Vincent Donnefort b73c76c3c4 cpu/hotplug: Do not bail-out in DYING/STARTING sections ...

[ Upstream commit 6f855b39e4602b6b42a8e5cbcfefb8a1b8b5f0be ]

The DYING/STARTING callbacks are not expected to fail. However, as reported
by Derek, buggy drivers such as tboot are still free to return errors
within those sections, which halts the hot(un)plug and leaves the CPU in an
unrecoverable state.

As there is no rollback possible, only log the failures and proceed with
the following steps.

This restores the hotplug behaviour prior to commit 453e410851
("cpu/hotplug: Add cpuhp_invoke_callback_range()")

Fixes: 453e410851 ("cpu/hotplug: Add cpuhp_invoke_callback_range()")
Reported-by: Derek Dolney <z23@posteo.net>
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Derek Dolney <z23@posteo.net>
Reviewed-by: Valentin Schneider <vschneid@redhat.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=215867
Link: https://lore.kernel.org/r/20220927101259.1149636-1-vdonnefort@google.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

2022-12-31 13:14:04 +01:00

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