[dpdk-dev] [PATCH v2 1/2] net/mlx5: fix return value of start operation

[Olivier Matz <olivier.matz@6wind.com>]

On error, mlx5_dev_start() does not return a negative value
as it is supposed to do. The consequence is that the application
(ex: testpmd) does not notice that the port is not started
and begins the rxtx on an uninitialized port, which crashes.

Fixes: e1016cb73383 ("net/mlx5: fix Rx interrupts management")
Cc: stable@dpdk.org

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Acked-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
---
 drivers/net/mlx5/mlx5_trigger.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/mlx5/mlx5_trigger.c b/drivers/net/mlx5/mlx5_trigger.c
index 1a20967a2..44f702daa 100644
--- a/drivers/net/mlx5/mlx5_trigger.c
+++ b/drivers/net/mlx5/mlx5_trigger.c
@@ -166,6 +166,7 @@ mlx5_dev_start(struct rte_eth_dev *dev)
 		ERROR("%p: an error occurred while configuring control flows:"
 		      " %s",
 		      (void *)priv, strerror(err));
+		err = -err;
 		goto error;
 	}
 	err = priv_flow_start(priv, &priv->flows);
@@ -173,6 +174,7 @@ mlx5_dev_start(struct rte_eth_dev *dev)
 		ERROR("%p: an error occurred while configuring flows:"
 		      " %s",
 		      (void *)priv, strerror(err));
+		err = -err;
 		goto error;
 	}
 	err = priv_rx_intr_vec_enable(priv);
@@ -196,7 +198,7 @@ mlx5_dev_start(struct rte_eth_dev *dev)
 	priv_rxq_stop(priv);
 	priv_flow_delete_drop_queue(priv);
 	priv_unlock(priv);
-	return -err;
+	return err;
 }
 
 /**
-- 
2.11.0