netdev - [net 03/10] net/mlx5e: Skip un-needed tx recover if interface state is down

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Date:   Tue,  9 Apr 2019 12:36:29 -0700
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, Eran Ben Elisha <eranbe@...lanox.com>,
        Tariq Toukan <tariqt@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [net 03/10] net/mlx5e: Skip un-needed tx recover if interface state is down

From: Eran Ben Elisha <eranbe@...lanox.com>

Skip recover operation if interface is in down state as TX objects are
not open. This fixes a bug were the recover flow re-opened TX objects
which were not opened before, leading to a possible memory leak at
driver unload.

Fixes: de8650a82071 ("net/mlx5e: Add tx reporter support")
Signed-off-by: Eran Ben Elisha <eranbe@...lanox.com>
Reviewed-by: Tariq Toukan <tariqt@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c
index 9d38e62cdf24..a85843e4e925 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c
@@ -186,12 +186,18 @@ static int mlx5e_tx_reporter_recover_from_ctx(struct mlx5e_tx_err_ctx *err_ctx)
 
 static int mlx5e_tx_reporter_recover_all(struct mlx5e_priv *priv)
 {
-	int err;
+	int err = 0;
 
 	rtnl_lock();
 	mutex_lock(&priv->state_lock);
+
+	if (!test_bit(MLX5E_STATE_OPENED, &priv->state))
+		goto out;
+
 	mlx5e_close_locked(priv->netdev);
 	err = mlx5e_open_locked(priv->netdev);
+
+out:
 	mutex_unlock(&priv->state_lock);
 	rtnl_unlock();
 
-- 
2.20.1