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usb/hcd: Send a uevent signaling that the host controller had died

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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>
This commit is contained in:
Raul E Rangel
2019-04-19 09:30:22 -06:00
committed by Greg Kroah-Hartman
parent cf28369c63
commit a4d6a2989d
3 changed files with 52 additions and 0 deletions
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include/linux/usb/hcd.h
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@@ -98,6 +98,7 @@ struct usb_hcd {
#ifdef CONFIG_PM
struct work_struct wakeup_work; /* for remote wakeup */
#endif
struct work_struct died_work; /* for when the device dies */
/*
* hardware info/state