2:14 a.m.
Sometimes, qemu cannot find correct usb device number
Reproduce steps:
1、lsusb
Bus 001 Device 011: ID 090c:1000
1、prepare usb device attach xml
<hostdev managed="yes" mode="subsystem" type="usb">
<source>
<vendor id="0x090c" />
<product id="0x1000" />
<address bus='001' device='011'/>
</source><address bus="1" port="1" type="usb"
/>
</hostdev>
2、virsh attach-device vm usb.xml
error: internal error: Did not find USB device 090c:1000 bus:1 device 9
Question:
why the device number returned in qemu's error report is not what I wrote in xml，
what I mean is that if my dev number is really wrong, the returned error should also be
the number I wrote，
commonly when using dongle
Look forward to your reply
yaohua.wu
2:23 a.m.
New subject: 回复: Cannot passthrough usb with bus number and device number
Version:
# libvirtd --version
libvirtd (libvirt) 4.9.0
# qemu-img --version
qemu-img version 2.12.0 (qemu-kvm-ev-2.12.0-44.1.el7_9.1)
Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers
yaohua.wu
发件人： YaoHua Wu
发送时间： 2020-12-08 16:14
收件人： libvirt-users
主题： Cannot passthrough usb with bus number and device number
Sometimes, qemu cannot find correct usb device number
Reproduce steps:
1、lsusb
Bus 001 Device 011: ID 090c:1000
1、prepare usb device attach xml
<hostdev managed="yes" mode="subsystem" type="usb">
<source>
<vendor id="0x090c" />
<product id="0x1000" />
<address bus='001' device='011'/>
</source><address bus="1" port="1" type="usb"
/>
</hostdev>
2、virsh attach-device vm usb.xml
error: internal error: Did not find USB device 090c:1000 bus:1 device 9
Question:
why the device number returned in qemu's error report is not what I wrote in xml，
what I mean is that if my dev number is really wrong, the returned error should also be
the number I wrote，
commonly when using dongle
Look forward to your reply
yaohua.wu
3:11 a.m.
On 08.12.20 09:14, YaoHua Wu wrote:
Sometimes, qemu cannot find correct usb device number
Reproduce steps:
1、lsusb
Bus 001 Device 011: ID 090c:1000
1、prepare usb device attach xml
<hostdev managed="yes" mode="subsystem" type="usb">
<source>
<vendor id="0x090c" />
<product id="0x1000" />
<address bus='001' device='011'/>
</source><address bus="1" port="1" type="usb"
/>
</hostdev>
2、virsh attach-device vm usb.xml
error: internal error: Did not find USB device 090c:1000 bus:1 device 9
Question:
why the device number returned in qemu's error report is not what I
wrote in xml，
what I mean is that if my dev number is really wrong, the returned error
should also be the number I wrote，
commonly when using dongle
Looks like the number 011 in your device='011' is interpreted as octal
number: 1x8 + 1x1 = 9 in decimal
Best regards
Andreas
--
Andreas Tscharner sternenfeuer(a)gmail.com
------------------------------------------------------------------------
Der entscheidende Vorteil eines Chats gegenueber einem normalen Telefon-
anruf ist der, dass ersterer langsamer geht und mehr kostet (fuer den
lebenswichtigen Austausch von Informationen wie "hya folks", "C U
l8er" und ":-)") ... Aus Murphy's
Computergesetzen
8:12 a.m.
Yes, I checked the libvirt code and found that the strtoul function is used to do the
hexadecimal conversion, thank you for your reply :)
yaohua.wu(a)zstack.io
From： YaoHua Wu
Date： 2020-12-08 16:14
To： libvirt-users
Subject： Cannot passthrough usb with bus number and device number
Sometimes, qemu cannot find correct usb device number
Reproduce steps:
1、lsusb
Bus 001 Device 011: ID 090c:1000
1、prepare usb device attach xml
<hostdev managed="yes" mode="subsystem" type="usb">
<source>
<vendor id="0x090c" />
<product id="0x1000" />
<address bus='001' device='011'/>
</source><address bus="1" port="1" type="usb"
/>
</hostdev>
2、virsh attach-device vm usb.xml
error: internal error: Did not find USB device 090c:1000 bus:1 device 9
Question:
why the device number returned in qemu's error report is not what I wrote in xml，
what I mean is that if my dev number is really wrong, the returned error should also be
the number I wrote，
commonly when using dongle
Look forward to your reply
yaohua.wu
1449
days inactive
1449
days old
3 comments
2 participants
participants (2)
-
Andreas Tscharner -
YaoHua Wu