1What: Raise a uevent when a USB Host Controller has died 2Date: 2019-04-17 3KernelVersion: 5.2 4Contact: linux-usb@vger.kernel.org 5Description: When the USB Host Controller has entered a state where it is no 6 longer functional a uevent will be raised. The uevent will 7 contain ACTION=offline and ERROR=DEAD. 8 9 Here is an example taken using udevadm monitor -p:: 10 11 KERNEL[130.428945] offline /devices/pci0000:00/0000:00:10.0/usb2 (usb) 12 ACTION=offline 13 BUSNUM=002 14 DEVNAME=/dev/bus/usb/002/001 15 DEVNUM=001 16 DEVPATH=/devices/pci0000:00/0000:00:10.0/usb2 17 DEVTYPE=usb_device 18 DRIVER=usb 19 ERROR=DEAD 20 MAJOR=189 21 MINOR=128 22 PRODUCT=1d6b/2/414 23 SEQNUM=2168 24 SUBSYSTEM=usb 25 TYPE=9/0/1 26 27Users: chromium-os-dev@chromium.org 28