linux-kernel - Question about failure in PCI power-state change

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Message-ID: <504A78E9.4030005@lwfinger.net>
Date:	Fri, 07 Sep 2012 17:44:57 -0500
From:	Larry Finger <Larry.Finger@...inger.net>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	linux-pci@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	李朝明 <chaoming_li@...lsil.com.cn>
Subject: Question about failure in PCI power-state change

Hi,

On occasion when I unload and reload driver rtl8192ce, I get the message

"Refused to change power state, currently in D3"

I added additional info to the printk and discovered that it was trying to 
change to state D0. The problem seems to occur when I have made a connection, 
unloaded the driver, and reloaded it. If I do not make a connection before 
unloading, then the problem is a lot less likely.

This is with kernel 3.6-rc4 from wireless-testing. A Google search shows that 
the problem is usually due to suspend/resume difficulties, but this machine has 
not been suspended.

I would appreciate any help that you might give in solving this issue.

Thanks,

Larry
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