Merge branch 'mlx5-fixes'

Saeed Mahameed says:

====================
Mellanox, mlx5e fixes 2018-08-07

I know it is late into 4.18 release, and this is why I am submitting
only two mlx5e ethernet fixes.

The first one from Or, is needed for -stable and it fixes hairpin
for "same device" check.

The second fix is a non risk fix from Huy which cleans up and improves
error return value reporting for dcbnl_ieee_setapp.

For -stable v4.16
- net/mlx5e: Properly check if hairpin is possible between two functions
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx5/core/en.h

@@ -858,8 +858,6 @@ struct mlx5e_profile {
 		mlx5e_fp_handle_rx_cqe handle_rx_cqe;
 		mlx5e_fp_handle_rx_cqe handle_rx_cqe_mpwqe;
 	} rx_handlers;
-	void	(*netdev_registered_init)(struct mlx5e_priv *priv);
-	void    (*netdev_registered_remove)(struct mlx5e_priv *priv);
 	int	max_tc;
 };
 

drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c

@@ -443,16 +443,12 @@ static int mlx5e_dcbnl_ieee_setapp(struct net_device *dev, struct dcb_app *app)
 	bool is_new;
 	int err;
 
-	if (app->selector != IEEE_8021QAZ_APP_SEL_DSCP)
-		return -EINVAL;
-
-	if (!MLX5_CAP_GEN(priv->mdev, vport_group_manager))
-		return -EINVAL;
-
-	if (!MLX5_DSCP_SUPPORTED(priv->mdev))
-		return -EINVAL;
+	if (!MLX5_CAP_GEN(priv->mdev, vport_group_manager) ||
+	    !MLX5_DSCP_SUPPORTED(priv->mdev))
+		return -EOPNOTSUPP;
 
-	if (app->protocol >= MLX5E_MAX_DSCP)
+	if ((app->selector != IEEE_8021QAZ_APP_SEL_DSCP) ||
+	    (app->protocol >= MLX5E_MAX_DSCP))
 		return -EINVAL;
 
 	/* Save the old entry info */
@@ -500,16 +496,12 @@ static int mlx5e_dcbnl_ieee_delapp(struct net_device *dev, struct dcb_app *app)
 	struct mlx5e_priv *priv = netdev_priv(dev);
 	int err;
 
-	if (app->selector != IEEE_8021QAZ_APP_SEL_DSCP)
-		return -EINVAL;
-
-	if (!MLX5_CAP_GEN(priv->mdev, vport_group_manager))
-		return -EINVAL;
-
-	if (!MLX5_DSCP_SUPPORTED(priv->mdev))
-		return -EINVAL;
+	if  (!MLX5_CAP_GEN(priv->mdev, vport_group_manager) ||
+	     !MLX5_DSCP_SUPPORTED(priv->mdev))
+		return -EOPNOTSUPP;
 
-	if (app->protocol >= MLX5E_MAX_DSCP)
+	if ((app->selector != IEEE_8021QAZ_APP_SEL_DSCP) ||
+	    (app->protocol >= MLX5E_MAX_DSCP))
 		return -EINVAL;
 
 	/* Skip if no dscp app entry */

drivers/net/ethernet/mellanox/mlx5/core/en_tc.c

@@ -1970,15 +1970,15 @@ static bool actions_match_supported(struct mlx5e_priv *priv,
 static bool same_hw_devs(struct mlx5e_priv *priv, struct mlx5e_priv *peer_priv)
 {
 	struct mlx5_core_dev *fmdev, *pmdev;
-	u16 func_id, peer_id;
+	u64 fsystem_guid, psystem_guid;
 
 	fmdev = priv->mdev;
 	pmdev = peer_priv->mdev;
 
-	func_id = (u16)((fmdev->pdev->bus->number << 8) | PCI_SLOT(fmdev->pdev->devfn));
-	peer_id = (u16)((pmdev->pdev->bus->number << 8) | PCI_SLOT(pmdev->pdev->devfn));
+	mlx5_query_nic_vport_system_image_guid(fmdev, &fsystem_guid);
+	mlx5_query_nic_vport_system_image_guid(pmdev, &psystem_guid);
 
-	return (func_id == peer_id);
+	return (fsystem_guid == psystem_guid);
 }
 
 static int parse_tc_nic_actions(struct mlx5e_priv *priv, struct tcf_exts *exts,