[dpdk-dev] [PATCH] net/failsafe: fix Rx interrupt reinstallation

[Matan Azrad <matan@mellanox.com>]

Fail-safe dev_start() operation can be called by both the application
and the hot-plug alarm mechanism.

The installation of Rx interrupt are triggered from dev_start() in any
time it is called while actually the Rx interrupt should be installed
only by the application calls.

So, each plug-in event causes reinstallation which causes memory leak.

Trigger the Rx interrupt installation only for application calls.

Fixes: 9e0360aebf23 ("net/failsafe: register as Rx interrupt mode")

Signed-off-by: Matan Azrad <matan@mellanox.com>
---
 drivers/net/failsafe/failsafe_ops.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/failsafe/failsafe_ops.c b/drivers/net/failsafe/failsafe_ops.c
index 057e435..bbbd335 100644
--- a/drivers/net/failsafe/failsafe_ops.c
+++ b/drivers/net/failsafe/failsafe_ops.c
@@ -181,10 +181,12 @@
 	int ret;
 
 	fs_lock(dev, 0);
-	ret = failsafe_rx_intr_install(dev);
-	if (ret) {
-		fs_unlock(dev, 0);
-		return ret;
+	if (PRIV(dev)->alarm_lock == 0) {
+		ret = failsafe_rx_intr_install(dev);
+		if (ret) {
+			fs_unlock(dev, 0);
+			return ret;
+		}
 	}
 	FOREACH_SUBDEV(sdev, i, dev) {
 		if (sdev->state != DEV_ACTIVE)
-- 
1.9.5