netdev - Re: [PATCH] atmtcp: add sysfs attr for changing atm carrier signal state.

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Date:	Sun, 03 Oct 2010 13:00:57 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	karl@...amoto.org
Cc:	netdev@...r.kernel.org, linux-atm-general@...ts.sourceforge.net,
	chas@....nrl.navy.mil
Subject: Re: [PATCH] atmtcp: add sysfs attr for changing atm carrier signal
 state.

From: Karl Hiramoto <karl@...amoto.org>
Date: Sun,  3 Oct 2010 21:51:25 +0200

> This will be used for device testing carrier signal changes in other parts of
> the atm stack.
> 
> Carrier lost set by:
> echo -n 0 > /sys/class/atm/atmtcp0/carrier
> 
> Carrier detected:
> echo -n 1 > /sys/class/atm/atmtcp0/carrier
> 
> Signed-off-by: Karl Hiramoto <karl@...amoto.org>

We already have enough sysfs hacky knobs.

And for something as fundamental as setting the carrier status, it's
not acceptable to add a device-type specific control.

Use something we have already, either via core device state management
(via netlink or ifconfig's ioctls) or ethtool.

Thanks.
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