mlx5-fixes-2021-09-07

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Merge tag 'mlx5-fixes-2021-09-07' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
mlx5 fixes 2021-09-07

This series introduces some fixes to mlx5 driver.
Please pull and let me know if there is any problem.

Included here, a patch which solves a build warning reported on
linux-kernel mailing list [1]:
Fix commit ("net/mlx5: Bridge, fix uninitialized variable usage")

I hope this series can make it to rc1.

[1] https://www.spinics.net/lists/netdev/msg765481.html
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -658,11 +658,10 @@ static const struct devlink_param enable_rdma_param =
 
 static int mlx5_devlink_rdma_param_register(struct devlink *devlink)
 {
-	struct mlx5_core_dev *dev = devlink_priv(devlink);
 	union devlink_param_value value;
 	int err;
 
-	if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND) || MLX5_ESWITCH_MANAGER(dev))
+	if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
 		return 0;
 
 	err = devlink_param_register(devlink, &enable_rdma_param);
@@ -679,9 +678,7 @@ static int mlx5_devlink_rdma_param_register(struct devlink *devlink)
 
 static void mlx5_devlink_rdma_param_unregister(struct devlink *devlink)
 {
-	struct mlx5_core_dev *dev = devlink_priv(devlink);
-
-	if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND) || MLX5_ESWITCH_MANAGER(dev))
+	if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
 		return;
 
 	devlink_param_unpublish(devlink, &enable_rdma_param);

drivers/net/ethernet/mellanox/mlx5/core/diag/fw_tracer.c

@@ -1007,7 +1007,7 @@ int mlx5_fw_tracer_init(struct mlx5_fw_tracer *tracer)
 	err = mlx5_core_alloc_pd(dev, &tracer->buff.pdn);
 	if (err) {
 		mlx5_core_warn(dev, "FWTracer: Failed to allocate PD %d\n", err);
-		return err;
+		goto err_cancel_work;
 	}
 
 	err = mlx5_fw_tracer_create_mkey(tracer);
@@ -1031,6 +1031,7 @@ err_notifier_unregister:
 	mlx5_core_destroy_mkey(dev, &tracer->buff.mkey);
 err_dealloc_pd:
 	mlx5_core_dealloc_pd(dev, tracer->buff.pdn);
+err_cancel_work:
 	cancel_work_sync(&tracer->read_fw_strings_work);
 	return err;
 }

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

@@ -922,7 +922,7 @@ void mlx5e_set_rx_mode_work(struct work_struct *work);
 
 int mlx5e_hwstamp_set(struct mlx5e_priv *priv, struct ifreq *ifr);
 int mlx5e_hwstamp_get(struct mlx5e_priv *priv, struct ifreq *ifr);
-int mlx5e_modify_rx_cqe_compression_locked(struct mlx5e_priv *priv, bool val);
+int mlx5e_modify_rx_cqe_compression_locked(struct mlx5e_priv *priv, bool val, bool rx_filter);
 
 int mlx5e_vlan_rx_add_vid(struct net_device *dev, __always_unused __be16 proto,
 			  u16 vid);

drivers/net/ethernet/mellanox/mlx5/core/en/rep/bridge.c

@@ -137,7 +137,7 @@ static int mlx5_esw_bridge_port_changeupper(struct notifier_block *nb, void *ptr
 	u16 vport_num, esw_owner_vhca_id;
 	struct netlink_ext_ack *extack;
 	int ifindex = upper->ifindex;
-	int err;
+	int err = 0;
 
 	if (!netif_is_bridge_master(upper))
 		return 0;
@@ -244,7 +244,7 @@ mlx5_esw_bridge_port_obj_attr_set(struct net_device *dev,
 	struct netlink_ext_ack *extack = switchdev_notifier_info_to_extack(&port_attr_info->info);
 	const struct switchdev_attr *attr = port_attr_info->attr;
 	u16 vport_num, esw_owner_vhca_id;
-	int err;
+	int err = 0;
 
 	if (!mlx5_esw_bridge_lower_rep_vport_num_vhca_id_get(dev, br_offloads->esw, &vport_num,
 							     &esw_owner_vhca_id))

drivers/net/ethernet/mellanox/mlx5/core/en/rx_res.c

@@ -572,7 +572,7 @@ void mlx5e_rx_res_channels_activate(struct mlx5e_rx_res *res, struct mlx5e_chann
 	if (res->features & MLX5E_RX_RES_FEATURE_PTP) {
 		u32 rqn;
 
-		if (mlx5e_channels_get_ptp_rqn(chs, &rqn))
+		if (!mlx5e_channels_get_ptp_rqn(chs, &rqn))
 			rqn = res->drop_rqn;
 
 		err = mlx5e_rqt_redirect_direct(&res->ptp.rqt, rqn);

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

@@ -1884,7 +1884,7 @@ static int set_pflag_rx_cqe_based_moder(struct net_device *netdev, bool enable)
 	return set_pflag_cqe_based_moder(netdev, enable, true);
 }
 
