netdev - [PATCH net 2/2] net/mlx5: Lag, Fix for loop when checking lag

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Message-Id: <20221129093006.378840-2-saeed@kernel.org>
Date:   Tue, 29 Nov 2022 01:30:06 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>
Cc:     Saeed Mahameed <saeedm@...dia.com>, netdev@...r.kernel.org,
        Tariq Toukan <tariqt@...dia.com>, Chris Mi <cmi@...dia.com>,
        Jacob Keller <jacob.e.keller@...el.com>
Subject: [PATCH net 2/2] net/mlx5: Lag, Fix for loop when checking lag

From: Chris Mi <cmi@...dia.com>

The cited commit adds a for loop to check if each port supports lag
or not. But dev is not initialized correctly. Fix it by initializing
dev for each iteration.

Fixes: e87c6a832f88 ("net/mlx5: E-switch, Fix duplicate lag creation")
Signed-off-by: Chris Mi <cmi@...dia.com>
Reported-by: Jacob Keller <jacob.e.keller@...el.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
index 4070dc1d17cb..32c3e0a649a7 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
@@ -700,11 +700,13 @@ static bool mlx5_lag_check_prereq(struct mlx5_lag *ldev)
 			return false;
 
 #ifdef CONFIG_MLX5_ESWITCH
-	dev = ldev->pf[MLX5_LAG_P1].dev;
-	for (i = 0; i  < ldev->ports; i++)
+	for (i = 0; i < ldev->ports; i++) {
+		dev = ldev->pf[i].dev;
 		if (mlx5_eswitch_num_vfs(dev->priv.eswitch) && !is_mdev_switchdev_mode(dev))
 			return false;
+	}
 
+	dev = ldev->pf[MLX5_LAG_P1].dev;
 	mode = mlx5_eswitch_mode(dev);
 	for (i = 0; i < ldev->ports; i++)
 		if (mlx5_eswitch_mode(ldev->pf[i].dev) != mode)
-- 
2.38.1