serial usb-device can't be passed-through to a guest

[Nico Prenzel]

Hello,

I use Debian Lenny with qemu/kvm version 79. If I try to pass-through my "US Robotics 56K USB Modem Model 5637" to any guest, I get an perror("usb_linux_update_endp_table").
So, I've searched through the qemu-devel archives and found the following thread:
http://<email address hidden>/2008-10/msg00299.html
If I remove the "return 1;" as stated above my usb modem get's successfully passed-through to the guest and the modem works fine.
Is there any chance to get serial usb devices to work out of standard qemu/kvm, without the need to apply this line to every qemu/kvm version?

NicoP.

[Laurent (syrius-no-log)]

it is reproduced here with jaunty and kvm 1:84+dfsg-0ubuntu12

[Laurent (syrius-no-log)]

but the patch doesn't work here

[Nico Prenzel (nico-prenzel)]

Did you really patch the right code section?
I do remember that there has been a similarly code above/below that confused me with my first try to patch.

[Fabrizio Pezzella (fabrizio-pezzella)]

Hi,

i have the same problem with CentOS 5.4 2.6.18-164.11.1.el5 x86, the usb key it's a "Active Key"

kvm-83-105.el5_4.13
qemu-0.10.6-1.el5.rf

dmesg
hiddev97: USB HID v1.10 Device [Eutron InfoSecurity SmartKey 3 DL] on usb-0000:00:1a.1-1.2

lsusb
Bus 004 Device 003: ID 073d:0026 Eutron S.p.a.

tail -f /var/log/libvirt/qemu/w2k3.log
usb_linux_update_endp_table: Broken pipe
Warning: could not add USB device host:073d:0026

There is a fix for this bug ?

Tnx
Fabrizio Pezzella

[Nico Prenzel (nico-prenzel)]

Yes,
to fix this problem use a newer kvm (or better qemu-kvm).

The fix within my first post worked too, at least for me.

Thanks.
NicoP

[Nico Prenzel (nico-prenzel)]

Hello Anthony,

which qemu-kvm version do you expect to work with serial usb devices?

After you've changed this ticket status and I've checked it again with qemu-kvm version 0.12.4. The reported error message is gone away and the device is present in the guest. The cdc_acm driver loads too without any visible problems, but the device is still unusable.
The device data led flash if it gets un/initialized by minicom.
But if I try to make a test dial, nothing happens after I call a phone number.

To be more precise:
-host dosn't have loaded the cdc_acm driver
-guest loads the cdc_acm driver
-a dial with minicom to the same phone number works on the host, if I load the cdc_acm within the host

I would like to get this fixed, as I really want to use this usb-device as my dusty fax again.