[PATCH] eal/linux: fix fail to stop device monitor error

[wenxuanx.wu@intel.com]

From: Wenxuan Wu <wenxuanx.wu@intel.com>

The ret value stands for whether the device monitor has been
successfully closed, and has nothing to do with
rte_intr_callback_unregister funcs once it return a value greater than 0
.So if the closure procedure has gone to the right exit point ,we should
set this value to 0.

Also ,the refmonitor has been carefully evaluted .at the beginning of
ret_dev_event_monitor_stop ,the value is 1, at the end of this func ,the
value is 0, it reveals that the monitor has been succefully closed.

Signed-off-by: Wenxuan Wu <wenxuanx.wu@intel.com>
---
 lib/eal/linux/eal_dev.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/eal/linux/eal_dev.c b/lib/eal/linux/eal_dev.c
index babd444d9d..8cf7ea5520 100644
--- a/lib/eal/linux/eal_dev.c
+++ b/lib/eal/linux/eal_dev.c
@@ -366,7 +366,7 @@ rte_dev_event_monitor_stop(void)
 
 	if (!monitor_refcount) {
 		RTE_LOG(ERR, EAL, "device event monitor already stopped\n");
-		
+
 		goto exit;
 	}
 
@@ -381,7 +381,7 @@ rte_dev_event_monitor_stop(void)
 		RTE_LOG(ERR, EAL, "fail to unregister uevent callback.\n");
 		goto exit;
 	}
-	
+
 	close(rte_intr_fd_get(intr_handle));
 	rte_intr_instance_free(intr_handle);
 	intr_handle = NULL;
-- 
2.25.1