From: Dragos Tatulea <dtatulea@nvidia.com>
Date: Thu, 24 Oct 2024 16:41:32 +0000 (+0300)
Subject: net/mlx5e: Update features on MTU change
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=7999da12a6706f10ef47f2a4d34ebd5bc99a26de;p=users%2Fdwmw2%2Flinux.git

net/mlx5e: Update features on MTU change

When the MTU 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
$ ip link set dev eth1 mtu 7000

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@nvidia.com>
Reviewed-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20241024164134.299646-2-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
index ce94859014f87..235d003006261 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c
@@ -4557,6 +4557,10 @@ int mlx5e_change_mtu(struct net_device *netdev, int new_mtu,
 out:
 	WRITE_ONCE(netdev->mtu, params->sw_mtu);
 	mutex_unlock(&priv->state_lock);
+
+	if (!err)
+		netdev_update_features(netdev);
+
 	return err;
 }