Re: [Qemu-devel] [5050] uhci: rewrite UHCI emulator, fully async operation with multiple outstanding transactions ( Max Krasnyansky)

[Aurelien Jarno]

On Thu, Aug 21, 2008 at 05:26:49PM -0700, Max Krasnyansky wrote:
> Anthony Liguori wrote:
>> Aurelien Jarno wrote:
>>> On Thu, Aug 21, 2008 at 07:30:32PM +0000, Anthony Liguori wrote:
>>>  
>>>> Revision: 5050
>>>>           http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5050
>>>> Author:   aliguori
>>>> Date:     2008-08-21 19:30:31 +0000 (Thu, 21 Aug 2008)
>>>>
>>>> Log Message:
>>>> -----------
>>>> uhci: rewrite UHCI emulator, fully async operation with multiple  
>>>> outstanding transactions (Max Krasnyansky)
>>>>     
>>>
>>> Please note that this commit has broken the -usbdevice option (at least
>>> disk, tablet and mouse) for a GNU/Linux guest running a 2.6.18 kernel.
>>>   
>> Well, reverting is going to be painful since this is the 4th patch in a 
>> series of 8, so I'll try to fix this tonight, otherwise, I'll revert.
>
> I've done all my testing so far with XP as a guest, and the -usbdevice  
> tablet is working just fine. In fact nothing should have changed in that  
> area since builtin devices are synchronous.
>
> I'll setup Linux guest right now and check things out.
>
> Aurelien, can you provide a bit more details on your setup. Do use KQEMU  
> or KVM ? Since you mentioned table & mouse I'm assuming that you're  
> using a graphic console. Is it VNC or SDL ?. In fact why don't you just  
> send me your qemu command like. So that I can replicated the problem 
> better.
>

I am using QEMU, from the SVN, without KQEMU. The problem does not
depend of the console used (SDL, VNC or curses). The guest kernel 
outputs the following errors:
usb 1-2: device not accepting address 2, error -71
usb 1-2: new full speed USB device using uhci_hcd and address 3
usb 1-2: device not accepting address 3, error -71
usb 1-2: new full speed USB device using uhci_hcd and address 4
usb 1-2: device not accepting address 4, error -71
usb 1-2: new full speed USB device using uhci_hcd and address 5
usb 1-2: device not accepting address 5, error -71

You can download the image from:
http://people.debian.org/~aurel32/qemu/amd64/

It is reproducible with the following command line:
qemu-system-x86_64 -hda debian_etch_amd64_small.qcow -usbdevice tablet          
                                

The error can also be reproduced with -usbdevice mouse or -usbdevice 
disk:image.

-- 
  .''`.  Aurelien Jarno             | GPG: 1024D/F1BCDB73
 : :' :  Debian developer           | Electrical Engineer
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