linux-kernel - Re: [V4.0.0-rc3] Xhci Regression: ERROR Transfer event TRB DMA ptr not part of current TD

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Date:	Tue, 10 Mar 2015 15:03:45 +0100
From:	Jörg Otte <jrg.otte@...il.com>
To:	Mathias Nyman <mathias.nyman@...ux.intel.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	USB list <linux-usb@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>
Subject: Re: [V4.0.0-rc3] Xhci Regression: ERROR Transfer event TRB DMA ptr
 not part of current TD

2015-03-10 14:06 GMT+01:00 Mathias Nyman <mathias.nyman@...ux.intel.com>:
> On 10.03.2015 11:40, Jörg Otte wrote:
>> If I plug in my USB DVB-T stick I get the following in dmesg:
>>
>> dvb-usb: found a 'TerraTec/qanu USB2.0 Highspeed DVB-T Receiver' in warm state.
>> dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
>> DVB: registering new adapter (TerraTec/qanu USB2.0 Highspeed DVB-T Receiver)
>> usb 1-1: DVB: registering adapter 0 frontend 0 (TerraTec/qanu USB2.0
>> Highspeed DVB-T Receiver)...
>> input: IR-receiver inside an USB DVB receiver as
>> /devices/pci0000:00/0000:00:14.0/usb1/1-1/input/input17
>> dvb-usb: schedule remote query interval to 50 msecs.
>> xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA ptr not part of
>> current TD ep_index 1 comp_code 1
>> xhci_hcd 0000:00:14.0: Looking for event-dma 0000000207540400
>> trb-start 0000000207540420 trb-end 0000000207540420 seg-start
>> 00000002075404
>> xhci_hcd 0000:00:14.0: ERROR Transfer event TRB DMA ptr not part of
>> current TD ep_index 1 comp_code 1
>> xhci_hcd 0000:00:14.0: Looking for event-dma 0000000207540410
>> trb-start 0000000207540420 trb-end 0000000207540420 seg-start
>> 00000002075404
>> dvb-usb: bulk message failed: -110 (2/0)
>>
>> and DVB-T is not functional. The problem came in with:
>>
>> 1163d50 Merge tag 'usb-4.0-rc3' of
>> git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
>>
>> I never had this xhci_hcd error before so this is a regression.
>>
>>
>> Thanks, Jörg
>
> Oh, thanks.
>
> Looks like we get an event for a TRB we just moved past.
>
> Any chance you could take a log with xhci debugging enabled before attaching the DVB-T
> stick?
>
> echo -n 'module xhci_hcd =p' > /sys/kernel/debug/dynamic_debug/control
>
>

here it comes attached.


> I'd suspect one of these two patches:
>
> commit 45ba2154d12fc43b70312198ec47085f10be801a
>     xhci: fix reporting of 0-sized URBs in control endpoint
>
> commit 27082e2654dc148078b0abdfc3c8e5ccbde0ebfa
>     xhci: Clear the host side toggle manually when endpoint is 'soft reset'
>
> -Mathias
>

Thanks, Jörg

Download attachment "xhci-debug.gz" of type "application/x-gzip" (22035 bytes)