netdev - [PATCH net-next 14/15] net/mlx5: E-switch, Don't update group if qos is not enabled

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Date:   Sat,  1 Oct 2022 21:56:31 -0700
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>,
        Dmytro Linkin <dlinkin@...dia.com>
Subject: [PATCH net-next 14/15] net/mlx5: E-switch, Don't update group if qos is not enabled

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

Currently, qos group will be updated and qos will be enabled when
unregistering devlink port. Actually no need to update group if qos
is not enabled.

Add a check to prevent unnecessary enabling and disabling qos for
every port.

Signed-off-by: Chris Mi <cmi@...dia.com>
Reviewed-by: Dmytro Linkin <dlinkin@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c
index 694c54066955..4f8a24d84a86 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/esw/qos.c
@@ -924,12 +924,16 @@ int mlx5_esw_qos_vport_update_group(struct mlx5_eswitch *esw,
 				    struct mlx5_esw_rate_group *group,
 				    struct netlink_ext_ack *extack)
 {
-	int err;
+	int err = 0;
 
 	mutex_lock(&esw->state_lock);
+	if (!vport->qos.enabled && !group)
+		goto unlock;
+
 	err = esw_qos_vport_enable(esw, vport, 0, 0, extack);
 	if (!err)
 		err = esw_qos_vport_update_group(esw, vport, group, extack);
+unlock:
 	mutex_unlock(&esw->state_lock);
 	return err;
 }
-- 
2.37.3