Re: ITE9135 on AMD SB700 - ehci_hcd bug

[Antti Palosaari <crope@iki.fi>]

On 10/03/2012 01:55 PM, Marx wrote:
> On 23.09.2012 18:22, Antti Palosaari wrote:
>> On 09/16/2012 05:23 PM, Antti Palosaari wrote:
>>> On 09/12/2012 09:32 AM, Marx wrote:
>>>> Hello
>>>> I'm trying to use dual DVB-T tuner based on ITE9135 tuner. I use Debian
>>>> kernel 3.5-trunk-686-pae. My motherboard is AsRock E350M1 (no USB3
>>>> ports).
>>>> Tuner is detected ok, see log at the end of post.
>>>>
>>>> When I try to scan channels, bug happens:
>>>> Sep 11 17:16:31 wuwek kernel: [ 209.291329] ehci_hcd 0000:00:13.2:
>>>> force halt; handshake f821a024 00004000 00000000 -> -110
>>>> Sep 11 17:16:31 wuwek kernel: [ 209.291401] ehci_hcd 0000:00:13.2: HC
>>>> died; cleaning up
>>>> Sep 11 17:16:31 wuwek kernel: [ 209.291606] usb 2-3: USB disconnect,
>>>> device number 2
>>>> Sep 11 17:16:41 wuwek kernel: [ 219.312848] dvb-usb: error while
>>>> stopping stream.
>>>> Sep 11 17:16:41 wuwek kernel: [ 219.320585] dvb-usb: ITE 9135(9006)
>>>> Generic successfully deinitialized and disconnected.
>>>>
>>>> After trying many ways I've read about problems with ehci on SB700
>>>> based
>>>> boards and switched off ehci via command
>>>> sh -c 'echo -n "0000:00:13.2" > unbind'
>>>> and now ehci bug doesn't happen. Of course I can see only one tuner and
>>>> in slower USB mode (see log at the end). But now I can scan succesfully
>>>> without any errors.
>>>>
>>>> Of course it isn't acceptable fix for my problem. Drivers for ITE9135
>>>> seems ok, but there is a problem with ehci_hcd on my motherboard.
>>>> I would like to know what can I do to fix my problem.
>>>
>>> I am quite sure dvb_usb_v2 fixes that. Test latest tree.
>>>
>>> Antti
>>>
>>
>> Test results please?
>
> I've replaced motherboard (no AMD chipset) and this problem disappeared.
> Unfortunatelly there were some problem with newsgate on gmane and I
> didn't receive your reply on time. Now I don't have this motherboard,
> but I can confirm ITE9135 drivers now works ok, so this problem was with
> USB driver.

I have also AMD SB700 USB bridge and saw these errors. I suspect it race 
condition in DVB USB which happens in certain situation / combinations. 
I added one mutex to DVB USB v2 due to that...

> Now I have some small problem with ITE9135 driver. I use dual tuner.
> When I restart computer while the card is connected then disconnect and
> connect card again, I have four devices in /dev/dvb instead of two.
> Is it known bug and is fixed or I should attach some logs?
> Marx

New for me. It could be ITE9135 driver bug or DVB USB bug. I have to 
test it.

regards
Antti

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