Re: UHCI/EHCI interrupt storm after resume from S3

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On Tue, 19 Mar 2013, Waskiewicz Jr, Peter P wrote:

> On 3/18/2013 1:35 PM, Greg KH wrote:
> > On Mon, Mar 18, 2013 at 01:30:47PM -0700, Waskiewicz Jr, Peter P wrote:
> >> I have an Atom-based machine (N450) with an ICH8 running Ubuntu LTS
> >> 12.04.2.  This has the latest updates installed, kernel 3.5.0-23.35.
> >> I put the machine into S3, then woke it from the network.  After
> >> resume, the uhci_hcd and ehci_hcd devices (sharing an interrupt)
> >> start flooding interrupts.  This continues until the USB driver is
> >> reloaded, or I reboot.
> >>
> >> Is this a known issue?  I'm willing to assist debugging, I just
> >> wanted to ask if people have seen this yet before I dig into it.  If
> >> it comes down to building linux-next via git, that's fine, it'll
> >> just take about 4 hours on this box to do it.
> >>
> >> Let me know if there's any additional data folks want to see.
> >
> > Can you see if this happens with the latest 3.8.3 kernel release?  If
> > you are stuck using Ubuntu kernels, you need to get support from
> > Canonical, there's nothing we can do with their kernel packages, sorry.
> 
> Ok, I take back my previous mail that it's ok with 3.8.3.  The bug is 
> still there, albeit it's intermittent.  After 4-5 suspend/resumes on 
> this box, the ehci_hcd and uhci_hcd (shared fasteoi interrupt) are 
> flooding interrupts.
> 
> More information:
> 
> USB controller: Intel ICH8, PCI ID 0x2830 - 0x2836
> BIOS: AMI version 080015
> Processor: Atom D510
> 
> Any other info I can provide if requested.  Anything anyone would like 
> me to try, just let me know.

While going through old email messages, I found this.  Did the problem 
ever get fixed, or is it still present in the 3.9 kernel?

Alan Stern

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