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

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Date:	Fri, 20 Apr 2012 17:09:48 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>
Cc:	Martin Mokrejs <mmokrejs@...d.natur.cuni.cz>,
	linux-pci@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: 3.2.11: PCI Express card cannot be re-detected withing cca 60sec timeframe

On Fri, Apr 20, 2012 at 4:17 PM, Sarah Sharp
<sarah.a.sharp@...ux.intel.com> wrote:
> On Fri, Apr 20, 2012 at 11:47:14AM -0700, Yinghai Lu wrote:
>> On Fri, Apr 20, 2012 at 10:28 AM, Martin Mokrejs
>> <mmokrejs@...d.natur.cuni.cz> wrote:
>> > [30720.175637] pciehp 0000:00:1c.7:pcie04: pcie_isr: intr_loc 108
>> > [30720.175639] pciehp 0000:00:1c.7:pcie04: LinkState change
>> > [30720.175643] pciehp 0000:00:1c.7:pcie04: lnk_status = 5011
>> > [30720.175644] pciehp 0000:00:1c.7:pcie04: Presence/Notify input change
>> > [30720.175648] pciehp 0000:00:1c.7:pcie04: Card not present on Slot(7)
>> > [30720.175687] pciehp 0000:00:1c.7:pcie04: Surprise Removal
>> > [30720.175718] pciehp 0000:00:1c.7:pcie04: Disabling domain:bus:device=0000:11:00
>> > [30720.175721] pciehp 0000:00:1c.7:pcie04: pciehp_unconfigure_device: domain:bus:dev = 0000:11:00
>> >
>>
>> So the USB host control driver xhci put that 11:00.0 in strange power state.
>
> 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?

Yinghai
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