linux-kernel - Re: Question about error from xhci-hcd

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Date:	Tue, 7 Feb 2012 17:52:12 +0800
From:	Andiry Xu <andiry.xu@....com>
To:	Richard Farina <sidhayn@...il.com>
CC:	<sarah.a.sharp@...ux.intel.com>,
	Larry Finger <Larry.Finger@...inger.net>,
	<linux-kernel@...r.kernel.org>
Subject: Re: Question about error from xhci-hcd

On 02/07/2012 01:47 PM, Richard Farina wrote:
> I apologize but I am having the same issue reported in this thread in
> December
> 
> [ 5077.573181] xhci_hcd 0000:0a:00.0: ERROR no room on ep ring
> 
> I saw no resolution on this issue so I figured I'd step up and see if
> you needed an active tester who could reproduce the issue.
> 
> I am running Gentoo with a 3.2.2 kernel.  I am able to run any kernel
> version you need, including random git trees and custom patches.  If you
> have not solved this yet, please allow me to be your test monkey. If you
> have solved this already then sorry for harming the signal to noise
> ratio, I could not a find a later message then the one below.
> 

You can try andiry-ring-expansion branch on Sarah's xhci git tree. It
contains bugs and I'm trying to fix that, but you can have a try.

Thanks,
Andiry

> 
> On 12/28/2011 10:30 PM, Andiry Xu wrote: 
>>
>> That's the error I want to see, but I didn't find it in the dmesg you 
>> posted. is it wrapped? 
>>
>> Anyway, please post the full dmesg with no room on ring error and the 
>> dump of the ep ring and event ring (so the xhci_debug_ring() is 
>> triggered in the patch), so we can see if the ring is mangled or there 
>> is just too many transfers. 
>>
>> Another thing you can try is the andiry-ring-expansion branch on Sarah's 
>> xhci git tree, check if there is still no room on ring error. 
> 
> No, the ring is not wrapped. I seems that my anti-spam mechanism kicked
> in too 
> soon. or the run stopped too soon. 
> 
> I'll have the OP do another run and see if we can get the right
> information. 
> 
> Larry 
> --
> 
> 


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