network: 0.820
device: 0.796
performance: 0.654
peripherals: 0.613
semantic: 0.610
mistranslation: 0.588
debug: 0.483
graphic: 0.401
assembly: 0.342
files: 0.304
architecture: 0.280
arm: 0.251
TCG: 0.164
VMM: 0.156
vnc: 0.156
boot: 0.149
risc-v: 0.142
hypervisor: 0.118
ppc: 0.116
permissions: 0.106
socket: 0.105
user-level: 0.083
virtual: 0.074
KVM: 0.043
PID: 0.031
i386: 0.031
register: 0.030
x86: 0.019
kernel: 0.017

Assert xfer->packet.status != USB_RET_NAK in xhci