[dpdk-dev] [PATCH v4 3/3] eal: fix a wrong returned value when callback exists

[wangyunjian <wangyunjian@huawei.com>]

From: Yunjian Wang <wangyunjian@huawei.com>

We should return an error value, when the callback is already exist.

Fixes: a753e53d517b ("eal: add device event monitor framework")
Cc: stable@dpdk.org

Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
---
 lib/librte_eal/common/eal_common_dev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/librte_eal/common/eal_common_dev.c b/lib/librte_eal/common/eal_common_dev.c
index d990bfd..2a097aa 100644
--- a/lib/librte_eal/common/eal_common_dev.c
+++ b/lib/librte_eal/common/eal_common_dev.c
@@ -431,7 +431,7 @@ static int cmp_dev_name(const struct rte_device *dev, const void *_name)
 				void *cb_arg)
 {
 	struct dev_event_callback *event_cb;
-	int ret;
+	int ret = 0;
 
 	if (!cb_fn)
 		return -EINVAL;
@@ -484,7 +484,7 @@ static int cmp_dev_name(const struct rte_device *dev, const void *_name)
 	}
 
 	rte_spinlock_unlock(&dev_event_lock);
-	return 0;
+	return ret;
 error:
 	free(event_cb);
 	rte_spinlock_unlock(&dev_event_lock);
-- 
1.8.3.1