diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index 6ff6bdf28a3a..abce99ed565f 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -225,21 +225,18 @@ static int ib_link_query_port(struct ib_device *ibdev, u8 port,
 
 	/* If reported active speed is QDR, check if is FDR-10 */
 	if (props->active_speed == IB_SPEED_QDR) {
-		if (to_mdev(ibdev)->dev->caps.ext_port_cap[port] &
-		    MLX_EXT_PORT_CAP_FLAG_EXTENDED_PORT_INFO) {
-			init_query_mad(in_mad);
-			in_mad->attr_id = MLX4_ATTR_EXTENDED_PORT_INFO;
-			in_mad->attr_mod = cpu_to_be32(port);
+		init_query_mad(in_mad);
+		in_mad->attr_id = MLX4_ATTR_EXTENDED_PORT_INFO;
+		in_mad->attr_mod = cpu_to_be32(port);
 
-			err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port,
-					   NULL, NULL, in_mad, out_mad);
-			if (err)
-				return err;
+		err = mlx4_MAD_IFC(to_mdev(ibdev), 1, 1, port,
+				   NULL, NULL, in_mad, out_mad);
+		if (err)
+			return err;
 
-			/* Checking LinkSpeedActive for FDR-10 */
-			if (out_mad->data[15] & 0x1)
-				props->active_speed = IB_SPEED_FDR10;
-		}
+		/* Checking LinkSpeedActive for FDR-10 */
+		if (out_mad->data[15] & 0x1)
+			props->active_speed = IB_SPEED_FDR10;
 	}
 
 	return 0;
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
index 678558b502fc..2f94d30ab12b 100644
--- a/drivers/net/ethernet/mellanox/mlx4/main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
@@ -1361,13 +1361,6 @@ static int mlx4_setup_hca(struct mlx4_dev *dev)
 					  "with caps = 0\n", port, err);
 			dev->caps.ib_port_def_cap[port] = ib_port_default_caps;
 
-			err = mlx4_check_ext_port_caps(dev, port);
-			if (err)
-				mlx4_warn(dev, "failed to get port %d extended "
-					  "port capabilities support info (%d)."
-					  " Assuming not supported\n",
-					  port, err);
-
 			err = mlx4_SET_PORT(dev, port);
 			if (err) {
 				mlx4_err(dev, "Failed to set port %d, aborting\n",
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4.h b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
index c92269f8c057..c34d30a5d77b 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4.h
@@ -1025,7 +1025,6 @@ int mlx4_QUERY_PORT_wrapper(struct mlx4_dev *dev, int slave,
 			    struct mlx4_cmd_mailbox *outbox,
 			    struct mlx4_cmd_info *cmd);
 int mlx4_get_port_ib_caps(struct mlx4_dev *dev, u8 port, __be32 *caps);
-int mlx4_check_ext_port_caps(struct mlx4_dev *dev, u8 port);
 
 
 int mlx4_QP_ATTACH_wrapper(struct mlx4_dev *dev, int slave,
diff --git a/drivers/net/ethernet/mellanox/mlx4/port.c b/drivers/net/ethernet/mellanox/mlx4/port.c
index f44ae555bf43..51708dd7c8b0 100644
--- a/drivers/net/ethernet/mellanox/mlx4/port.c
+++ b/drivers/net/ethernet/mellanox/mlx4/port.c
@@ -590,49 +590,6 @@ int mlx4_get_port_ib_caps(struct mlx4_dev *dev, u8 port, __be32 *caps)
 	return err;
 }
 
-int mlx4_check_ext_port_caps(struct mlx4_dev *dev, u8 port)
-{
-	struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
-	u8 *inbuf, *outbuf;
-	int err, packet_error;
-
-	inmailbox = mlx4_alloc_cmd_mailbox(dev);
-	if (IS_ERR(inmailbox))
-		return PTR_ERR(inmailbox);
-
-	outmailbox = mlx4_alloc_cmd_mailbox(dev);
-	if (IS_ERR(outmailbox)) {
-		mlx4_free_cmd_mailbox(dev, inmailbox);
-		return PTR_ERR(outmailbox);
-	}
-
-	inbuf = inmailbox->buf;
-	outbuf = outmailbox->buf;
-	memset(inbuf, 0, 256);
-	memset(outbuf, 0, 256);
-	inbuf[0] = 1;
-	inbuf[1] = 1;
-	inbuf[2] = 1;
-	inbuf[3] = 1;
-
-	*(__be16 *) (&inbuf[16]) = MLX4_ATTR_EXTENDED_PORT_INFO;
-	*(__be32 *) (&inbuf[20]) = cpu_to_be32(port);
-
-	err = mlx4_cmd_box(dev, inmailbox->dma, outmailbox->dma, port, 3,
-			   MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C,
-			   MLX4_CMD_NATIVE);
-
-	packet_error = be16_to_cpu(*(__be16 *) (outbuf + 4));
-
-	dev->caps.ext_port_cap[port] = (!err && !packet_error) ?
-				       MLX_EXT_PORT_CAP_FLAG_EXTENDED_PORT_INFO
-				       : 0;
-
-	mlx4_free_cmd_mailbox(dev, inmailbox);
-	mlx4_free_cmd_mailbox(dev, outmailbox);
-	return err;
-}
-
 static int mlx4_common_set_port(struct mlx4_dev *dev, int slave, u32 in_mod,
 				u8 op_mod, struct mlx4_cmd_mailbox *inbox)
 {
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index aea61905499b..be7f235c04c0 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -100,10 +100,6 @@ enum {
 
 #define MLX4_ATTR_EXTENDED_PORT_INFO	cpu_to_be16(0xff90)
 
-enum {
-	MLX_EXT_PORT_CAP_FLAG_EXTENDED_PORT_INFO	= 1 <<  0
-};
-
 enum {
 	MLX4_BMME_FLAG_LOCAL_INV	= 1 <<  6,
 	MLX4_BMME_FLAG_REMOTE_INV	= 1 <<  7,
@@ -308,7 +304,6 @@ struct mlx4_caps {
 	u32			port_mask[MLX4_MAX_PORTS + 1];
 	enum mlx4_port_type	possible_type[MLX4_MAX_PORTS + 1];
 	u32			max_counters;
-	u8			ext_port_cap[MLX4_MAX_PORTS + 1];
 };
 
 struct mlx4_buf_list {