netdev - [PATCH net-next 2/2] net/mlx5e: Update features on ring size change

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Message-ID: <20241024164134.299646-3-tariqt@nvidia.com>
Date: Thu, 24 Oct 2024 19:41:33 +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>, "Andrew
 Lunn" <andrew+netdev@...n.ch>
CC: <netdev@...r.kernel.org>, Saeed Mahameed <saeedm@...dia.com>, Gal Pressman
	<gal@...dia.com>, Leon Romanovsky <leonro@...dia.com>, Dragos Tatulea
	<dtatulea@...dia.com>, Tariq Toukan <tariqt@...dia.com>
Subject: [PATCH net-next 2/2] net/mlx5e: Update features on ring size change

From: Dragos Tatulea <dtatulea@...dia.com>

When the ring size changes successfully, trigger
netdev_update_features() to enable features in wanted state if
applicable.

An example of such scenario:
$ ip link set dev eth1 up
$ ethtool --set-ring eth1 rx 8192
$ ip link set dev eth1 mtu 9000
$ ethtool --features eth1 rx-gro-hw on --> fails
$ ethtool --set-ring eth1 rx 1024

With this patch, HW GRO will be turned on automatically because
it is set in the device's wanted_features.

Signed-off-by: Dragos Tatulea <dtatulea@...dia.com>
Reviewed-by: Gal Pressman <gal@...dia.com>
Signed-off-by: Tariq Toukan <tariqt@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index 1966736f98b4..cae39198b4db 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -406,6 +406,9 @@ int mlx5e_ethtool_set_ringparam(struct mlx5e_priv *priv,
 unlock:
 	mutex_unlock(&priv->state_lock);
 
+	if (!err)
+		netdev_update_features(priv->netdev);
+
 	return err;
 }
 
-- 
2.44.0