linux-kernel - Re: SYSFS "errors"

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Message-ID: <2721602.qxhJKWaVil@ws-stein>
Date:	Tue, 19 Feb 2013 08:41:47 +0100
From:	Alexander Stein <alexander.stein@...tec-electronic.com>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	Felipe Balbi <balbi@...com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: SYSFS "errors"

On Monday 18 February 2013 09:49:16, Greg KH wrote:
> > Invalid argument - /sys/devices/virtual/net/lo/speed
> > Invalid argument - /sys/devices/virtual/net/lo/duplex

This is even true for ethernet devices which do not have a link currently or non-ethernet devices (e.g. CAN).
> LANG=C cat /sys/class/net/enp1s8/speed
> cat: /sys/class/net/enp1s8/speed: Invalid argument
> ethtool enp1s8 | grep -A1 Speed
>         Speed: Unknown!
>         Duplex: Unknown! (255)
> LANG=C cat /sys/class/net/can0/speed
> cat: /sys/class/net/can0/speed: Invalid argument

Regards,
Alexander

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