netdev - [PATCH net 8/8] net/mlx5e: Add a check for the return value from mlx5_port_set_eth

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Message-ID: <20240730061638.1831002-9-tariqt@nvidia.com>
Date: Tue, 30 Jul 2024 09:16:37 +0300
From: Tariq Toukan <tariqt@...dia.com>
To: "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>, Eric Dumazet <edumazet@...gle.com>
CC: <netdev@...r.kernel.org>, Saeed Mahameed <saeedm@...dia.com>, Gal Pressman
	<gal@...dia.com>, Leon Romanovsky <leonro@...dia.com>, Shahar Shitrit
	<shshitrit@...dia.com>, Carolina Jubran <cjubran@...dia.com>, Tariq Toukan
	<tariqt@...dia.com>
Subject: [PATCH net 8/8] net/mlx5e: Add a check for the return value from mlx5_port_set_eth_ptys

From: Shahar Shitrit <shshitrit@...dia.com>

Since the documentation for mlx5_toggle_port_link states that it should
only be used after setting the port register, we add a check for the
return value from mlx5_port_set_eth_ptys to ensure the register was
successfully set before calling it.

Fixes: 667daedaecd1 ("net/mlx5e: Toggle link only after modifying port parameters")
Signed-off-by: Shahar Shitrit <shshitrit@...dia.com>
Reviewed-by: Carolina Jubran <cjubran@...dia.com>
Signed-off-by: Tariq Toukan <tariqt@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index 00d5661dc62e..36845872ae94 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -1409,7 +1409,12 @@ static int mlx5e_ethtool_set_link_ksettings(struct mlx5e_priv *priv,
 	if (!an_changes && link_modes == eproto.admin)
 		goto out;
 
-	mlx5_port_set_eth_ptys(mdev, an_disable, link_modes, ext);
+	err = mlx5_port_set_eth_ptys(mdev, an_disable, link_modes, ext);
+	if (err) {
+		netdev_err(priv->netdev, "%s: failed to set ptys reg: %d\n", __func__, err);
+		goto out;
+	}
+
 	mlx5_toggle_port_link(mdev);
 
 out:
-- 
2.44.0