[dpdk-dev] [PATCH] net/mlx5: fix use of bit numbers instead of masks

[Edward Makarov]

The constant ETHTOOL_LINK_MODE_1000baseT_Full_BIT and the others like
that in mlx5_link_update_unlocked_gs must be bit masks but unfortunately
they are bit numbers. This commit fixes the issue.

Fixes: 188408719888 ("net/mlx5: fix support for newer link speeds")
Cc: nelio.laranjeiro at 6wind.com
Cc: stable at dpdk.org

Signed-off-by: Edward Makarov <makarov at kraftway.ru>
---
 drivers/net/mlx5/mlx5_ethdev.c | 50 +++++++++++++++++++++---------------------
 drivers/net/mlx5/mlx5_utils.h  |  4 ++++
 2 files changed, 29 insertions(+), 25 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index c31ea4b62..a3cef6891 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -865,39 +865,39 @@ mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev, int wait_to_complete)
 	sc = ecmd->link_mode_masks[0] |
 		((uint64_t)ecmd->link_mode_masks[1] << 32);
 	priv->link_speed_capa = 0;
-	if (sc & ETHTOOL_LINK_MODE_Autoneg_BIT)
+	if (sc & MLX5_BITSHIFT(ETHTOOL_LINK_MODE_Autoneg_BIT))
 		priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
-	if (sc & (ETHTOOL_LINK_MODE_1000baseT_Full_BIT |
-		  ETHTOOL_LINK_MODE_1000baseKX_Full_BIT))
+	if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseT_Full_BIT) |
+		  MLX5_BITSHIFT(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT)))
 		priv->link_speed_capa |= ETH_LINK_SPEED_1G;
-	if (sc & (ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT |
-		  ETHTOOL_LINK_MODE_10000baseKR_Full_BIT |
-		  ETHTOOL_LINK_MODE_10000baseR_FEC_BIT))
+	if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT) |
+		  MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT) |
+		  MLX5_BITSHIFT(ETHTOOL_LINK_MODE_10000baseR_FEC_BIT)))
 		priv->link_speed_capa |= ETH_LINK_SPEED_10G;
-	if (sc & (ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT |
-		  ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT))
+	if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT) |
+		  MLX5_BITSHIFT(ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT)))
 		priv->link_speed_capa |= ETH_LINK_SPEED_20G;
-	if (sc & (ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT |
-		  ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT |
-		  ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT |
-		  ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT))
+	if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT) |
+		  MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT) |
+		  MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT) |
+		  MLX5_BITSHIFT(ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT)))
 		priv->link_speed_capa |= ETH_LINK_SPEED_40G;
-	if (sc & (ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT |
-		  ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT |
-		  ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT |
-		  ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT))
+	if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT) |
+		  MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT) |
+		  MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT) |
+		  MLX5_BITSHIFT(ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT)))
 		priv->link_speed_capa |= ETH_LINK_SPEED_56G;
-	if (sc & (ETHTOOL_LINK_MODE_25000baseCR_Full_BIT |
-		  ETHTOOL_LINK_MODE_25000baseKR_Full_BIT |
-		  ETHTOOL_LINK_MODE_25000baseSR_Full_BIT))
+	if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseCR_Full_BIT) |
+		  MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseKR_Full_BIT) |
+		  MLX5_BITSHIFT(ETHTOOL_LINK_MODE_25000baseSR_Full_BIT)))
 		priv->link_speed_capa |= ETH_LINK_SPEED_25G;
-	if (sc & (ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT |
-		  ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT))
+	if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT) |
+		  MLX5_BITSHIFT(ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT)))
 		priv->link_speed_capa |= ETH_LINK_SPEED_50G;
-	if (sc & (ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT |
-		  ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT |
-		  ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT |
-		  ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT))
+	if (sc & (MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT) |
+		  MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT) |
+		  MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT) |
+		  MLX5_BITSHIFT(ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT)))
 		priv->link_speed_capa |= ETH_LINK_SPEED_100G;
 	dev_link.link_duplex = ((ecmd->duplex == DUPLEX_HALF) ?
 				ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
diff --git a/drivers/net/mlx5/mlx5_utils.h b/drivers/net/mlx5/mlx5_utils.h
index 218ae831f..2fbd10b18 100644
--- a/drivers/net/mlx5/mlx5_utils.h
+++ b/drivers/net/mlx5/mlx5_utils.h
@@ -35,6 +35,7 @@
 #define RTE_PMD_MLX5_UTILS_H_
 
 #include <stddef.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <limits.h>
 #include <assert.h>
@@ -61,6 +62,9 @@
 	 !!(((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] & \
 	     ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT))))))
 
+/* Convert a bit number to the corresponding 64-bit mask */
+#define MLX5_BITSHIFT(v) (UINT64_C(1) << (v))
+
 /* Save and restore errno around argument evaluation. */
 #define ERRNO_SAFE(x) ((errno = (int []){ errno, ((x), 0) }[0]))
 
-- 
2.11.0