device: 0.930
graphic: 0.821
instruction: 0.799
semantic: 0.638
vnc: 0.503
socket: 0.368
boot: 0.346
other: 0.331
mistranslation: 0.261
network: 0.248
assembly: 0.113
KVM: 0.032

vmmouse device gets attached twice, one without i8042 associated
Description of problem:
I'm developing [a driver for the VMware mouse device](https://github.com/NattyNarwhal/vmwmouse). I know this works properly on VMware, but I'm trying it in QEMU too.

[My full notes](https://github.com/NattyNarwhal/vmwmouse/issues/1), but most relevant is:

* a vmmouse instance gets initialized twice (confirmed in qtree), one with i8042 the first time, one without the second time
* the second vmmouse instance is the one receiving the events, passing them to the i8042 device's fake event handler
* obviously, a crash because ISAKBDDevice should never be null
Steps to reproduce:
1. Load VMware mouse driver
2. Move cursor (I recommend waiting until Windows loads before doing so, it is very easy to corrupt the guest filesystem if you do it while Windows is loading)
3. Crash