3 files changed, 10 insertions, 3 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index 333a7a0b833c..7b513e9aea85 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -1285,7 +1285,8 @@ void mlx4_en_stop_port(struct net_device *dev)
 
         /* Unregister Mac address for the port */
         mlx4_put_eth_qp(mdev->dev, priv->port, priv->mac, priv->base_qpn);
-        mdev->mac_removed[priv->port] = 1;
+        if (!(mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAGS2_REASSIGN_MAC_EN))
+                mdev->mac_removed[priv->port] = 1;
 
         /* Remove flow steering rules for the port*/
         if (mdev->dev->caps.steering_mode ==
diff --git a/drivers/net/ethernet/mellanox/mlx4/fw.c b/drivers/net/ethernet/mellanox/mlx4/fw.c
index 91acf71aca97..38b62c78d5da 100644
--- a/drivers/net/ethernet/mellanox/mlx4/fw.c
+++ b/drivers/net/ethernet/mellanox/mlx4/fw.c
@@ -127,7 +127,8 @@ static void dump_dev_cap_flags2(struct mlx4_dev *dev, u64 flags)
                 [0] = "RSS support",
                 [1] = "RSS Toeplitz Hash Function support",
                 [2] = "RSS XOR Hash Function support",
-                [3] = "Device manage flow steering support"
+                [3] = "Device manage flow steering support",
+                [4] = "Automatic mac reassignment support"
         };
         int i;
 
@@ -478,6 +479,7 @@ int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
 #define QUERY_DEV_CAP_BMME_FLAGS_OFFSET         0x94
 #define QUERY_DEV_CAP_RSVD_LKEY_OFFSET          0x98
 #define QUERY_DEV_CAP_MAX_ICM_SZ_OFFSET         0xa0
+#define QUERY_DEV_CAP_FW_REASSIGN_MAC           0x9d
 
         dev_cap->flags2 = 0;
         mailbox = mlx4_alloc_cmd_mailbox(dev);
@@ -637,6 +639,9 @@ int mlx4_QUERY_DEV_CAP(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap)
                  QUERY_DEV_CAP_BMME_FLAGS_OFFSET);
         MLX4_GET(dev_cap->reserved_lkey, outbox,
                  QUERY_DEV_CAP_RSVD_LKEY_OFFSET);
+        MLX4_GET(field, outbox, QUERY_DEV_CAP_FW_REASSIGN_MAC);
+        if (field & 1<<6)
+                dev_cap->flags2 |= MLX4_DEV_CAP_FLAGS2_REASSIGN_MAC_EN;
         MLX4_GET(dev_cap->max_icm_sz, outbox,
                  QUERY_DEV_CAP_MAX_ICM_SZ_OFFSET);
         if (dev_cap->flags & MLX4_DEV_CAP_FLAG_COUNTERS)
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 20ea939c22a6..1883e8e84718 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -150,7 +150,8 @@ enum {
         MLX4_DEV_CAP_FLAG2_RSS                  = 1LL <<  0,
         MLX4_DEV_CAP_FLAG2_RSS_TOP              = 1LL <<  1,
         MLX4_DEV_CAP_FLAG2_RSS_XOR              = 1LL <<  2,
-        MLX4_DEV_CAP_FLAG2_FS_EN                = 1LL <<  3
+        MLX4_DEV_CAP_FLAG2_FS_EN                = 1LL <<  3,
+        MLX4_DEV_CAP_FLAGS2_REASSIGN_MAC_EN     = 1LL <<  4
 };
 
 enum {