net/mlx5: Disable devlink reload for lag devices

Devlink reload can't be allowed on lag devices since reloading one lag
device will cause traffic on the bond to get stucked.
Users who wish to reload a lag device, need to remove the device from
the bond, and only then reload it.

Fixes: 4383cfcc65e7 ("net/mlx5: Add devlink reload")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
index c7073193db1407b3df79327a6ce92cc5ab4568a8..41474e42a819aaa29216c1c2aa32d0b625cd5317 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/devlink.c
@@ -128,6 +128,11 @@ static int mlx5_devlink_reload_down(struct devlink *devlink, bool netns_change,
 {
        struct mlx5_core_dev *dev = devlink_priv(devlink);
 
+       if (mlx5_lag_is_active(dev)) {
+               NL_SET_ERR_MSG_MOD(extack, "reload is unsupported in Lag mode\n");
+               return -EOPNOTSUPP;
+       }
+
        switch (action) {
        case DEVLINK_RELOAD_ACTION_DRIVER_REINIT:
                mlx5_unload_one(dev, false);