linux-kernel - Re: 3.2.11: PCI Express card cannot be re-detected withing cca 60sec timeframe

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Message-ID: <CAE9FiQWLmiqg_8PQXYsccxqrvwEp5zhGLcEpsN-nAJq=1zTZ7Q@mail.gmail.com>
Date:	Fri, 20 Apr 2012 21:46:41 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Martin Mokrejs <mmokrejs@...d.natur.cuni.cz>
Cc:	linux-pci@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Sarah Sharp <sarah.a.sharp@...ux.intel.com>
Subject: Re: 3.2.11: PCI Express card cannot be re-detected withing cca 60sec timeframe

On Fri, Apr 20, 2012 at 5:09 PM, Yinghai Lu <yinghai@...nel.org> wrote:
>> What do you mean "strange power state"?  The only PCI power states the
>> xHCI driver will use is D0 or D3hot.  D3hot is entered automatically by
>> the USB core runtime PM system when all USB devices are disconnected or
>> suspended.  So what strange power state are we talking about?
>
> that's helpful. Can that feature to be disabled?

please check and set
/sys/bus/pci/devices/0000:11:00.0/power/control
/sys/bus/pci/devices/0000:11:00.0/usb?/power/control
from auto to on

Yinghai
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