linux-kernel - Re: [BUGREPORT] Linux USB 3.0

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Date:	Tue, 11 Feb 2014 20:32:25 +0100
From:	Markus Rechberger <mrechberger@...il.com>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	Robert Hancock <hancockrwd@...il.com>,
	David Laight <David.Laight@...lab.com>,
	Sarah Sharp <sarah.a.sharp@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>,
	USB list <linux-usb@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>
Subject: Re: [BUGREPORT] Linux USB 3.0

On Tue, Feb 11, 2014 at 7:45 PM, Greg KH <gregkh@...uxfoundation.org> wrote:
> On Tue, Feb 11, 2014 at 07:29:47PM +0100, Markus Rechberger wrote:
>> On Mon, Feb 10, 2014 at 12:15 AM, Robert Hancock <hancockrwd@...il.com> wrote:
>> > On 08/02/14 03:00 AM, Markus Rechberger wrote:
>> >>
>> >> On Tue, Feb 4, 2014 at 10:31 AM, David Laight <David.Laight@...lab.com>
>> >> wrote:
>> >>>
>> >>> From: Markus Rechberger
>> >>>>>>
>> >>>>>> Dec 27 23:23:50 solist kernel: [   36.118245] xhci_hcd 0000:00:14.0:
>> >>>>>> ERROR Transfer event TRB DMA
>> >>>>
>> >>>> ptr
>> >>>>>
>> >>>>>
>> >>>>> These messages might be harmless.  The 3.0 kernel contains a fix for
>> >>>>> Intel Panther Point xHCI hosts that suppresses those messages, commit
>> >>>>> ad808333d8201d53075a11bc8dd83b81f3d68f0b "Intel xhci: Ignore spurious
>> >>>>> successful event."
>> >>>>>
>> >>>>> A later commit extends that to all xHCI 1.0 hosts, commit
>> >>>>> 07f3cb7c28bf3f4dd80bfb136cf45810c46ac474 "usb: host: xhci: Enable
>> >>>>> XHCI_SPURIOUS_SUCCESS for all controllers with xhci 1.0"  That was
>> >>>>> queued for 3.11 and marked to be backported into stable kernels as old
>> >>>>> as 3.0.
>> >>>
>> >>>
>> >>> I see the same error message on the 0.96 ASMedia controller when
>> >>> the rx buffers for the ax88179_178a driver cross 64k boundaries.
>> >>>
>> >>> So this isn't confined to 1.0 controllers.
>> >>>
>> >>
>> >> Sarah,
>> >>
>> >> since there is no response yet, is there anyone at Intel dedicated at
>> >> working on USB 3.0?
>> >> We are also getting more and more negative USB 3.0 feedback with Linux
>> >
>> >
>> > Still nobody appears to have provided the requested debugging information
>> > that was requested. So there is not much that can be done upstream to debug
>> > things based only on vague reports, especially when not using current kernel
>> > versions.
>> >
>>
>> Next kernel crash report, this time a Synology NAS System:
>> http://support.sundtek.com/index.php/topic,1511.0.html
>
> That kernel has a closed source kernel module loaded, no community
> member can look at it, sorry, please get support from the company that
> wrote that module.
>

I'm going to collect all XHCI issues we get here as a reference,
unfortunately we're busy with our own hardware so we don't have the
time to dig into USB 3.0 Kernel issues at the moment. All that can be
done is collecting the feedback and maybe help to translate between
German and English. So if someone wants to volunteer to fix some
issues (eg Intel) just drop me a line. As Sarah indicated there are
already several issues mentioned within this post.

Markus
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