Hi, Gerd
My Qemu version is 1.5.1, and use libusb for usb pass through.
I pass through a host usb device to the guest by bus number and
physical port, when I unplug the usb device from
the host, and plug in on the same physical port immediately, but the usb device
don't show up in the guest.
The qemu log show:
libusb_release_interface: -4 [NO_DEVICE]
libusbx: error [_get_usbfs_fd] libusbx couldn't open USB device
/dev/bus/usb/002/004: No such file or directory
libusbx: error [_get_usbfs_fd] libusbx couldn't open USB device
/dev/bus/usb/002/004: No such file or directory
libusbx: error [_get_usbfs_fd] libusbx couldn't open USB device
/dev/bus/usb/002/004: No such file or directory
I find the reason is that the global libusb_context has recorded the
usb devices' devnum, but when the host device was unplugged and plugged
from the host, the devnum will change, finally cause the problem.
Any ideas ? Thanks!
Best Regards!
-Gonglei
