[libvirt] USB hostdev de/reattaching
Hello, according to libvirt documentation, when using hostdev with USB device "...the user is responsible to call virNodeDeviceDettach (or virsh nodedev-detach) before starting the guest...". In libvirt-1.2.13-1.el7.x86_64, this leads to virsh nodedev-detach usb_usb1 error: Failed to detach device usb_usb1 error: invalid argument: device usb_usb1 is not a PCI device The failure is most probably caused in qemuNodeDeviceDeta where qemuNodeDeviceGetPCIInfo is called. Is it a bug, or usb hostdev can be done without detaching/reattaching? Thanks, mpolednik
On Thu, Mar 19, 2015 at 06:12:44AM -0400, Martin Polednik wrote:
Hello,
according to libvirt documentation, when using hostdev with USB device "...the user is responsible to call virNodeDeviceDettach (or virsh nodedev-detach) before starting the guest...". In libvirt-1.2.13-1.el7.x86_64, this leads to
virsh nodedev-detach usb_usb1
error: Failed to detach device usb_usb1 error: invalid argument: device usb_usb1 is not a PCI device
The failure is most probably caused in qemuNodeDeviceDeta where qemuNodeDeviceGetPCIInfo is called. Is it a bug, or usb hostdev can be done without detaching/reattaching?
USB devices do not need to be detached/reattached explicitly, it's all automatic. And since qemuNodeDeviceDettach has always required a PCI device (see commit 34d23b0), I think this is a documentation bug, introduced by commit 10d3272. Jan
participants (2)
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Ján Tomko -
Martin Polednik