linux-kernel - Re: Sleeping function called from invalid context in 2.6.37 xhci

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Message-ID: <20110106080025.GA27255@xanatos>
Date:	Thu, 6 Jan 2011 00:00:25 -0800
From:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>
To:	Robert Hancock <hancockrwd@...il.com>
Cc:	Greg KH <gregkh@...e.de>, Linux-usb <linux-usb@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Sleeping function called from invalid context in 2.6.37
 xhci_hcd

On Wed, Jan 05, 2011 at 06:59:59PM -0600, Robert Hancock wrote:
> On Wed, Jan 5, 2011 at 6:30 PM, Greg KH <gregkh@...e.de> wrote:
> > On Wed, Jan 05, 2011 at 06:22:03PM -0600, Robert Hancock wrote:
> >> Just saw this on booting up on the latest Fedora Rawhide kernel
> >> based on 2.6.37. Looks like we were trying to do a runtime suspend
> >> on the xHCI USB controller and it disabled MSI-X while interrupts
> >> were disabled?
> >
> > Known issue, patches came in too late to make it for .37, hopefully will
> > show up in .38-rc and then get backported to .37.  They are on the
> > linux-usb mailing list if you need them now.
> 
> Not sure if it's related to this issue or not, but I also noticed the
> USB 3.0 card wasn't detecting any connected devices until I disabled
> USB autosuspend on the controller through sysfs (which is enabled by
> default in that Fedora Rawhide kernel)..

There's a couple more patches to deal with some issues with
disconnecting a USB device (or safely removing a USB mass storage
device) when the bus is suspended.  See the patches starting in this
thread:

http://marc.info/?l=linux-usb&m=129421308020494&w=2

Try applying the first five patches and let me know if you still see any
issues.  The fourth patch has a known compile warning (it will get fixed
shortly) but you shouldn't run into that particular error path.

Sarah Sharp
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