linux-kernel - Re: WARNING: at drivers/usb/host/ehci-hcd.c:287

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Date:	Mon, 3 Mar 2008 23:38:55 +0100 (CET)
From:	Christian Kujau <lists@...dbynature.de>
To:	LKML <linux-kernel@...r.kernel.org>
cc:	0x0007@...il.com, linux-usb@...r.kernel.org
Subject: Re: WARNING: at drivers/usb/host/ehci-hcd.c:287

On Mon, 3 Mar 2008, Christian Kujau wrote:
> after upgrading to 2.6.25-rc3, kern.log shows:
>
> [ 1535.884848] ------------[ cut here ]------------
> [ 1535.884855] WARNING: at drivers/usb/host/ehci-hcd.c:287

Hm, after ~24h of uptime, this message appeared 25 times already.
The WLAN USB device was used the whole time, the usb-storage module
was hardly used over the day:

# grep usb /proc/interrupts
  10:   10693403    XT-PIC-XT        ohci_hcd:usb3, eth0
  11:   10270770    XT-PIC-XT        sym53c8xx, ehci_hcd:usb1
  12:         91    XT-PIC-XT        ohci_hcd:usb2

I even tried to trigger the system freeze[0] by using usb-storage
and reading a lot from it, but no freeze, and the message could
not be triggered either - they pop up every now and then, but too often, 
IMHO.

Can anybody shed some light on this?

Thanks,
Christian.

[0] http://lkml.org/lkml/2008/2/13/566
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