netdev - [PATCH net-next 03/16] net/mlx5e: Set tx reporter only on successful creation

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Date:   Sun,  7 Jul 2019 14:52:55 +0300
From:   Tariq Toukan <tariqt@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, Eran Ben Elisha <eranbe@...lanox.com>,
        ayal@...lanox.com, jiri@...lanox.com,
        Saeed Mahameed <saeedm@...lanox.com>, moshe@...lanox.com,
        Tariq Toukan <tariqt@...lanox.com>
Subject: [PATCH net-next 03/16] net/mlx5e: Set tx reporter only on successful creation

From: Aya Levin <ayal@...lanox.com>

When failing to create tx reporter, don't set the reporter's pointer.
Creating a reporter is not mandatory for driver load, avoid
garbage/error pointer.

Signed-off-by: Aya Levin <ayal@...lanox.com>
Acked-by: Jiri Pirko <jiri@...lanox.com>
Signed-off-by: Tariq Toukan <tariqt@...lanox.com>
---
 .../net/ethernet/mellanox/mlx5/core/en/reporter_tx.c  | 19 +++++++++++--------
 drivers/net/ethernet/mellanox/mlx5/core/en_main.c     |  2 +-
 2 files changed, 12 insertions(+), 9 deletions(-)

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 b2bc8d8ca80e..259811811e06 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_tx.c
@@ -117,7 +117,7 @@ static int mlx5_tx_health_report(struct devlink_health_reporter *tx_reporter,
 				 char *err_str,
 				 struct mlx5e_tx_err_ctx *err_ctx)
 {
-	if (IS_ERR_OR_NULL(tx_reporter)) {
+	if (!tx_reporter) {
 		netdev_err(err_ctx->sq->channel->netdev, err_str);
 		return err_ctx->recover(err_ctx->sq);
 	}
@@ -291,23 +291,26 @@ static int mlx5e_tx_reporter_diagnose(struct devlink_health_reporter *reporter,
 
 int mlx5e_tx_reporter_create(struct mlx5e_priv *priv)
 {
+	struct devlink_health_reporter *reporter;
 	struct mlx5_core_dev *mdev = priv->mdev;
 	struct devlink *devlink = priv_to_devlink(mdev);
 
-	priv->tx_reporter =
+	reporter =
 		devlink_health_reporter_create(devlink, &mlx5_tx_reporter_ops,
 					       MLX5_REPORTER_TX_GRACEFUL_PERIOD,
 					       true, priv);
-	if (IS_ERR(priv->tx_reporter))
-		netdev_warn(priv->netdev,
-			    "Failed to create tx reporter, err = %ld\n",
-			    PTR_ERR(priv->tx_reporter));
-	return PTR_ERR_OR_ZERO(priv->tx_reporter);
+	if (IS_ERR(reporter))
+		netdev_warn(priv->netdev, "Failed to create tx reporter, err = %ld\n",
+			    PTR_ERR(reporter));
+	else
+		priv->tx_reporter = reporter;
+
+	return PTR_ERR_OR_ZERO(reporter);
 }
 
 void mlx5e_tx_reporter_destroy(struct mlx5e_priv *priv)
 {
-	if (IS_ERR_OR_NULL(priv->tx_reporter))
+	if (!priv->tx_reporter)
 		return;
 
 	devlink_health_reporter_destroy(priv->tx_reporter);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index 83194d56434d..c5f11a05c34b 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -2320,7 +2320,7 @@ int mlx5e_open_channels(struct mlx5e_priv *priv,
 			goto err_close_channels;
 	}
 
-	if (!IS_ERR_OR_NULL(priv->tx_reporter))
+	if (priv->tx_reporter)
 		devlink_health_reporter_state_update(priv->tx_reporter,
 						     DEVLINK_HEALTH_REPORTER_STATE_HEALTHY);
 
-- 
1.8.3.1