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