linux-kernel - [PATCH 4.17 09/31] net/mlx5e: Set port trust mode to PCP as default

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Date:   Sat,  4 Aug 2018 11:00:44 +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, Or Gerlitz <ogerlitz@...lanox.com>,
        Parav Pandit <parav@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [PATCH 4.17 09/31] net/mlx5e: Set port trust mode to PCP as default

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

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

From: Or Gerlitz <ogerlitz@...lanox.com>

[ Upstream commit 2e8e70d249e8c5c79bf88bbb36bb68154ab15471 ]

The hairpin offload code has dependency on the trust mode being PCP.

Hence we should set PCP as the default for handling cases where we are
disallowed to read the trust mode from the FW, or failed to initialize it.

Fixes: 106be53b6b0a ('net/mlx5e: Set per priority hairpin pairs')
Signed-off-by: Or Gerlitz <ogerlitz@...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_dcbnl.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
@@ -1057,6 +1057,8 @@ static int mlx5e_trust_initialize(struct
 	struct mlx5_core_dev *mdev = priv->mdev;
 	int err;
 
+	priv->dcbx_dp.trust_state = MLX5_QPTS_TRUST_PCP;
+
 	if (!MLX5_DSCP_SUPPORTED(mdev))
 		return 0;