net/mlx5: Read the TC mapping of all priorities on ETS query

When ETS configurations are queried by the user to get the mapping
assignment between packet priority and traffic class, only priorities up
to maximum TCs are queried from QTCT register in FW to retrieve their
assigned TC, leaving the rest of the priorities mapped to the default
TC #0 which might be misleading.

Fix by querying the TC mapping of all priorities on each ETS query,
regardless of the maximum number of TCs configured in FW.

Fixes: 820c2c5e773d ("net/mlx5e: Read ETS settings directly from firmware")
Signed-off-by: Maher Sanalla <msanalla@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/en_dcbnl.c b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
index 2449731b7d79a715c3d07a923bb4719cf299bd25..89de92d0648363a899793f1aa5ea4fb324a9ddc8 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
@@ -117,12 +117,14 @@ static int mlx5e_dcbnl_ieee_getets(struct net_device *netdev,
        if (!MLX5_CAP_GEN(priv->mdev, ets))
                return -EOPNOTSUPP;
 
-       ets->ets_cap = mlx5_max_tc(priv->mdev) + 1;
-       for (i = 0; i < ets->ets_cap; i++) {
+       for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
                err = mlx5_query_port_prio_tc(mdev, i, &ets->prio_tc[i]);
                if (err)
                        return err;
+       }
 
+       ets->ets_cap = mlx5_max_tc(priv->mdev) + 1;
+       for (i = 0; i < ets->ets_cap; i++) {
                err = mlx5_query_port_tc_group(mdev, i, &tc_group[i]);
                if (err)
                        return err;