
+
        dev = &rte_eventdevs[adapter->eventdev_id];
        dev_conf = dev->data->dev_conf;
 
@@ -353,7 +356,7 @@ struct crypto_queue_pair_info {
                        cdev_id = m_data->request_info.cdev_id;
                        qp_id = m_data->request_info.queue_pair_id;
                        qp_info = &adapter->cdevs[cdev_id].qpairs[qp_id];
-                       if (qp_info == NULL) {
+                       if (!qp_info->qp_enabled) {
                                rte_pktmbuf_free(crypto_op->sym->m_src);
                                rte_crypto_op_free(crypto_op);
                                continue;
@@ -369,7 +372,7 @@ struct crypto_queue_pair_info {
                        cdev_id = m_data->request_info.cdev_id;
                        qp_id = m_data->request_info.queue_pair_id;
                        qp_info = &adapter->cdevs[cdev_id].qpairs[qp_id];
-                       if (qp_info == NULL) {
+                       if (!qp_info->qp_enabled) {
                                rte_pktmbuf_free(crypto_op->sym->m_src);
                                rte_crypto_op_free(crypto_op);
                                continue;
@@ -427,10 +430,9 @@ struct crypto_queue_pair_info {
        ret = 0;
        for (cdev_id = 0; cdev_id < num_cdev; cdev_id++) {
                curr_dev = &adapter->cdevs[cdev_id];
-               if (curr_dev == NULL)
-                       continue;
                dev = curr_dev->dev;
-
+               if (dev == NULL)
+                       continue;
                for (qp = 0; qp < dev->data->nb_queue_pairs; qp++) {
 
                        curr_queue = &curr_dev->qpairs[qp];
@@ -579,9 +581,9 @@ struct crypto_queue_pair_info {
                for (cdev_id = adapter->next_cdev_id;
                        cdev_id < num_cdev; cdev_id++) {
                        curr_dev = &adapter->cdevs[cdev_id];
-                       if (curr_dev == NULL)
-                               continue;
                        dev = curr_dev->dev;
+                       if (dev == NULL)
+                               continue;
                        dev_qps = dev->data->nb_queue_pairs;
 
                        for (qp = curr_dev->next_queue_pair_id;
-- 
1.9.1