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From: Hans Petter Selasky <hselasky@FreeBSD.org>
Date: Wed, 9 Aug 2017 10:32:51 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r322306 - head/sys/dev/mlx4/mlx4_en
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Author: hselasky
Date: Wed Aug  9 10:32:51 2017
New Revision: 322306
URL: https://svnweb.freebsd.org/changeset/base/322306

Log:
  Print maximum MTU when trying to set invalid MTU in the mlx4en(4) driver.
  Useful for debugging.
  
  Submitted by:		Sepherosa Ziehau <sephe@dragonflybsd.org>
  MFC after:		3 days
  Sponsored by:		Mellanox Technologies

Modified:
  head/sys/dev/mlx4/mlx4_en/mlx4_en_netdev.c

Modified: head/sys/dev/mlx4/mlx4_en/mlx4_en_netdev.c
==============================================================================
--- head/sys/dev/mlx4/mlx4_en/mlx4_en_netdev.c	Wed Aug  9 10:30:55 2017	(r322305)
+++ head/sys/dev/mlx4/mlx4_en/mlx4_en_netdev.c	Wed Aug  9 10:32:51 2017	(r322306)
@@ -1771,7 +1771,8 @@ static int mlx4_en_change_mtu(struct net_device *dev, 
 	       (unsigned)dev->if_mtu, (unsigned)new_mtu);
 
 	if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
-		en_err(priv, "Bad MTU size:%d.\n", new_mtu);
+		en_err(priv, "Bad MTU size:%d, max %u.\n", new_mtu,
+		    priv->max_mtu);
 		return -EPERM;
 	}
 	mutex_lock(&mdev->state_lock);