** Description changed:
+ [impact]
+
The systemd-udev-trigger service calls 'udevadm trigger --type=devices
--action=add', which writes 'add' to all /sys/devices/ uevent nodes, to
re-generate their uevents sent to udev. Until systemd commit
97afc0351a96e0daa83964df33937967c75c644f, any errors during this process
were simply logged to debug and ignored, but now udevadm will log errors
and return failure.
On ppc64el, the /sys/devices/vio device returns ENODEV when writing
'add' to its uevent, which causes the udevadm command to return failure,
which causes the systemd-udev-trigger system service to fail.
The kernel vio driver should be fixed to not return ENODEV.
+
+ [test case]
+
+ On a ppc64el system, with any systemd containing commit
+ 97afc0351a96e0daa83964df33937967c75c644f, check the status of the
+ systemd-udev-trigger service, to see that it's failed.
+
+ Alternately, again on a ppc64el system, run as root:
+
+ # echo add > /sys/devices/vio/uevent
+ -bash: echo: write error: No such device
+
+ [regression potential]
+
+ the potential should be low, as this appears to have always behaved this
+ way, at least for a while now.
+
+ [other info]
+
+ the systemd commit that changes udevadm to start failing for this error
+ isn't included in any Ubuntu release yet, this is found from systemd
+ upstream testing.
** Also affects: linux (Ubuntu Eoan)
Importance: Undecided
Status: Incomplete
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Disco)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Eoan)
Assignee: (unassigned) => Dan Streetman (ddstreet)
** Changed in: linux (Ubuntu Disco)
Assignee: (unassigned) => Dan Streetman (ddstreet)
** Changed in: linux (Ubuntu Bionic)
Assignee: (unassigned) => Dan Streetman (ddstreet)
** Changed in: linux (Ubuntu Eoan)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Disco)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Bionic)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Eoan)
Status: Incomplete => In Progress
** Changed in: linux (Ubuntu Disco)
Status: New => In Progress
** Changed in: linux (Ubuntu Bionic)
Status: New => In Progress
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https://bugs.launchpad.net/bugs/1845319
Title:
writing 'add' to /sys/devices/vio/uevent fails with ENODEV
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