netdev - Re: [patch net-next-2.6 1/2] net: allow to change carrier via sysfs

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Message-ID: <20110831082655.GB2010@minipsycho.brq.redhat.com>
Date:	Wed, 31 Aug 2011 10:26:56 +0200
From:	Jiri Pirko <jpirko@...hat.com>
To:	Michał Mirosław <mirqus@...il.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net,
	eric.dumazet@...il.com, bhutchings@...arflare.com,
	shemminger@...tta.com
Subject: Re: [patch net-next-2.6 1/2] net: allow to change carrier via sysfs

Tue, Aug 30, 2011 at 08:11:37PM CEST, mirqus@...il.com wrote:
>2011/8/30 Jiri Pirko <jpirko@...hat.com>:
>> Allow to write to "carrier" attribute. Devices may implement ndo_change_carrier
>> callback to allow changing carrier from userspace.
>
>Do you expect drivers using implementation different than just calling
>netif_carrier_on/off? Or is it supposed to also e.g. power down PHYs?

Yes, generally it can be used also for en/disable phy, for testing
purposes if hw and driver would support it.

>
>BTW, I like this feature!
>
>Best Regards,
>Michał Mirosław
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