-int mlx5e_modify_rx_cqe_compression_locked(struct mlx5e_priv *priv, bool new_val)
+int mlx5e_modify_rx_cqe_compression_locked(struct mlx5e_priv *priv, bool new_val, bool rx_filter)
 {
 	bool curr_val = MLX5E_GET_PFLAG(&priv->channels.params, MLX5E_PFLAG_RX_CQE_COMPRESS);
 	struct mlx5e_params new_params;
@@ -1896,8 +1896,7 @@ int mlx5e_modify_rx_cqe_compression_locked(struct mlx5e_priv *priv, bool new_val
 	if (curr_val == new_val)
 		return 0;
 
-	if (new_val && !priv->profile->rx_ptp_support &&
-	    priv->tstamp.rx_filter != HWTSTAMP_FILTER_NONE) {
+	if (new_val && !priv->profile->rx_ptp_support && rx_filter) {
 		netdev_err(priv->netdev,
 			   "Profile doesn't support enabling of CQE compression while hardware time-stamping is enabled.\n");
 		return -EINVAL;
@@ -1905,7 +1904,7 @@ int mlx5e_modify_rx_cqe_compression_locked(struct mlx5e_priv *priv, bool new_val
 
 	new_params = priv->channels.params;
 	MLX5E_SET_PFLAG(&new_params, MLX5E_PFLAG_RX_CQE_COMPRESS, new_val);
-	if (priv->tstamp.rx_filter != HWTSTAMP_FILTER_NONE)
+	if (rx_filter)
 		new_params.ptp_rx = new_val;
 
 	if (new_params.ptp_rx == priv->channels.params.ptp_rx)
@@ -1928,12 +1927,14 @@ static int set_pflag_rx_cqe_compress(struct net_device *netdev,
 {
 	struct mlx5e_priv *priv = netdev_priv(netdev);
 	struct mlx5_core_dev *mdev = priv->mdev;
+	bool rx_filter;
 	int err;
 
 	if (!MLX5_CAP_GEN(mdev, cqe_compression))
 		return -EOPNOTSUPP;
 
-	err = mlx5e_modify_rx_cqe_compression_locked(priv, enable);
+	rx_filter = priv->tstamp.rx_filter != HWTSTAMP_FILTER_NONE;
+	err = mlx5e_modify_rx_cqe_compression_locked(priv, enable, rx_filter);
 	if (err)
 		return err;
 

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

@@ -3554,14 +3554,14 @@ static int mlx5e_hwstamp_config_no_ptp_rx(struct mlx5e_priv *priv, bool rx_filte
 
 	if (!rx_filter)
 		/* Reset CQE compression to Admin default */
-		return mlx5e_modify_rx_cqe_compression_locked(priv, rx_cqe_compress_def);
+		return mlx5e_modify_rx_cqe_compression_locked(priv, rx_cqe_compress_def, false);
 
 	if (!MLX5E_GET_PFLAG(&priv->channels.params, MLX5E_PFLAG_RX_CQE_COMPRESS))
 		return 0;
 
 	/* Disable CQE compression */
 	netdev_warn(priv->netdev, "Disabling RX cqe compression\n");
-	err = mlx5e_modify_rx_cqe_compression_locked(priv, false);
+	err = mlx5e_modify_rx_cqe_compression_locked(priv, false, true);
 	if (err)
 		netdev_err(priv->netdev, "Failed disabling cqe compression err=%d\n", err);
 

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

@@ -1682,14 +1682,13 @@ static int build_match_list(struct match_list *match_head,
 
 		curr_match = kmalloc(sizeof(*curr_match), GFP_ATOMIC);
 		if (!curr_match) {
+			rcu_read_unlock();
 			free_match_list(match_head, ft_locked);
-			err = -ENOMEM;
-			goto out;
+			return -ENOMEM;
 		}
 		curr_match->g = g;
 		list_add_tail(&curr_match->list, &match_head->list);
 	}
-out:
 	rcu_read_unlock();
 	return err;
 }

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

@@ -927,9 +927,12 @@ void mlx5_lag_disable_change(struct mlx5_core_dev *dev)
 	struct mlx5_core_dev *dev1;
 	struct mlx5_lag *ldev;
 
+	ldev = mlx5_lag_dev(dev);
+	if (!ldev)
+		return;
+
 	mlx5_dev_list_lock();
 
-	ldev = mlx5_lag_dev(dev);
 	dev0 = ldev->pf[MLX5_LAG_P1].dev;
 	dev1 = ldev->pf[MLX5_LAG_P2].dev;
 
@@ -946,8 +949,11 @@ void mlx5_lag_enable_change(struct mlx5_core_dev *dev)
 {
 	struct mlx5_lag *ldev;
 
-	mlx5_dev_list_lock();
 	ldev = mlx5_lag_dev(dev);
+	if (!ldev)
+		return;
+
+	mlx5_dev_list_lock();
 	ldev->mode_changes_in_progress--;
 	mlx5_dev_list_unlock();
 	mlx5_queue_bond_work(ldev, 0);