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

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Message-ID: <CAErSpo7GEkN1XLZ=UeXmDZrLnp_648mH-sLYa9hMgOqz7t+b7Q@mail.gmail.com>
Date:	Fri, 7 Sep 2012 15:48:15 -0700
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Larry Finger <Larry.Finger@...inger.net>
Cc:	linux-pci@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	李朝明 <chaoming_li@...lsil.com.cn>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux PM list <linux-pm@...r.kernel.org>,
	Huang Ying <ying.huang@...el.com>
Subject: Re: Question about failure in PCI power-state change

+cc Rafael, Huang, linux-pm

On Fri, Sep 7, 2012 at 3:44 PM, Larry Finger <Larry.Finger@...inger.net> wrote:
> 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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