On Do, 2015-06-11 at 23:47 +0800, Lin Ma wrote: > Hi Gerd, > > Based on the current implementation of 'usb_host_open' in > hw/usb/host-libusb.c, > > When user performs usb_add, The usb device will be detached from kernel > first, Then be checked for speed mismatch second. > If it found speed mismatch, The usb device isn't attached to guest, But > the usb device can't be reattached to kernel either. > > I'd like to write patch to add 'usb_check_attach' before detaching the > device from kernel _or_ add 'usb_host_attach_kernel' under 'fail:' of > usb_host_open, (the latter doesn't make sense I think).
Re-attach to the kernel when open fails (for whatever reasons) makes perfect sense to me. cheers, Gerd
