linux-kernel - [PATCH 4.9 15/94] net/mlx5e: Use the correct pause values for ethtool advertising

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Date:   Mon,  5 Jun 2017 18:16:51 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Gal Pressman <galp@...lanox.com>,
        kernel-team@...com, Saeed Mahameed <saeedm@...lanox.com>
Subject: [PATCH 4.9 15/94] net/mlx5e: Use the correct pause values for ethtool advertising

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Gal Pressman <galp@...lanox.com>


[ Upstream commit b383b544f2666d67446b951a9a97af239dafed5d ]

Query the operational pause from firmware (PFCC register) instead of
always passing zeros.

Fixes: 665bc53969d7 ("net/mlx5e: Use new ethtool get/set link ksettings API")
Signed-off-by: Gal Pressman <galp@...lanox.com>
Cc: kernel-team@...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 |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -806,6 +806,8 @@ static int mlx5e_get_link_ksettings(stru
 	struct mlx5e_priv *priv    = netdev_priv(netdev);
 	struct mlx5_core_dev *mdev = priv->mdev;
 	u32 out[MLX5_ST_SZ_DW(ptys_reg)] = {0};
+	u32 rx_pause = 0;
+	u32 tx_pause = 0;
 	u32 eth_proto_cap;
 	u32 eth_proto_admin;
 	u32 eth_proto_lp;
@@ -828,11 +830,13 @@ static int mlx5e_get_link_ksettings(stru
 	an_disable_admin = MLX5_GET(ptys_reg, out, an_disable_admin);
 	an_status        = MLX5_GET(ptys_reg, out, an_status);
 
+	mlx5_query_port_pause(mdev, &rx_pause, &tx_pause);
+
 	ethtool_link_ksettings_zero_link_mode(link_ksettings, supported);
 	ethtool_link_ksettings_zero_link_mode(link_ksettings, advertising);
 
 	get_supported(eth_proto_cap, link_ksettings);
-	get_advertising(eth_proto_admin, 0, 0, link_ksettings);
+	get_advertising(eth_proto_admin, tx_pause, rx_pause, link_ksettings);
 	get_speed_duplex(netdev, eth_proto_oper, link_ksettings);
 
 	eth_proto_oper = eth_proto_oper ? eth_proto_oper : eth_proto_cap;