Comment 15 for bug 1767968

I use ubuntu 18.04 with 4.15 kernel
I have hit the same problem, but with synaptics touchpad.

I have bisected 4.13-4.14 and the problem was in commit 1455cf8dbfd06aa7651dcfccbadb7a093944ca65 (as in the attached patch)

I am unable to use USB bus because udev is bogged down with these bind/unbind events

```
UDEV [496.168312] bind /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4.2/2-1.4.2:1.0 (usb)
KERNEL[496.175932] bind /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4.2/2-1.4.2:1.0 (usb)
KERNEL[496.176947] unbind /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4.2/2-1.4.2:1.0 (usb)
UDEV [496.177602] unbind /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4.2/2-1.4.2:1.0 (usb)
KERNEL[496.185259] bind /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4.2/2-1.4.2:1.0 (usb)
KERNEL[496.185479] unbind /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4.2/2-1.4.2:1.0 (usb)
UDEV [496.186342] bind /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4.2/2-1.4.2:1.0 (usb)
KERNEL[496.196813] bind /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4.2/2-1.4.2:1.0 (usb)
KERNEL[496.197103] unbind /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4.2/2-1.4.2:1.0 (usb)
UDEV [496.197501] unbind /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4.2/2-1.4.2:1.0 (usb)
KERNEL[496.207283] bind /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4.2/2-1.4.2:1.0 (usb)
```

```
> cat /sys/bus/usb/devices/2-1.4/2-1.4.2/id*
8162
413c
```

```
> lsusb -d 413c:8162
Bus 002 Device 006: ID 413c:8162 Dell Computer Corp. Integrated Touchpad [Synaptics]
```