From: Alexei Lazar <alazar@nvidia.com>
Date: Fri, 17 Jul 2026 07:51:25 +0000 (+0300)
Subject: net/mlx5e: Reject unsupported CB Shaper TSA in ETS validation
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=9173e1d3c7c7d49a71eee813091f9e834ec7cee5;p=thirdparty%2Fkernel%2Flinux.git

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 762f0a46c120..00e706e1ede1 100644
--- 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) {