net/mlx5e: Fix error flow in change profile

Move priv memset from init to cleanup to avoid double priv cleanup
that can happen on profile change if also roolback fails.
Add missing cleanup flow in mlx5e_netdev_attach_profile().

Fixes: c4d7eb57 ("net/mxl5e: Add change profile method")
Signed-off-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

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

@@ -5488,8 +5488,6 @@ int mlx5e_priv_init(struct mlx5e_priv *priv,
 		    struct net_device *netdev,
 		    struct mlx5_core_dev *mdev)
 {
-	memset(priv, 0, sizeof(*priv));
-
 	/* priv init */
 	priv->mdev        = mdev;
 	priv->netdev      = netdev;
@@ -5522,12 +5520,18 @@ void mlx5e_priv_cleanup(struct mlx5e_priv *priv)
 {
 	int i;
 
+	/* bail if change profile failed and also rollback failed */
+	if (!priv->mdev)
+		return;
+
 	destroy_workqueue(priv->wq);
 	free_cpumask_var(priv->scratchpad.cpumask);
 
 	for (i = 0; i < priv->htb.max_qos_sqs; i++)
 		kfree(priv->htb.qos_sq_stats[i]);
 	kvfree(priv->htb.qos_sq_stats);
+
+	memset(priv, 0, sizeof(*priv));
 }
 
 struct net_device *
@@ -5644,11 +5648,10 @@ void mlx5e_detach_netdev(struct mlx5e_priv *priv)
 }
 
 static int
-mlx5e_netdev_attach_profile(struct mlx5e_priv *priv,
+mlx5e_netdev_attach_profile(struct net_device *netdev, struct mlx5_core_dev *mdev,
 			    const struct mlx5e_profile *new_profile, void *new_ppriv)
 {
-	struct net_device *netdev = priv->netdev;
-	struct mlx5_core_dev *mdev = priv->mdev;
+	struct mlx5e_priv *priv = netdev_priv(netdev);
 	int err;
 
 	err = mlx5e_priv_init(priv, netdev, mdev);
@@ -5661,10 +5664,16 @@ mlx5e_netdev_attach_profile(struct mlx5e_priv *priv,
 	priv->ppriv = new_ppriv;
 	err = new_profile->init(priv->mdev, priv->netdev);
 	if (err)
-		return err;
+		goto priv_cleanup;
 	err = mlx5e_attach_netdev(priv);
 	if (err)
-		new_profile->cleanup(priv);
+		goto profile_cleanup;
+	return err;
+
+profile_cleanup:
+	new_profile->cleanup(priv);
+priv_cleanup:
+	mlx5e_priv_cleanup(priv);
 	return err;
 }
 
@@ -5673,13 +5682,14 @@ int mlx5e_netdev_change_profile(struct mlx5e_priv *priv,
 {
 	unsigned int new_max_nch = mlx5e_calc_max_nch(priv, new_profile);
 	const struct mlx5e_profile *orig_profile = priv->profile;
+	struct net_device *netdev = priv->netdev;
+	struct mlx5_core_dev *mdev = priv->mdev;
 	void *orig_ppriv = priv->ppriv;
 	int err, rollback_err;
 
 	/* sanity */
 	if (new_max_nch != priv->max_nch) {
-		netdev_warn(priv->netdev,
-			    "%s: Replacing profile with different max channels\n",
+		netdev_warn(netdev, "%s: Replacing profile with different max channels\n",
 			    __func__);
 		return -EINVAL;
 	}
@@ -5689,22 +5699,19 @@ int mlx5e_netdev_change_profile(struct mlx5e_priv *priv,
 	priv->profile->cleanup(priv);
 	mlx5e_priv_cleanup(priv);
 
-	err = mlx5e_netdev_attach_profile(priv, new_profile, new_ppriv);
+	err = mlx5e_netdev_attach_profile(netdev, mdev, new_profile, new_ppriv);
 	if (err) { /* roll back to original profile */
-		netdev_warn(priv->netdev, "%s: new profile init failed, %d\n",
-			    __func__, err);
+		netdev_warn(netdev, "%s: new profile init failed, %d\n", __func__, err);
 		goto rollback;
 	}
 
 	return 0;
 
 rollback:
-	rollback_err = mlx5e_netdev_attach_profile(priv, orig_profile, orig_ppriv);
-	if (rollback_err) {
-		netdev_err(priv->netdev,
-			   "%s: failed to rollback to orig profile, %d\n",
+	rollback_err = mlx5e_netdev_attach_profile(netdev, mdev, orig_profile, orig_ppriv);
+	if (rollback_err)
+		netdev_err(netdev, "%s: failed to rollback to orig profile, %d\n",
 			   __func__, rollback_err);
-	}
 	return err;
 }
 

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

@@ -694,6 +694,7 @@ static int mlx5i_check_required_hca_cap(struct mlx5_core_dev *mdev)
 static void mlx5_rdma_netdev_free(struct net_device *netdev)
 {
 	struct mlx5e_priv *priv = mlx5i_epriv(netdev);
+	struct mlx5_core_dev *mdev = priv->mdev;
 	struct mlx5i_priv *ipriv = priv->ppriv;
 	const struct mlx5e_profile *profile = priv->profile;
 
@@ -702,7 +703,7 @@ static void mlx5_rdma_netdev_free(struct net_device *netdev)
 
 	if (!ipriv->sub_interface) {
 		mlx5i_pkey_qpn_ht_cleanup(netdev);
-		mlx5e_destroy_mdev_resources(priv->mdev);
+		mlx5e_destroy_mdev_resources(mdev);
 	}
 }