[dpdk-dev] [PATCH] eventdev: fix eventdev start return value

[Pavan Nikhilesh]

From: Pavan Nikhilesh Bhagavatula <pbhagavat...@caviumnetworks.com>

If eventdev has already started it should return -EBUSY instead of 0
when rte_event_dev_start is called.

Fixes: 4f0804bbdfb9 ("eventdev: implement the northbound APIs")

Signed-off-by: Pavan Nikhilesh <pbhagavat...@caviumnetworks.com>
---
 lib/librte_eventdev/rte_eventdev.c | 2 +-
 lib/librte_eventdev/rte_eventdev.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/librte_eventdev/rte_eventdev.c 
b/lib/librte_eventdev/rte_eventdev.c
index 20afc3f..61bb13f 100644
--- a/lib/librte_eventdev/rte_eventdev.c
+++ b/lib/librte_eventdev/rte_eventdev.c
@@ -1023,7 +1023,7 @@ rte_event_dev_start(uint8_t dev_id)
        if (dev->data->dev_started != 0) {
                RTE_EDEV_LOG_ERR("Device with dev_id=%" PRIu8 "already started",
                        dev_id);
-               return 0;
+               return -EBUSY;
        }

        diag = (*dev->dev_ops->dev_start)(dev);
diff --git a/lib/librte_eventdev/rte_eventdev.h 
b/lib/librte_eventdev/rte_eventdev.h
index a248fe9..c469b66 100644
--- a/lib/librte_eventdev/rte_eventdev.h
+++ b/lib/librte_eventdev/rte_eventdev.h
@@ -759,6 +759,7 @@ rte_event_port_count(uint8_t dev_id);
  *   - 0: Success, device started.
  *   - -ESTALE : Not all ports of the device are configured
  *   - -ENOLINK: Not all queues are linked, which could lead to deadlock.
+ *   - -EBUSY  : Device has already been started.
  */
 int
 rte_event_dev_start(uint8_t dev_id);
--
2.7.4