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Date: Thu, 22 Jan 2015 21:59:22 +0100
From: Alexander Aring <alex.aring@gmail.com>
Subject: Re: Device or resource busy
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To: Rohit Kulkarni <rmkulkar@gmail.com>
Cc: Maciej Wasilak <wasilak@gmail.com>, linux-wpan@vger.kernel.org

Hi,

On Thu, Jan 22, 2015 at 01:29:24PM +0530, Rohit Kulkarni wrote:
> Hi,
> 
> ifdown/ifup also doesn't work on loopback and eth0! So this looks like
> a larger issue. Any ideas where I can get help for this?
> 

can you please send the output of:

`strace -f ifconfig wpan0 down`

Additional please give more information about your ifconfig version, is
it a busybox one? Ff yes then please tell us the busybox version.

Then maybe I can help you, otherwise maybe netdev or raspbian forums?

Thanks.

- Alex