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1What: Raise a uevent when a USB Host Controller has died2Date: 2019-04-173KernelVersion: 5.24Contact: linux-usb@vger.kernel.org5Description: When the USB Host Controller has entered a state where it is no6 longer functional a uevent will be raised. The uevent will7 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=offline13 BUSNUM=00214 DEVNAME=/dev/bus/usb/002/00115 DEVNUM=00116 DEVPATH=/devices/pci0000:00/0000:00:10.0/usb217 DEVTYPE=usb_device18 DRIVER=usb19 ERROR=DEAD20 MAJOR=18921 MINOR=12822 PRODUCT=1d6b/2/41423 SEQNUM=216824 SUBSYSTEM=usb25 TYPE=9/0/126 27Users: chromium-os-dev@chromium.org28