[Bug 1906653] [NEW] Backport systemd to make uevents "sticky"

[hugh chao]

Public bug reported:

Base on lwn 837033 [0], Linux 4.12 introduced two new uevents "bind" and
"unbind" to the Linux device model which resulted in a number of
software issues.

So in this PR [1] which minimize issues resulting from this kernel
change (but not avoid them entirely) by make uevent "sticky", meaning
that once a tag is assigned to a device it will not be removed from the
device again until the device itself is removed (i.e. unplugged).

[0] https://lwn.net/Articles/837033/
[1] https://github.com/systemd/systemd/pull/16853/files

** Affects: systemd (Ubuntu)
     Importance: Undecided
         Status: New

** Description changed:

  Base on lwn 837033 [0], Linux 4.12 introduced two new uevents "bind" and
  "unbind" to the Linux device model which resulted in a number of
  software issues.
  
- So in this PR [1] which minimize issues resulting from this kernel change (but not avoid them entirely) by make uevent "sticky", meaning that once a tag is assigned to a device it will not
- be removed from the device again until the device itself is removed (i.e. unplugged). 
- 
+ So in this PR [1] which minimize issues resulting from this kernel
+ change (but not avoid them entirely) by make uevent "sticky", meaning
+ that once a tag is assigned to a device it will not be removed from the
+ device again until the device itself is removed (i.e. unplugged).
  
  [0] https://lwn.net/Articles/837033/
  [1] https://github.com/systemd/systemd/pull/16853/files

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https://bugs.launchpad.net/bugs/1906653

Title:
  Backport systemd to make uevents "sticky"

Status in systemd package in Ubuntu:
  New

Bug description:
  Base on lwn 837033 [0], Linux 4.12 introduced two new uevents "bind"
  and "unbind" to the Linux device model which resulted in a number of
  software issues.

  So in this PR [1] which minimize issues resulting from this kernel
  change (but not avoid them entirely) by make uevent "sticky", meaning
  that once a tag is assigned to a device it will not be removed from
  the device again until the device itself is removed (i.e. unplugged).

  [0] https://lwn.net/Articles/837033/
  [1] https://github.com/systemd/systemd/pull/16853/files

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