linux-kernel - Re: power off USB port

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Message-ID: <20080407054832.GA11216@kroah.com>
Date:	Sun, 6 Apr 2008 22:48:32 -0700
From:	Greg KH <greg@...ah.com>
To:	Xavier Bestel <xavier.bestel@...e.fr>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: power off USB port

On Sun, Apr 06, 2008 at 12:20:24PM +0200, Xavier Bestel wrote:
> Hi,
> 
> I'd like to power off some usb ports (to make ejected usb flash drives
> power off their little "don't remove me yet" led), but I can't find how
> to do it with a 2.6.24 kernel:
> - eject /dev/sd? doesn't work anymore
> - /sys/bus/usb/devices/*/power/state doesn't exist anymore
> - hub-ctrl-2.c [1] fails with a "Broken pipe" error
> 
> Does anyone know how to achieve that ?

You can not, sorry.  Please see the archives of this list, and the
linux-usb list for the many many many times this keeps coming up.

thanks,

greg k-h
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