linux-kernel - [PATCH 4.4 76/78] net/mlx5e: Only support tx/rx pause setting for port owner

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Message-Id: <20190822171834.232407289@linuxfoundation.org>
Date:   Thu, 22 Aug 2019 10:19:20 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Huy Nguyen <huyn@...lanox.com>,
        Parav Pandit <parav@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [PATCH 4.4 76/78] net/mlx5e: Only support tx/rx pause setting for port owner

From: Huy Nguyen <huyn@...lanox.com>

[ Upstream commit 466df6eb4a9e813b3cfc674363316450c57a89c5 ]

Only support changing tx/rx pause frame setting if the net device
is the vport group manager.

Fixes: 3c2d18ef22df ("net/mlx5e: Support ethtool get/set_pauseparam")
Signed-off-by: Huy Nguyen <huyn@...lanox.com>
Reviewed-by: Parav Pandit <parav@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -855,6 +855,9 @@ static int mlx5e_set_pauseparam(struct n
 	struct mlx5_core_dev *mdev = priv->mdev;
 	int err;
 
+	if (!MLX5_CAP_GEN(mdev, vport_group_manager))
+		return -EOPNOTSUPP;
+
 	if (pauseparam->autoneg)
 		return -EINVAL;