[dpdk-dev] [PATCH v4] eventdev/rx-adapter: fix segfault in queue conf get

[Ganapati Kundapura <ganapati.kundapura@intel.com>]

rte_event_eth_rx_adapter_queue_conf_get() segfaults if called
without queue added to the Rx adapter.

Added check to no queues in Rx adapter and error out on being
called with no queue in Rx adapter.

Added test case to call queue conf get without queues in
Rx adapter.

Fixes: b36879759b7f3ce ("eventdev/rx_adapter: support Rx queue config get")
Signed-off-by: Ganapati Kundapura <ganapati.kundapura@intel.com>

---
v4:
* Fixed checkpatch warning

v3:
* Added fixes line

v2:
* Corrected typo in the comment
---

diff --git a/app/test/test_event_eth_rx_adapter.c b/app/test/test_event_eth_rx_adapter.c
index 13664a3..d0dc552 100644
--- a/app/test/test_event_eth_rx_adapter.c
+++ b/app/test/test_event_eth_rx_adapter.c
@@ -751,20 +751,48 @@ static int
 adapter_queue_conf(void)
 {
 	int err;
-	struct rte_event_eth_rx_adapter_queue_conf queue_conf;
+	struct rte_event_eth_rx_adapter_queue_conf queue_conf = {0};
 
-	err = rte_event_eth_rx_adapter_queue_conf_get(TEST_INST_ID, TEST_DEV_ID,
+	/* Case 1: queue conf get without any queues in Rx adapter */
+	err = rte_event_eth_rx_adapter_queue_conf_get(TEST_INST_ID,
+						      TEST_ETHDEV_ID,
+						      0, &queue_conf);
+	TEST_ASSERT(err == -EINVAL, "Expected -EINVAL got %d", err);
+
+	/* Add queue to Rx adapter */
+	queue_conf.ev.queue_id = 0;
+	queue_conf.ev.sched_type = RTE_SCHED_TYPE_ATOMIC;
+	queue_conf.ev.priority = RTE_EVENT_DEV_PRIORITY_NORMAL;
+
+	err = rte_event_eth_rx_adapter_queue_add(TEST_INST_ID,
+						 TEST_ETHDEV_ID,
+						 0, &queue_conf);
+	TEST_ASSERT(err == 0, "Expected 0 got %d", err);
+
+	/* Case 2: queue conf get with queue added to Rx adapter */
+	err = rte_event_eth_rx_adapter_queue_conf_get(TEST_INST_ID,
+						      TEST_ETHDEV_ID,
 						      0, &queue_conf);
 	TEST_ASSERT(err == 0, "Expected 0 got %d", err);
 
-	err = rte_event_eth_rx_adapter_queue_conf_get(TEST_INST_ID, TEST_DEV_ID,
+	/* Case 3: queue conf get with invalid rx queue id */
+	err = rte_event_eth_rx_adapter_queue_conf_get(TEST_INST_ID,
+						      TEST_ETHDEV_ID,
 						      -1, &queue_conf);
 	TEST_ASSERT(err == -EINVAL, "Expected -EINVAL got %d", err);
 
-	err = rte_event_eth_rx_adapter_queue_conf_get(TEST_INST_ID, TEST_DEV_ID,
+	/* Case 4: queue conf get with NULL queue conf struct */
+	err = rte_event_eth_rx_adapter_queue_conf_get(TEST_INST_ID,
+						      TEST_ETHDEV_ID,
 						      0, NULL);
 	TEST_ASSERT(err == -EINVAL, "Expected -EINVAL got %d", err);
 
+	/* Delete queue from the Rx adapter */
+	err = rte_event_eth_rx_adapter_queue_del(TEST_INST_ID,
+						 TEST_ETHDEV_ID,
+						 0);
+	TEST_ASSERT(err == 0, "Expected 0 got %d", err);
+
 	return TEST_SUCCESS;
 }
 
diff --git a/lib/eventdev/rte_event_eth_rx_adapter.c b/lib/eventdev/rte_event_eth_rx_adapter.c
index 10491ca..2a84490 100644
--- a/lib/eventdev/rte_event_eth_rx_adapter.c
+++ b/lib/eventdev/rte_event_eth_rx_adapter.c
@@ -2844,12 +2844,13 @@ rte_event_eth_rx_adapter_queue_conf_get(uint8_t id,
 		return -EINVAL;
 
 	dev_info = &rx_adapter->eth_devices[eth_dev_id];
-	queue_info = &dev_info->rx_queue[rx_queue_id];
-	if (!queue_info->queue_enabled) {
+	if (dev_info->rx_queue == NULL ||
+	    !dev_info->rx_queue[rx_queue_id].queue_enabled) {
 		RTE_EDEV_LOG_ERR("Rx queue %u not added", rx_queue_id);
 		return -EINVAL;
 	}
 
+	queue_info = &dev_info->rx_queue[rx_queue_id];
 	qi_ev = (struct rte_event *)&queue_info->event;
 
 	memset(queue_conf, 0, sizeof(*queue_conf));
-- 
2.6.4