[dpdk-stable] patch 'net/mlx5: fix error number handling' has been queued to LTS release 17.11.4

[Yongseok Koh <yskoh@mellanox.com>]

Hi,

FYI, your patch has been queued to LTS release 17.11.4

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 07/28/18. So please
shout if anyone has objections.

Thanks.

Yongseok

---
>From 8e47ba2b073a2cb6eb87b97e81436346f729737c Mon Sep 17 00:00:00 2001
From: Yongseok Koh <yskoh@mellanox.com>
Date: Tue, 19 Jun 2018 16:13:13 -0700
Subject: [PATCH] net/mlx5: fix error number handling

[ upstream commit 5cffc8b28dc874d04df7675abf7187c271524f70 ]

rte_errno should be saved only if error has occurred because rte_errno
could have garbage value.

Fixes: a6d83b6a9209 ("net/mlx5: standardize on negative errno values")

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
---
 drivers/net/mlx5/mlx5_flow.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index 57b654c35..d261ba13b 100644
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -2991,15 +2991,17 @@ wrong_flow:
 		/* The flow does not match. */
 		continue;
 	}
-	ret = rte_errno; /* Save rte_errno before cleanup. */
 	if (flow)
 		mlx5_flow_list_destroy(dev, &priv->flows, flow);
 exit:
+	if (ret)
+		ret = rte_errno; /* Save rte_errno before cleanup. */
 	for (i = 0; i != hash_rxq_init_n; ++i) {
 		if (parser.queue[i].ibv_attr)
 			rte_free(parser.queue[i].ibv_attr);
 	}
-	rte_errno = ret; /* Restore rte_errno. */
+	if (ret)
+		rte_errno = ret; /* Restore rte_errno. */
 	return -rte_errno;
 }
 
-- 
2.11.0