[PATCH net 3/3] net/mlx5e: Reject unsupported CB Shaper TSA in ETS validation

[Tariq Toukan <tariqt@nvidia.com>]

From: Alexei Lazar <alazar@nvidia.com>

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>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
index e4161603cdc0..602b982b1bbf 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
@@ -326,6 +326,12 @@ static int mlx5e_dbcnl_validate_ets(struct net_device *netdev,
 
 	/* Validate Non ETS BW */
 	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;
+		}
+
 		if (ets->tc_tsa[i] != IEEE_8021QAZ_TSA_ETS &&
 		    ets->tc_tx_bw[i]) {
 			netdev_err(netdev,
-- 
2.44.0