Re: [Qemu-devel] [PATCH] usb-redir: Allow to attach USB 2.0 devices to 1.1 host controller

[Jan Kiszka <jan.kiszka@siemens.com>]

On 2012-09-18 11:41, Hans de Goede wrote:
> Hi,
> 
> On 09/17/2012 06:22 PM, Jan Kiszka wrote:
>>> If that does not work, add the debug parameter to the usb-redir device,
>>> set it
>>> to 4, collect logs of trying to redirect the device and send me the logs
>>> please, ie:
>>> -device usb-redir,chardev=usbredirchardev1,id=usbredirdev1,debug=4
>>>
>>> Also be aware that usb-redir relies on chardev flowcontrol working,
>>> which it does not upstream! See for example here for the chardev flow
>>> control patch set which RHEL / Fedora carry:
>>> http://cgit.freedesktop.org/~jwrdegoede/qemu/log/?h=qemu-kvm-1.2-usbredir&ofs=50
>>>
>>>
>>> And then the first 13 patches after: "Merge tag 'v1.2.0'"
>>>
>>> Oh, and also, if you're running qemu git master, make sure you've:
>>> http://cgit.freedesktop.org/~jwrdegoede/qemu/commit/?id=81e34f5973d8d6a1ef998a50c4a4bf66abb3b56b
>>>
>>
>> I used qemu-kvm-1.2-usbredir^ (the last commit is apparently broken -
>> copy&paste bug?).
> 
> Yeah, that has been fixed now.
> 
>> I'm getting this right after typing cat /dev/ACM0 in
>> the guest. It's an endless stream, and so is the output in the guest
>> although there should be nothing to dump (that's the proper behaviour on
>> the host).
> 
> Hmm, can you try commenting out line 1608 of hw/usb/redirect.c:
>              usb_ep->pipeline = true;
> 
> And see if that helps. If it does not help, please bump the debug level to 5
> (this will also make it log packet contents), and then generate another log, and
> then it is time to dive into the ACM protocol to see what is happening...

As it looks like now, I was just using the wrong test on the guest side.
Retried this morning briefly with a terminal program, and it was all
fine, even when forwarding from host-ehci to guest-uhci (with my broken
patch), even when using current QEMU git head. Sorry for the noise

Jan

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