From: Aya Levin <[email protected]>
[ Upstream commit 2608a2f831c47dfdf18885a7289be5af97182b05 ]
Verify the configured FEC mode is supported by at least a single link
mode before applying the command. Otherwise fail the command and return
"Operation not supported".
Prior to this patch, the command was successful, yet it falsely set all
link modes to FEC auto mode - like configuring FEC mode to auto. Auto
mode is the default configuration if a link mode doesn't support the
configured FEC mode.
Fixes: b5ede32d3329 ("net/mlx5e: Add support for FEC modes based on 50G per
lane links")
Signed-off-by: Aya Levin <[email protected]>
Reviewed-by: Eran Ben Elisha <[email protected]>
Reviewed-by: Moshe Shemesh <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
drivers/net/ethernet/mellanox/mlx5/core/en/port.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/port.c
b/drivers/net/ethernet/mellanox/mlx5/core/en/port.c
index 98e909bf3c1ec..3e32264cf6131 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/port.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/port.c
@@ -566,6 +566,9 @@ int mlx5e_set_fec_mode(struct mlx5_core_dev *dev, u16
fec_policy)
if (fec_policy >= (1 << MLX5E_FEC_LLRS_272_257_1) && !fec_50g_per_lane)
return -EOPNOTSUPP;
+ if (fec_policy && !mlx5e_fec_in_caps(dev, fec_policy))
+ return -EOPNOTSUPP;
+
MLX5_SET(pplm_reg, in, local_port, 1);
err = mlx5_core_access_reg(dev, in, sz, out, sz, MLX5_REG_PPLM, 0, 0);
if (err)
--
2.25.1
