[net 01/11] net/mlx5e: Check for qos capability in dcbnl_initialize

[Saeed Mahameed]

From: Huy Nguyen <h...@mellanox.com>

qos capability is the master capability bit that determines
if the DCBX is supported for the PCI function. If this bit is off,
driver cannot run any dcbx code.

Fixes: e207b7e99176 ("net/mlx5e: ConnectX-4 firmware support for DCBX")
Signed-off-by: Huy Nguyen <h...@mellanox.com>
Reviewed-by: Parav Pandit <pa...@mellanox.com>
Signed-off-by: Saeed Mahameed <sae...@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c 
b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
index 2eb54d36e16e..810b51029c7f 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
@@ -754,6 +754,9 @@ void mlx5e_dcbnl_initialize(struct mlx5e_priv *priv)
 {
        struct mlx5e_dcbx *dcbx = &priv->dcbx;
 
+       if (!MLX5_CAP_GEN(priv->mdev, qos))
+               return;
+
        if (MLX5_CAP_GEN(priv->mdev, dcbx))
                mlx5e_dcbnl_query_dcbx_mode(priv, &dcbx->mode);
 
-- 
2.13.0