net/mlx5e: Reject unsupported CB Shaper TSA in ETS validation

Credit Based (CB) TSA is not supported by the mlx5 driver, so reject
any configurations that specify it.

Fixes: 08fb1dacdd76 ("net/mlx5e: Support DCBNL IEEE ETS")
Signed-off-by: Alexei Lazar <alazar@nvidia.com>
Reviewed-by: Carolina Jubran <cjubran@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Link: https://patch.msgid.link/20260717075125.1244877-3-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
index 762f0a46c12097d307defad65dcd6b9f47a2c3eb..00e706e1ede1113dedd73ee1896940b7c737215e 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
@@ -324,6 +324,14 @@ static int mlx5e_dbcnl_validate_ets(struct net_device *netdev,
                }
        }
 
+       for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
+               if (ets->tc_tsa[i] == IEEE_8021QAZ_TSA_CB_SHAPER) {
+                       netdev_err(netdev,
+                                  "Failed to validate ETS: CB Shaper is not supported\n");
+                       return -EOPNOTSUPP;
+               }
+       }
+
        /* Validate Bandwidth Sum */
        for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
                if (ets->tc_tsa[i] == IEEE_8021QAZ_TSA_ETS) {