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* Re: Question about error from xhci-hcd
@ 2012-02-07  5:47 Richard Farina
  2012-02-07  9:52 ` Andiry Xu
  2012-02-07 13:30 ` Larry Finger
  0 siblings, 2 replies; 18+ messages in thread
From: Richard Farina @ 2012-02-07  5:47 UTC (permalink / raw)
  To: sarah.a.sharp, Larry Finger, andiry.xu; +Cc: linux-kernel

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.

Thanks,
Rick

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 
--

^ permalink raw reply	[flat|nested] 18+ messages in thread
* Question about error from xhci-hcd
@ 2011-10-29 17:48 Larry Finger
  2011-10-30  5:04 ` Sarah Sharp
  0 siblings, 1 reply; 18+ messages in thread
From: Larry Finger @ 2011-10-29 17:48 UTC (permalink / raw)
  To: Sarah Sharp; +Cc: USB list, LKML, v4mp

Sarah,

Pardon the intrusion, but I'm trying to fix a problem for v4mp, a user of the 
rtl8192cu driver on an Alfa AWUS036NHR. I have one of the devices, and it works 
on a USB 2.0 hub, but fails with 3.0 hardware with lots of

xhci_hcd 0000:05:00.0: ERROR no room on ep ring

messages logged.

The device works with an out-of-kernel driver available from the Alfa or Realtek 
web sites, but I want to fix rtl8192cu.

What condition leads to the above message? The user's dmesg buffer has wrapped, 
thus I don't see the beginning of the failure. He is using a canned distro 
kernel, thus he cannot include any extra debugging info such as a stack dump 
when the errors occur. As he uses the compat-wireless package, I think I can 
incorporate a new copy of xhci-hcd with it, but I have not done so yet.

Thanks for any help you can give,

Larry


^ permalink raw reply	[flat|nested] 18+ messages in thread

end of thread, other threads:[~2012-02-07 19:28 UTC | newest]

Thread overview: 18+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2012-02-07  5:47 Question about error from xhci-hcd Richard Farina
2012-02-07  9:52 ` Andiry Xu
2012-02-07 13:30 ` Larry Finger
2012-02-07 14:55   ` Sarah Sharp
2012-02-07 19:28     ` Larry Finger
2012-02-07 14:59   ` Richard Farina
  -- strict thread matches above, loose matches on Subject: below --
2011-10-29 17:48 Larry Finger
2011-10-30  5:04 ` Sarah Sharp
2011-10-30 15:30   ` Larry Finger
2011-11-01 16:06   ` Larry Finger
2011-11-14  9:18     ` Andiry Xu
2011-11-28 18:14       ` Sarah Sharp
2011-11-28 21:53         ` Larry Finger
2011-12-28 16:30       ` Larry Finger
2011-12-29  3:32         ` Andiry Xu
2011-12-29  3:55           ` Larry Finger
2011-12-29  4:30             ` Andiry Xu
2011-12-29 16:49               ` Larry Finger

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