[PATCH net 8/9] net/mlx5: Add error prints when validate ETS failed

[Saeed Mahameed]

From: Eran Ben Elisha <era...@mellanox.com>

Upon set ETS failure due to user invalid input, add error prints to
specify the exact error to the user.

Fixes: cdcf11212b22 ('net/mlx5e: Validate BW weight values of ETS')
Signed-off-by: Eran Ben Elisha <era...@mellanox.com>
Signed-off-by: Saeed Mahameed <sae...@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c 
b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
index caa9a3c..762af16 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_dcbnl.c
@@ -127,29 +127,40 @@ int mlx5e_dcbnl_ieee_setets_core(struct mlx5e_priv *priv, 
struct ieee_ets *ets)
        return mlx5_set_port_tc_bw_alloc(mdev, tc_tx_bw);
 }
 
-static int mlx5e_dbcnl_validate_ets(struct ieee_ets *ets)
+static int mlx5e_dbcnl_validate_ets(struct net_device *netdev,
+                                   struct ieee_ets *ets)
 {
        int bw_sum = 0;
        int i;
 
        /* Validate Priority */
        for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
-               if (ets->prio_tc[i] >= MLX5E_MAX_PRIORITY)
+               if (ets->prio_tc[i] >= MLX5E_MAX_PRIORITY) {
+                       netdev_err(netdev,
+                                  "Failed to validate ETS: priority value 
greater than max(%d)\n",
+                                   MLX5E_MAX_PRIORITY);
                        return -EINVAL;
+               }
        }
 
        /* Validate Bandwidth Sum */
        for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
                if (ets->tc_tsa[i] == IEEE_8021QAZ_TSA_ETS) {
-                       if (!ets->tc_tx_bw[i])
+                       if (!ets->tc_tx_bw[i]) {
+                               netdev_err(netdev,
+                                          "Failed to validate ETS: BW 0 is 
illegal\n");
                                return -EINVAL;
+                       }
 
                        bw_sum += ets->tc_tx_bw[i];
                }
        }
 
-       if (bw_sum != 0 && bw_sum != 100)
+       if (bw_sum != 0 && bw_sum != 100) {
+               netdev_err(netdev,
+                          "Failed to validate ETS: BW sum is illegal\n");
                return -EINVAL;
+       }
        return 0;
 }
 
@@ -159,7 +170,7 @@ static int mlx5e_dcbnl_ieee_setets(struct net_device 
*netdev,
        struct mlx5e_priv *priv = netdev_priv(netdev);
        int err;
 
-       err = mlx5e_dbcnl_validate_ets(ets);
+       err = mlx5e_dbcnl_validate_ets(netdev, ets);
        if (err)
                return err;
 
-- 
2.7.4