From: Yunjian Wang <wangyunjian@huawei.com>
Date: Wed, 21 Oct 2020 11:19:23 +0000 (+0800)
Subject: eal: return errors on device event callback unregister
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=3f01891391a1f9320549598a5ffef29415a4a3d7;p=dpdk.git

eal: return errors on device event callback unregister

Fix return value, using -EAGAIN instead of 0 when the callback is busy
and using -ENOENT instead of 0 when the callback is not found.

Fixes: a753e53d517b ("eal: add device event monitor framework")

Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
Acked-by: Jeff Guo <jia.guo@intel.com>
Acked-by: David Marchand <david.marchand@redhat.com>
---

diff --git a/lib/librte_eal/common/eal_common_dev.c b/lib/librte_eal/common/eal_common_dev.c
index 363a2ca95e..d990bfd20d 100644
--- a/lib/librte_eal/common/eal_common_dev.c
+++ b/lib/librte_eal/common/eal_common_dev.c
@@ -530,9 +530,15 @@ rte_dev_event_callback_unregister(const char *device_name,
 			free(event_cb);
 			ret++;
 		} else {
-			continue;
+			ret = -EAGAIN;
+			break;
 		}
 	}
+
+	/* this callback is not be registered */
+	if (ret == 0)
+		ret = -ENOENT;
+
 	rte_spinlock_unlock(&dev_event_lock);
 	return ret;
 }