Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755385AbaFBOgE (ORCPT ); Mon, 2 Jun 2014 10:36:04 -0400 Received: from mail-la0-f48.google.com ([209.85.215.48]:57660 "EHLO mail-la0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754454AbaFBOgB (ORCPT ); Mon, 2 Jun 2014 10:36:01 -0400 Date: Mon, 2 Jun 2014 16:35:57 +0200 From: Jiri Pirko To: Michal Privoznik Cc: davem@davemloft.net, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [PATCH] net-sysfs: Report link speed as signed integer Message-ID: <20140602143557.GA2925@minipsycho.orion> References: <06d53256e3bf2d0deedb16249082200500da3ee6.1401718809.git.mprivozn@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <06d53256e3bf2d0deedb16249082200500da3ee6.1401718809.git.mprivozn@redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Mon, Jun 02, 2014 at 04:25:15PM CEST, mprivozn@redhat.com wrote: >The link speed is available at /sys/class/net/$nic/speed. >However, the speed is printed in unsigned integer format. This >makes userspace applications read an incorrect value (which >moreover changes through several architectures) while in fact >'-1' should be reported. > >Before the change: > # cat /sys/class/net/eth0/speed > 4294967295 > >After the change: > # cat /sys/class/net/eth0/speed > -1 > >Signed-off-by: Michal Privoznik >--- > net/core/net-sysfs.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > >diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c >index 1cac29e..99afdea 100644 >--- a/net/core/net-sysfs.c >+++ b/net/core/net-sysfs.c >@@ -173,7 +173,7 @@ static ssize_t speed_show(struct device *dev, > if (netif_running(netdev)) { > struct ethtool_cmd cmd; > if (!__ethtool_get_settings(netdev, &cmd)) >- ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd)); >+ ret = sprintf(buf, fmt_dec, ethtool_cmd_speed(&cmd)); I wonder why this should be signed. What -1 means? What driver reports this? > } > rtnl_unlock(); > return ret; >-- >2.0.0 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/