netdev - [PATCH net 1/6] net/mlx5: Lag, restore buckets number to default after hash LAG deactivation

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Message-ID: <20240411115444.374475-2-tariqt@nvidia.com>
Date: Thu, 11 Apr 2024 14:54:39 +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>, Shay Drory
	<shayd@...dia.com>, Maor Gottlieb <maorg@...dia.com>, Tariq Toukan
	<tariqt@...dia.com>
Subject: [PATCH net 1/6] net/mlx5: Lag, restore buckets number to default after hash LAG deactivation

From: Shay Drory <shayd@...dia.com>

The cited patch introduces the concept of buckets in LAG in hash mode.
However, the patch doesn't clear the number of buckets in the LAG
deactivation. This results in using the wrong number of buckets in
case user create a hash mode LAG and afterwards create a non-hash
mode LAG.

Hence, restore buckets number to default after hash mode LAG
deactivation.

Fixes: 352899f384d4 ("net/mlx5: Lag, use buckets in hash mode")
Signed-off-by: Shay Drory <shayd@...dia.com>
Reviewed-by: Maor Gottlieb <maorg@...dia.com>
Signed-off-by: Tariq Toukan <tariqt@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
index d14459e5c04f..69d482f7c5a2 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
@@ -703,8 +703,10 @@ int mlx5_deactivate_lag(struct mlx5_lag *ldev)
 		return err;
 	}
 
-	if (test_bit(MLX5_LAG_MODE_FLAG_HASH_BASED, &flags))
+	if (test_bit(MLX5_LAG_MODE_FLAG_HASH_BASED, &flags)) {
 		mlx5_lag_port_sel_destroy(ldev);
+		ldev->buckets = 1;
+	}
 	if (mlx5_lag_has_drop_rule(ldev))
 		mlx5_lag_drop_rule_cleanup(ldev);
 
-- 
2.44.0