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a4d6a2989d
This change will send an OFFLINE event to udev with the ERROR=DEAD environment variable set when the HC dies. By notifying user space the appropriate policies can be applied. i.e., * Collect error logs. * Notify the user that USB is no longer functional. * Perform a graceful reboot. Reported-by: kbuild test robot <lkp@intel.com> Signed-off-by: Raul E Rangel <rrangel@chromium.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
27 lines
733 B
Text
27 lines
733 B
Text
What: Raise a uevent when a USB Host Controller has died
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Date: 2019-04-17
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KernelVersion: 5.2
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Contact: linux-usb@vger.kernel.org
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Description: When the USB Host Controller has entered a state where it is no
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longer functional a uevent will be raised. The uevent will
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contain ACTION=offline and ERROR=DEAD.
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Here is an example taken using udevadm monitor -p:
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KERNEL[130.428945] offline /devices/pci0000:00/0000:00:10.0/usb2 (usb)
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ACTION=offline
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BUSNUM=002
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DEVNAME=/dev/bus/usb/002/001
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DEVNUM=001
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DEVPATH=/devices/pci0000:00/0000:00:10.0/usb2
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DEVTYPE=usb_device
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DRIVER=usb
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ERROR=DEAD
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MAJOR=189
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MINOR=128
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PRODUCT=1d6b/2/414
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SEQNUM=2168
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SUBSYSTEM=usb
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TYPE=9/0/1
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Users: chromium-os-dev@chromium.org
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