[PATCH net 2/4] net/mlx5e: Skip PPHCR register query if not supported by the device

[Tariq Toukan <tariqt@nvidia.com>]

From: Alexei Lazar <alazar@nvidia.com>

Check the PCAM supported registers mask before querying the PPHCR
register, as it is not supported in older devices.

Fixes: 44907e7c8fd0 ("net/mlx5e: Add logic to read RS-FEC histogram bin ranges from PPHCR")
Signed-off-by: Alexei Lazar <alazar@nvidia.com>
Reviewed-by: Yael Chemla <ychemla@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_stats.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
index 7c029a7d0fd7..a2802cfc9b98 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_stats.c
@@ -1614,7 +1614,9 @@ void mlx5e_stats_fec_get(struct mlx5e_priv *priv,
 
 	fec_set_corrected_bits_total(priv, fec_stats);
 	fec_set_block_stats(priv, mode, fec_stats);
-	fec_set_histograms_stats(priv, mode, hist);
+
+	if (MLX5_CAP_PCAM_REG(priv->mdev, pphcr))
+		fec_set_histograms_stats(priv, mode, hist);
 }
 
 #define PPORT_ETH_EXT_OFF(c) \
-- 
2.31.1