net/mlx5: Enable 4 ports VF LAG

Now, after all preparation are done, enable 4 ports VF LAG
Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

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

@@ -711,7 +711,7 @@ int mlx5_deactivate_lag(struct mlx5_lag *ldev)
 	return 0;
 }
 
-#define MLX5_LAG_OFFLOADS_SUPPORTED_PORTS 2
+#define MLX5_LAG_OFFLOADS_SUPPORTED_PORTS 4
 bool mlx5_lag_check_prereq(struct mlx5_lag *ldev)
 {
 #ifdef CONFIG_MLX5_ESWITCH
@@ -737,7 +737,7 @@ bool mlx5_lag_check_prereq(struct mlx5_lag *ldev)
 		if (mlx5_eswitch_mode(ldev->pf[i].dev) != mode)
 			return false;
 
-	if (mode == MLX5_ESWITCH_OFFLOADS && ldev->ports != MLX5_LAG_OFFLOADS_SUPPORTED_PORTS)
+	if (mode == MLX5_ESWITCH_OFFLOADS && ldev->ports > MLX5_LAG_OFFLOADS_SUPPORTED_PORTS)
 		return false;
 #else
 	for (i = 0; i < ldev->ports; i++)

drivers/net/ethernet/mellanox/mlx5/core/lib/devcom.c

@@ -75,13 +75,14 @@ struct mlx5_devcom *mlx5_devcom_register_device(struct mlx5_core_dev *dev)
 
 	if (!mlx5_core_is_pf(dev))
 		return NULL;
-	if (MLX5_CAP_GEN(dev, num_lag_ports) != MLX5_DEVCOM_PORTS_SUPPORTED)
+	if (MLX5_CAP_GEN(dev, num_lag_ports) > MLX5_DEVCOM_PORTS_SUPPORTED)
 		return NULL;
 
 	mlx5_dev_list_lock();
 	sguid0 = mlx5_query_nic_system_image_guid(dev);
 	list_for_each_entry(iter, &devcom_list, list) {
-		struct mlx5_core_dev *tmp_dev = NULL;
+		/* There is at least one device in iter */
+		struct mlx5_core_dev *tmp_dev;
 
 		idx = -1;
 		for (i = 0; i < MLX5_DEVCOM_PORTS_SUPPORTED; i++) {

drivers/net/ethernet/mellanox/mlx5/core/lib/devcom.h

@@ -6,7 +6,7 @@
 
 #include <linux/mlx5/driver.h>
 
-#define MLX5_DEVCOM_PORTS_SUPPORTED 2
+#define MLX5_DEVCOM_PORTS_SUPPORTED 4
 
 enum mlx5_devcom_components {
 	MLX5_DEVCOM_ESW_OFFLOADS,