netdev - How to detect ethernet cable plug in event when ethernet card is in D3hot power state?

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Date:	Sun, 4 Jul 2010 16:50:58 +0800
From:	LionSky <loverunning2@...il.com>
To:	netdev@...r.kernel.org
Subject: How to detect ethernet cable plug in event when ethernet card is in 
	D3hot power state?

Just as the title.
A scenario is as follows:
When the cable is unplug-in, the ethernet card is placed into D3hot
power state for power saving.
When the cable is plug in later, it will be resumed back to D0 for user usage.

But I do not know whether the ethernet driver/OS can detect the cable
plug-in event when ethernet card is at D3hot power state?
 If it can do that, OS can resume it from D3 to D0.  Thanks
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